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Homonyms

IRMNG homonym list - genus level - Initial letter = "M" (2359)

Please note, this is a provisional homonyms list from IRMNG on 2019-05-21, and is subject to change. It may include nomina nuda, rejected and otherwise non-current names, plus some published misspellings, in addition to homonyms that have been validly published. A small proportion of duplicate entries awaiting rationalisation may also be included.

Click on any genus name for additional details, as currently available.

Maackia
     Maackia Ruprecht, 1856 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)
     Maackia Clessin, 1880 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Amnicolidae (Family)

Maasia
     Maasia J.B. Mols, P.J.A. Keßler, S.H. Rogstad & R.M.K. Saunders, 2008 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Magnoliales (Order) > Annonaceae (Family)
 Maasia Cossmann, 1908 † accepted as Epiphyllina Kieslinger in Schindewolf, 1939 † · Animalia (Kingdom) > Cnidaria (Phylum) > Scyphozoa (Class) > Coronatae (Order) > Coronatida (awaiting allocation) (Family)

Mabelia
     Mabelia M.A. Gandolfo, K.C. Nixon & W.L. Crepet, 2002 † · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Pandanales (Order) > Triuridaceae (Family)
     Mabelia Kirkaldy, 1903 accepted as Mabelia Kirkaldy, 1903 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Mabella
     Mabella Klenina, 1984 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Strophomenata (Class) > Strophomenatida (Order) > Leptellinidae (Family)
     Mabella Fewkes, 1881 accepted as Mabella Fewkes, 1881 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)

Mabilleodes
 Mabilleodes † accepted as Mabilleodes † (Misspelling) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Vetigastropoda (Order) > Seguenziidae (Family)
     Mabilleodes Marion & Viette, 1956 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Crambidae (Family)
     Mabilleodes Diakonoff, 1960 accepted as Mabilleodes Diakonoff, 1960 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Tortricidae (Family)

Mabillia
     Mabillia Bourguignat, 1876 accepted as Mabillia Bourguignat, 1876 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Mabillia Ragonot, 1888 † accepted as Plagoa Whalley, 1970 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Pyralidae (Family)

Mabuya
     Mabuya Fitzinger, 1826 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Scincidae (Family)
     Mabuya Rafinesque, 1815 accepted as Mabuya Fitzinger, 1826 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Scincidae (Family)

Macabra
     Macabra Bonaparte, 1854 accepted as Macabra Bonaparte, 1854 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Macabra Bonaparte, 1854 accepted as Macabra Bonaparte, 1854 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Macalpinia
     Macalpinia Yoshimoto, 1975 † accepted as Macalpinia Yoshimoto, 1975 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Mymaridae (Family)
 Macalpinia J.C. Arthur, 1906 accepted as Uromycladium McAlpine, 1905 · Fungi (Kingdom) > Basidiomycota (Phylum) > Pucciniomycetes (Class) > Pucciniales (Order) > Pileolariaceae (Family)

Macandrewia
     Macandrewia Gray, 1859 · Animalia (Kingdom) > Porifera (Phylum) > Demospongea (Class) > Lithistida (Order) > Macandrewiidae (Family)
 Macandrewia Bronn, 1861 accepted as Macandrevia King, 1859 · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Terebratulida (Order) > Laqueidae (Family)

Macaria
     Macaria Koch in Panzer, 1834-35 accepted as Macaria Koch in Panzer, 1834-35 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Clubionidae (Family)
     Macaria Curtis, 1826 accepted as Macaria Curtis, 1826 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Macaria Dejean, 1835 accepted as Macaria Dejean, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coccinellidae (Family)
 Macaria Mulsant, 1850 accepted as Pristonema Erichson, 1847 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coccinellidae (Family)

Macarozabrus
 Macarozabrus Ganglbauer, 1931 accepted as Zabrus Schellenberg, 1806 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Macarozabrus Freude, 1986 accepted as Zabrus Schellenberg, 1806 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Macarthuria
     Macarthuria Rehn, 1944 accepted as Macarthuria Rehn, 1944 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Orthoptera (awaiting allocation) (Family)
     Macarthuria Hügel ex Endlicher in Endlicher et al., 1837 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Macarthuriaceae (Family)

Macbridea
     Macbridea Elliott ex Nuttall, 1818 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Lamiaceae (Family)
 Macbridea Rafinesque, 1818 accepted as Pattalias S. Watson, 1889 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Apocynaceae (Family)

Maccevethus
     Maccevethus Dallas, 1852 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Rhopalidae (Family)
 Maccevethus Amyot, 1846 accepted as Maccevethus Dallas, 1852 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Rhopalidae (Family)

Macchiatiella
     Macchiatiella Del Guercio, 1917 accepted as Macchiatiella Del Guercio, 1917 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Aphididae (Family)
     Macchiatiella Del Guercio, 1909 accepted as Macchiatiella Del Guercio, 1909 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Aphididae (Family)

Macclintockia
     Macclintockia O. Heer, 1868 † accepted as Macclintockia O. Heer, 1868 † (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Proteales (Order) > Proteaceae (Family)
     Macclintockia accepted as Macclintockia · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Patellogastropoda (Order) > Nacellidae (Family)

Maccoya
     Maccoya Pomel, 1868 † · Animalia (Kingdom) > Echinodermata (Phylum) > Echinoidea (Class) > Echinocystitoida (Order) > Palaechinidae (Family)
 Maccoya F. von Mueller, 1859 accepted as Rochelia H.G.L. Reichenbach, 1824 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Boraginales (Order) > Boraginaceae (Family)

Macdonaldia
 Macdonaldia Goode & Bean, 1895 accepted as Polyacanthonotus Bleeker, 1874 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Notacanthiformes (Order) > Notacanthidae (Family)
 Macdonaldia J. Lindley, 1840 accepted as Thelymitra J.R. Forster & J.G.A. Forster, 1775 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)

Macdonaldius
     Macdonaldius Khanna, 1933 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Spirurida (Order) > Onchocercidae (Family)
     Macdonaldius Kretzoi & Kretzoi, 2000 † accepted as Macdonaldius Kretzoi & Kretzoi, 2000 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Atelidae (Family)

Macednus
     Macednus Bergroth, 1920 accepted as Macednus Bergroth, 1920 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Macednus Emel'yanov, 1962 accepted as Macednus Emel'yanov, 1962 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Macella
     Macella Stål, 1875 accepted as Macella Stål, 1875 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Phasmatodea (Order) > Diapheromeridae (Family)
     Macella Walker, 1858 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Macella C. Koch, 1856 accepted as Macella C. Koch, 1856 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Macella Averincev, 1972 accepted as Bathymacella Pettibone, 1976 · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Phyllodocida (Order) > Polynoidae (Family)

Macellocerus
     Macellocerus Solier in Baudi & Truqui, 1848 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
     Macellocerus Mik, 1878 accepted as Macellocerus Mik, 1878 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)

Macellolophus
     Macellolophus Attems, 1940 · Animalia (Kingdom) > Arthropoda (Phylum) > Diplopoda (Class) > Polydesmida (Order) > Xystodesmidae (Family)
     Macellolophus Verhoeff, 1931 accepted as Macellolophus Attems, 1940 · Animalia (Kingdom) > Arthropoda (Phylum) > Diplopoda (Class) > Polydesmida (Order) > Xystodesmidae (Family)

Macfadyena
     Macfadyena van Couvering, 1982 † accepted as Macfadyena van Couvering, 1982 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Actinopterygii (awaiting allocation) (Order) > Actinopterygii (awaiting allocation) (Family)
     Macfadyena Alph. de Candolle, 1845 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Bignoniaceae (Family)

Macgillivraya
     Macgillivraya Ashmead, 1898 accepted as Macgillivraya Ashmead, 1898 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Macgillivraya Forbes, 1852 accepted as Macgillivraya Forbes, 1852 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Tonnidae (Family)
 Macgillivraya Grote, 1894 accepted as Friesea Dalla Torre, 1895 · Animalia (Kingdom) > Arthropoda (Phylum) > Collembola (Class) > Poduromorpha (Order) > Neanuridae (Family)

Macgillivrayella
     Macgillivrayella Preston, 1913 accepted as Macgillivrayella Preston, 1913 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Zonitidae (Family)
     Macgillivrayella Ashmead, 1899 accepted as Macgillivrayella Ashmead, 1899 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Macgregorella
     Macgregorella Bartram, 1939 · Plantae (Kingdom) > Bryophyta (Phylum) > Bryopsida (Class) > Isobryales (Order) > Fabroniaceae (Family)
 Macgregorella Seale, 1910 accepted as Callogobius Bleeker, 1874 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Gobiidae (Family)
 Macgregorella Baker & Tuttle, 1972 † accepted as Beerella Wainstein, 1961 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Tetranychidae (Family)

Macgregoria
     Macgregoria De Vis, 1897 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Corvidae (Family)
     Macgregoria F. von Mueller, 1874 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Celastrales (Order) > Celastraceae (Family)
     Macgregoria De Vis, 1897 accepted as Macgregoria De Vis, 1897 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Corvidae (Family)

Machadoa
     Machadoa Lallemand & Synave, 1952 accepted as Machadoa Lallemand & Synave, 1952 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cercopidae (Family)
 Machadoa Welwitsch ex Bentham & J.D. Hooker, 1867 accepted as Adenia Forsskål, 1775 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Passifloraceae (Family)

Machadonia
     Machadonia Bournier, 1965 accepted as Machadonia Bournier, 1965 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Thysanoptera (Order) > Thysanoptera (awaiting allocation) (Family)
 Machadonia Lehtinen, 1967 accepted as Griswoldia Dippenaar-Schoeman & Jocqué, 1997 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Miturgidae (Family)

Machaera
 Machaera Mik, 1890 accepted as Machaera Mik, 1890 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
     Machaera Cuvier, 1832 accepted as Machaera Cuvier, 1832 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
 Machaera Gould, 1841 accepted as Siliqua Megerle von Mühlfeld, 1811 (invalid: junior homonym of Machaera Cuvier, 1832 [Pisces]; Neomachaera is a replacement name) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Pharidae (Family)
 Machaera Agassiz, 1846 accepted as Makaira Lacepède, 1802 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Istiophoridae (Family)

Machaerina
     Machaerina Brady & Norman, 1889 accepted as Machaerina Brady & Norman, 1889 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Podocopida (Order) > Paradoxostomatidae (Family)
     Machaerina Vahl, 1805 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Cyperaceae (Family)

Machaerites
     Machaerites Miller, 1855 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
     Machaerites G. Andreánszky, 1954 † accepted as Machaerites G. Andreánszky, 1954 † (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)

Machaerium
 Machaerium Richardson, 1843 accepted as Congrogadus Günther, 1862 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Pseudochromidae (Family)
     Machaerium Haliday, 1832 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Dolichopodidae (Family)
     Machaerium Persoon, 1807 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)

Machaerophorus
     Machaerophorus Marck, 1863 † accepted as Machaerophorus Marck, 1863 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Crustacea (awaiting allocation) (Class) > Crustacea (awaiting allocation) (Order) > Crustacea (awaiting allocation) (Family)
 Machaerophorus D.F.L. Schlechtendal, 1857 accepted as Sibara E.L. Greene, 1896 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Brassicaceae (Family)

Machaeropterus
     Machaeropterus Bonaparte, 1854 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Tyrannidae (Family)
     Machaeropterus Bonaparte, 1854 accepted as Machaeropterus Bonaparte, 1854 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Tyrannidae (Family)

Machaerorhynchus
 Machaerorhynchus Sharpe, 1879 accepted as Machaerirhynchus Gould, 1852 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Corvidae (Family)
 Machaerorhynchus Salvadori, 1875 accepted as Machaerirhynchus Gould, 1852 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Corvidae (Family)

Machaira
     Machaira Toledo Piza, 1958 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)
 Machaira Brauer & Bergenstamm, 1890 accepted as Machaira Brauer & Bergenstamm, 1890 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)

Machairodus
     Machairodus Kaup, 1833 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Felidae (Family)
 Machairodus Pander, 1856 † accepted as Distacodus Hinde, 1879 † · Animalia (Kingdom) > Chordata (Phylum) > Conodonta (Class) > Protopanderodontida (Order) > Drepanoistodontidae (Family)

Machairophora
     Machairophora Hampson, 1893 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Arctiidae (Family)
     Machairophora Franciscolo, 1943 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Mordellidae (Family)

Machairopus
 Machairopus Brady, 1883 accepted as Scutellidium Claus, 1866 · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Harpacticoida (Order) > Tisbidae (Family)
     Machairopus Thompson, 1888 accepted as Machairopus Thompson, 1888 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Crustacea (awaiting allocation) (Class) > Crustacea (awaiting allocation) (Order) > Crustacea (awaiting allocation) (Family)

Macheiramphus
     Macheiramphus Bonaparte, 1850 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Accipitriformes (Order) > Accipitridae (Family)
     Macheiramphus Westerman, 1848 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Accipitriformes (Order) > Accipitridae (Family)

Macheirhamphus
 Macheirhamphus Schlegel, 1871 accepted as Machaerirhynchus Gould, 1852 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Corvidae (Family)
 Macheirhamphus Schlegel, 1862 accepted as Macheiramphus Bonaparte, 1850 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Accipitriformes (Order) > Accipitridae (Family)

Machilis
     Machilis Latrielle, 1832 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Archaeognatha (Order) > Machilidae (Family)
     Machilis Latreille, 1802 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Archaeognatha (Order) > Machilidae (Family)

Machilus
     Machilus C.G.D. Nees in Wallich, 1831 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Laurales (Order) > Lauraceae (Family)
 Machilus Desrousseaux in Lamarck, 1792 accepted as Machilus Desrousseaux in Lamarck, 1792 (Not validly published) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Laurales (Order) > Lauraceae (Family)

Machimosaurus
     Machimosaurus Meyer, 1837 † · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Crocodylia (Order) > Teleosauridae (Family)
 Machimosaurus Meyer, 1838 † accepted as Machimosaurus Meyer, 1837 † · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Crocodylia (Order) > Teleosauridae (Family)

Machimus
     Machimus Loew, 1849 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Asilidae (Family)
     Machimus Billberg, 1827 accepted as Machimus Billberg, 1827 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)

Machla
     Machla Lichtenstein, 1796 accepted as Machla Lichtenstein, 1796 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Machla Herbst in Jablonsky, 1799 accepted as Pseudomachla Wilke, 1922 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Machlis
     Machlis A.P. de Candolle, 1837 accepted as Machlis A.P. de Candolle, 1837 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Machlis Kaup † accepted as Dama Frisch, 1775 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Cervidae (Family)

Macielia
     Macielia Vandelli, 1788 accepted as Macielia Vandelli, 1788 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Boraginales (Order) > Boraginaceae (Family)
 Macielia Travassos, 1935 accepted as Maciela Travassos, 1935 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Rhabditida (Order) > Molineidae (Family)

Mackaya
     Mackaya W.H. Harvey, 1859 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Acanthaceae (Family)
 Mackaya Arnott, 1838 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Santalales (Order) > Olacaceae (Family)

Mackenziea
     Mackenziea Yanna & K.D. Hyde, 2002 · Fungi (Kingdom) > Ascomycota (Phylum) > Ascomycota incertae sedis (Class) > Ascomycota incertae sedis (Order) > Ascomycota incertae sedis (Family)
 Mackenziea C.G.D. Nees in Alph. de Candolle, 1847 accepted as Strobilanthes Blume, 1826 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Acanthaceae (Family)

Mackenziella
     Mackenziella Hammer in Degerbøl, 1953 · Animalia (Kingdom) > Arthropoda (Phylum) > Collembola (Class) > Symphypleona (Order) > Mackenziellidae (Family)
     Mackenziella Zhegallo in Voronova, Drozdova, Esakova, Zhegallo, Zhuravlev, Rozanov, Sayutina & Ushatinskaya, 1987 † accepted as Mackenziella Zhegallo in Voronova, Drozdova, Esakova, Zhegallo, Zhuravlev, Rozanov, Sayutina & Ushatinskaya, 1987 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Gastropoda (awaiting allocation) (Order) > Gastropoda (awaiting allocation) (Family)
     Mackenziella Omatsola, 1972 accepted as Mackenziella Omatsola, 1972 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Ostracoda (awaiting allocation) (Order) > Ostracoda (awaiting allocation) (Family)
 Mackenziella Becker & Braun, 2007 † accepted as Urftella Becker, 1970 † · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Palaeocopida (Order) > Palaeocopida (awaiting allocation) (Family)

Mackiella
     Mackiella D.S. Edwards & A.G. Lyon, 1983 † accepted as Mackiella D.S. Edwards & A.G. Lyon, 1983 † (unassessed) · Plantae (Kingdom) > Chlorophyta (Phylum) > Ulvophyceae (Class) > Ulotrichales (Order) > Ulotrichales (awaiting allocation) (Family)
     Mackiella Keifer, 1939 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Phytoptidae (Family)

Mackinnonia
     Mackinnonia Runnegar in Bengtson, Conway Morris, Cooper, Jell & Runnegar, 1990 † accepted as Mackinnonia Runnegar in Bengtson, Conway Morris, Cooper, Jell & Runnegar, 1990 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Helcionelloida (Class) > Helcionelliformes (Order) > Helcionellidae (Family)
     Mackinnonia Janiszewska, 1963 · Chromista (Kingdom) > Miozoa (Phylum) > Coccidiomorphea (Class) > Coelotrophiida (Order) > Myriosporidae (Family)

Macleaya
     Macleaya Theobald, 1903 accepted as Macleaya Theobald, 1903 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Culicidae (Family)
     Macleaya R. Brown, 1826 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ranunculales (Order) > Papaveraceae (Family)

Macleayia
     Macleayia Haswell, 1880 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Ischyroceridae (Family)
 Macleayia Blackburn, 1888 accepted as Macleayella Britton, 1990 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
 Macleayia Montrouzier, 1860 accepted as Mac-Leayia Montrouzier, 1860 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)

Macowania
     Macowania D. Oliver, 1870 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Macowania Kalchbrenner ex M.J. Berkeley, 1876 accepted as Macowanites C. Kalchbrenner, 1882 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Russulales (Order) > Russulaceae (Family)

Macquaria
     Macquaria Blome, 2002 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Chromadorida (Order) > Chromadoridae (Family)
     Macquaria Cuvier in Cuvier & Valenciennes, 1830 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Percichthyidae (Family)
     Macquaria Lesson, 1825 accepted as Macquaria Cuvier in Cuvier & Valenciennes, 1830 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Percichthyidae (Family)

Macquariella
 Macquariella Wallwork, 1963 accepted as Macquarioppia Wallwork, 1964 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Oribatida (Order) > Peloppiidae (Family)
 Macquariella Finlay, 1926 accepted as Laevilitorina Pfeffer, 1886 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Littorinidae (Family)

Macquartia
     Macquartia Rouillier & Vossinsky, 1848 accepted as Macquartia Rouillier & Vossinsky, 1848 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Macquartia Robineau-Desvoidy, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
     Macquartia Zetterstedt, 1837 accepted as Macquartia Zetterstedt, 1837 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Mycetophilidae (Family)
     Macquartia Zetterstedt, 1838 accepted as Macquartia Zetterstedt, 1838 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tipulidae (Family)

Macracantha
     Macracantha Simon, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Araneidae (Family)
 Macracantha Kirby, 1904 accepted as Acanthoxyla Uvarov, 1944 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Phasmatodea (Order) > Phasmatidae (Family)

Macracanthus
     Macracanthus Chaudoir, 1846 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Macracanthus Moghe, 1925 accepted as Megalacanthus Moghe, 1926 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Cestoda (Class) > Cyclophyllidea (Order) > Dilepididae (Family)

Macraea
     Macraea J.D. Hooker, 1847 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
     Macraea J. Lindley, 1828 accepted as Macraea J. Lindley, 1828 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Geraniales (Order) > Geraniaceae (Family)
 Macraea Subramanian, 1953 accepted as Prathigada Subramanian in Subramanian & Ramakrishnan, 1956 · Fungi (Kingdom) > Ascomycota (Phylum) > Ascomycota incertae sedis (Class) > Ascomycota incertae sedis (Order) > Ascomycota incertae sedis (Family)
 Macraea R. Wight, 1852 accepted as Phyllanthus Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Phyllanthaceae (Family)

Macramphis
     Macramphis Timm, 1961 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Rhabditida (Order) > Rhabditidae (Family)
     Macramphis Altherr, 1950 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Monhysterida (Order) > Diplopeltidae (Family)

Macranillus
 Macranillus Sharp, 1903 accepted as Nesomicrops Sharp, 1903 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Macranillus Baehr & Main, 2016 accepted as Magnanillus Baehr, 2017 (junior homonym) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Macraspis
     Macraspis Macleay, 1819 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
     Macraspis Olsson, 1870 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Aspidogastrida (Order) > Aspidogastridae (Family)

Macraulacus
     Macraulacus de Bonvouloir, 1872 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Eucnemidae (Family)
 Macraulacus Fairmaire, 1893 accepted as Bathyanulacus Fairmaire, 1894 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Macria
 Macria Tenore, 1847 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Boraginales (Order) > Boraginaceae (Family)
     Macria (E.H.F. Meyer) Spach, 1840 accepted as Macria (E.H.F. Meyer) Spach, 1840 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Santalales (Order) > Balanophoraceae (Family)

Macrobasis
 Macrobasis Leconte, 1862 accepted as Epicauta Dejean, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Meloidae (Family)
 Macrobasis Starbäck, 1893 accepted as Leptosphaeria Cesati & De Notaris, 1863 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Pleosporales (Order) > Leptosphaeriaceae (Family)

Macrobdella
     Macrobdella Philippi, 1872 accepted as Macrobdella Philippi, 1872 (unassessed) · Animalia (Kingdom) > Annelida (Phylum) > Hirudinea (Class) > Hirudinoidea (awaiting allocation) (Order) > Hirudinoidea (awaiting allocation) (Family)
     Macrobdella Verrill, 1872 · Animalia (Kingdom) > Annelida (Phylum) > Hirudinea (Class) > Arhynchobdellida (Order) > Macrobdellidae (Family)

Macrobela
     Macrobela Turner, 1939 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Crambidae (Family)
     Macrobela Turner, 1947 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Oecophoridae (Family)

Macrobothrium
     Macrobothrium Fitzinger, 1843 accepted as Macrobothrium Fitzinger, 1843 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
 Macrobothrium Khalil & Abdul-Salam, 1989 accepted as Echinobothrium van Beneden, 1849 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Cestoda (Class) > Diphyllidea (Order) > Echinobothriidae (Family)

Macrobrachius
     Macrobrachius Dziedzicki, 1889 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Mycetophilidae (Family)
     Macrobrachius Hoffmann, 1916 † accepted as Macrobrachius Hoffmann, 1916 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)

Macrobunus
     Macrobunus Tullgren, 1907 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Amaurobiidae (Family)
 Macrobunus Roewer, 1912 accepted as Aboriscus Roewer, 1940 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Opiliones (Order) > Epedanidae (Family)

Macrocalyx
     Macrocalyx C.J. Trew, 1761 accepted as Macrocalyx C.J. Trew, 1761 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Boraginales (Order) > Boraginaceae (Family)
 Macrocalyx Van Tieghem, 1895 accepted as Aetanthus (Eichler) Engler in Engler & Prantl, 1889 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Santalales (Order) > Loranthaceae (Family)
 Macrocalyx Costantin & H. Poisson, 1908 accepted as Megistostegium Hochreutiner, 1916 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malvales (Order) > Malvaceae (Family)

Macrocaudus
     Macrocaudus de Moraes, McMurtry & de Carvalho Mineiro, 2003 accepted as Macrocaudus de Moraes, McMurtry & de Carvalho Mineiro, 2003 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Phytoseiidae (Family)
     Macrocaudus Shinji, 1930 accepted as Macrocaudus Shinji, 1930 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Macrocaulus
     Macrocaulus Fairmaire, 1899 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Macrocaulus Aurivillius, 1912 accepted as Marocaulus Fairmaire, 1900 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Macrocentrum
     Macrocentrum J.D. Hooker in Bentham & J.D. Hooker, 1867 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Melastomataceae (Family)
 Macrocentrum R.A. Philippi, 1870 accepted as Habenaria Willdenow, 1805 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)

Macrocephalus
     Macrocephalus J. Lindley, 1846 accepted as Macrocephalus J. Lindley, 1846 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
     Macrocephalus Fitzinger, 1843 accepted as Macrocephalus Fitzinger, 1843 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
     Macrocephalus Bate, 1858 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Oxycephalidae (Family)
     Macrocephalus Luo & Hu in Luo, Hu, Chen, Zhang & Tao, 1999 † accepted as Macrocephalus Luo & Hu in Luo, Hu, Chen, Zhang & Tao, 1999 † (unassessed) · Animalia (Kingdom) > Problematica (Phylum) > Problematica (awaiting allocation) (Class) > Problematica (awaiting allocation) (Order) > Problematica (awaiting allocation) (Family)
     Macrocephalus Swederus, 1787 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Phymatidae (Family)
 Macrocephalus Browne, 1789 accepted as Macrocephalus Browne, 1789 (Published in a rejected work (ICZN)) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Centropomidae (Family)
 Macrocephalus Bleeker, 1876 accepted as Centropomus Lacepède, 1802 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Centropomidae (Family)
 Macrocephalus Olivier, 1789 accepted as Platystomos Schneider, 1791 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthribidae (Family)
 Macrocephalus Palmer, 1904 accepted as Phacochoerus F. Cuvier, 1826 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Suidae (Family)
 Macrocephalus Frisch, 1775 accepted as Phacochoerus F. Cuvier, 1826 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Suidae (Family)

Macrocera
     Macrocera Meigen, 1803 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Keroplatidae (Family)
 Macrocera Latreille, 1810 accepted as Tetralonia Spinola, 1839 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Apidae (Family)

Macroceras
     Macroceras Staudinger in Kalchberg, 1876 accepted as Macroceras Staudinger in Kalchberg, 1876 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Macroceras Semper, 1870 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Helicarionidae (Family)

Macroceratium
     Macroceratium (A.P. de Candolle) H.G.L. Reichenbach, 1829 accepted as Macroceratium (A.P. de Candolle) H.G.L. Reichenbach, 1829 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Brassicaceae (Family)
     Macroceratium C.A. Kofoid, 1909 accepted as Macroceratium C.A. Kofoid, 1909 (unassessed) · Chromista (Kingdom) > Miozoa (Phylum) > Dinophyceae (Class) > Gonyaulacales (Order) > Ceratiaceae (Family)
     Macroceratium Böhm, 1931 accepted as Macroceratium Böhm, 1931 (unassessed) · Chromista (Kingdom) > Miozoa (Phylum) > Dinophyceae (Class) > Gonyaulacales (Order) > Ceratiaceae (Family)

Macrocercus
     Macrocercus Vieillot, 1816 accepted as Macrocercus Vieillot, 1816 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Macrocercus Westwood in Partington, 1836 accepted as Macrocercus Westwood in Partington, 1836 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Ephemeroptera (Order) > Ephemeroptera (awaiting allocation) (Family)
     Macrocercus Müller, 1773 accepted as Macrocercus Müller, 1773 (unassessed) · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Trematoda (awaiting allocation) (Order) > Trematoda (awaiting allocation) (Family)
     Macrocercus Nitzsch in Ersch & Gruber, 1827 accepted as Macrocercus Nitzsch in Ersch & Gruber, 1827 (unassessed) · Protozoa (Kingdom) > (Phylum) > Protozoa (awaiting allocation) (Class) > (Order) > (Family)

Macrocerus
     Macrocerus Motschoulsky, 1845 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cantharidae (Family)
 Macrocerus Oken, 1817 accepted as Tetralonia Spinola, 1839 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Apidae (Family)
 Macrocerus Evans, 1941 accepted as Zaletta Metcalf, 1952 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadellidae (Family)

Macrochaeta
     Macrochaeta Grube, 1850 · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Flabelligerida (Order) > Acrocirridae (Family)
 Macrochaeta Bretscher, 1896 accepted as Vejdovskyella Michaelsen, 1903 · Animalia (Kingdom) > Annelida (Phylum) > Oligochaeta (Class) > Haplotaxida (Order) > Naididae (Family)
 Macrochaeta E.G. von Steudel, 1854 accepted as Pennisetum L.C. Richard in Persoon, 1805 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Poaceae (Family)

Macrochasma
 Macrochasma Perkins, 1940 accepted as Macrochasma Perkins, 1940 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Macrochasma Dall, 1915 accepted as Macrochasma Dall, 1915 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Macrocheilus
     Macrocheilus Hope, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Macrocheilus Phillips, 1841 † accepted as Macrochilina Bayle, 1880 † (non Kirby, 1838) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Coenogastropoda incertae sedis (Order) > Subulitidae (Family)

Macrocheira
     Macrocheira Laubmann, 1924 accepted as Macrocheira Laubmann, 1924 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Macrocheira De Haan in Siebold, 1839 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Inachidae (Family)

Macrocheles
     Macrocheles Latreille in Cuvier, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Macrochelidae (Family)
 Macrocheles Berlese, 1918 accepted as Glyptholaspis Filipponi & Pegazzano, 1960 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Macrochelidae (Family)

Macrochelys
     Macrochelys Meyer, 1858 accepted as Macrochelys Meyer, 1858 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
     Macrochelys Gray, 1856 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Testudines (Order) > Chelydridae (Family)

Macrochemus
     Macrochemus Nopcsa, 1930 † accepted as Macrochemus Nopcsa, 1930 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Protorosauria (Order) > Protorosauridae (Family)
 Macrochemus accepted as Macrochenus Guérin-Ménéville in Delessert, 1843 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Macrochila
     Macrochila Stephens, 1829 accepted as Macrochila Stephens, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Macrochila Stephens, 1834 accepted as Macrochila Stephens, 1834 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Macrochile
     Macrochile Loew, 1850 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tanyderidae (Family)
     Macrochile Loew in Berendt, 1845 accepted as Macrochile Loew in Berendt, 1845 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Ptychopteridae (Family)
 Macrochile Walker, 1856 accepted as Macrochilo Hübner, 1825 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Macrochilo
     Macrochilo Hübner, 1825 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Macrochilo Hampson, 1897 accepted as Macrochilo Hampson, 1897 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Pyralidae (Family)
 Macrochilo Snellen, 1890 accepted as Promacrochilo Bleszynski, 1962 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Crambidae (Family)

Macrochilus
     Macrochilus K.B. Presl, 1836 accepted as Macrochilus K.B. Presl, 1836 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Campanulaceae (Family)
 Macrochilus Hope, 1838 accepted as Macrocheilus Hope, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Macrochilus Knowles & Westcott, 1837 accepted as Miltonia J. Lindley, 1837 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)
 Macrochilus Agassiz, 1846 accepted as Macrocheilus Hope, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Macrochira
     Macrochira Zetterstedt, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Piophilidae (Family)
     Macrochira Meigen, 1803 accepted as Macrochira Meigen, 1803 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Ephydridae (Family)
     Macrochira Zetterstedt, 1837 accepted as Macrochira Zetterstedt, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Piophilidae (Family)

Macrochirus
     Macrochirus Perty, 1831 accepted as Macrochirus Perty, 1831 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Macrochirus Swainson, 1839 accepted as Pterois Oken, 1817 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Scorpaeniformes (Order) > Scorpaenidae (Family)
 Macrochirus Agassiz, 1846 † accepted as Strobeus Koninck, 1881 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Coenogastropoda incertae sedis (Order) > Soleniscidae (Family)
 Macrochirus Agassiz, 1846 accepted as Macrocheirus Schönherr, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dryophthoridae (Family)
 Macrochirus Gemminger & Harold, 1871 accepted as Macrocheirus Schönherr, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dryophthoridae (Family)
 Macrochirus Agassiz, 1846 accepted as Macrocheilus Hope, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Macrochiton
     Macrochiton Redtenbacher in Brunner v. Wattenwyl, 1895 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)
 Macrochiton (Blume) M.J. Roemer, 1846 accepted as Dysoxylum Blume, 1825 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Sapindales (Order) > Meliaceae (Family)

Macrochlaena
     Macrochlaena Robson, 1929 · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Octopoda (Order) > Octopodidae (Family)
 Macrochlaena Handel-Mazzetti, 1933 accepted as Nothosmyrnium Miquel, 1867 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Apiales (Order) > Apiaceae (Family)

Macrochlamis
     Macrochlamis Dall, 1898 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pterioida (Order) > Pterioida (awaiting allocation) (Family)
 Macrochlamis Heude, 1890 accepted as Macrochlamys Benson, 1832 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Ariophantidae (Family)

Macrochlamys
     Macrochlamys Benson, 1832 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Ariophantidae (Family)
 Macrochlamys Decaisne, 1849 accepted as Drymonia C.F.P. Martius, 1829 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Gesneriaceae (Family)
 Macrochlamys Sacco in Bellardi & Sacco, 1897 † accepted as Gigantopecten Rovereto, 1899 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pterioida (Order) > Pterioida (awaiting allocation) (Family)

Macrocnema
     Macrocnema Carlgren, 1928 · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Actiniaria (Order) > Condylanthidae (Family)
 Macrocnema Stephens, 1831 accepted as Psylliodes Berthold in Latreille, 1827 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Macrocoleus
     Macrocoleus Desvignes, 1850 accepted as Macrocoleus Desvignes, 1850 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Macrocoleus Fieber, 1858 accepted as Megalocoleus Reuter, 1890 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Miridae (Family)

Macrocolus
     Macrocolus Engel, 1930 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Asilidae (Family)
 Macrocolus Wagner, 1846 accepted as Dipodomys Gray, 1841 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Rodentia (Order) > Heteromyidae (Family)

Macrocoma
     Macrocoma Chapuis in Lacordaire, 1874 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
     Macrocoma (Hornschuch ex Müller Hal.) Grout, 1944 · Plantae (Kingdom) > Bryophyta (Phylum) > Bryopsida (Class) > Orthotrichales (Order) > Orthotrichaceae (Family)

Macrocorynus
 Macrocorynus Schönherr, 1823 accepted as Myllocerus Schönherr, 1823 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Macrocorynus Voss, 1953 accepted as Macrostylus Schönherr, 1840 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Macroctenia
     Macroctenia Hampson, 1900 accepted as Macroctenia Hampson, 1900 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Macroctenia Turner, 1930 accepted as Macroxystra Fletcher, 1979 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Macrocystis
     Macrocystis C.Agardh, 1820 · Chromista (Kingdom) > Ochrophyta (Phylum) > Phaeophyceae (Class) > Laminariales (Order) > Laminariaceae (Family)
 Macrocystis R. Heim, 1931 accepted as Macrocystidia Josserand, 1934 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Agaricales (Order) > Marasmiaceae (Family)

Macrodactyla
     Macrodactyla Haddon, 1898 · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Actiniaria (Order) > Actiniidae (Family)
 Macrodactyla Harris in Hitchcock, 1833 † accepted as Macrodactyla Harris in Hitchcock, 1833 † (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)

Macroderma
     Macroderma F. von Höhnel, 1917 · Fungi (Kingdom) > Ascomycota (Phylum) > Leotiomycetes (Class) > Rhytismatales (Order) > Rhytismataceae (Family)
     Macroderma Miller, 1906 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Chiroptera (Order) > Megadermatidae (Family)

Macrodes
     Macrodes Guenée, 1854 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Macrodes Dejean, 1833 accepted as Macrodes Dejean, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)
 Macrodes Candèze, 1863 accepted as Neonomopleus Schenkling, 1927 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)

Macrodictya
     Macrodictya Guthörl, 1940 † accepted as Macrodictya Guthörl, 1940 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Palaeodictyoptera (Order) > Palaeodictyoptera (awaiting allocation) (Family)
 Macrodictya A. Massalongo, 1852 accepted as Lasallia Mérat, 1821 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Umbilicariales (Order) > Umbilicariaceae (Family)

Macrodon
     Macrodon Schinz in Cuvier, 1822 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Sciaenidae (Family)
 Macrodon Arnott, 1825-1826 accepted as Macrodon Arnott, 1825-1826 (nomen rejiciendum) · Plantae (Kingdom) > Bryophyta (Phylum) > Bryopsida (Class) > Dicranales (Order) > Dicranaceae (Family)
 Macrodon Müller, 1843 accepted as Hoplias Gill, 1903 (synonym) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Characiformes (Order) > Erythrinidae (Family)
 Macrodon Buckman, 1845 † accepted as Parallelodon Meek & Worthen, 1866 † (invalid: junior homonym of Macrodon Schinz, 1822 [Pisces]; Parallelodon and Beushausenia are replacement names) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Arcida (Order) > Parallelodontidae (Family)

Macrodonta
     Macrodonta Deshayes, 1861 † accepted as Macrodonta Deshayes, 1861 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Macrodonta Costa, 1846 accepted as Macrodonta Costa, 1846 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Macrodorcinus
     Macrodorcinus Maes, 1992 accepted as Macrodorcinus Maes, 1992 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Lucanidae (Family)
     Macrodorcinus Maes, 1990 accepted as Macrodorcinus Maes, 1990 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Lucanidae (Family)

Macrodus
 Macrodus Gray, 1865 accepted as Paradoxurus Cuvier in Geoffroy & Cuvier, 1821 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Viverridae (Family)
 Macrodus Clarke, 1907 † accepted as Parallelodon Meek & Worthen, 1866 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Arcida (Order) > Parallelodontidae (Family)

Macrogaster
     Macrogaster Miescher, 1843 accepted as Macrogaster Miescher, 1843 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Arachnida (awaiting allocation) (Order) > Arachnida (awaiting allocation) (Family)
     Macrogaster Brullé in Lepeletier, 1846 accepted as Macrogaster Brullé in Lepeletier, 1846 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Macrogaster Thunberg, 1805 accepted as Atractocerus Palisot de Beauvois, 1802 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Lymexylidae (Family)
 Macrogaster Duponchel, 1845 accepted as Phragmataecia Newman, 1850 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Cossidae (Family)

Macrogerodonia
     Macrogerodonia Bernhauer, 1941 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Macrogerodonia Bernhauer, 1951 accepted as Macrogerodonia Bernhauer, 1941 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Macroglossa
     Macroglossa Westwood, 1835 accepted as Macroglossa Westwood, 1835 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
     Macroglossa Radoszkowski, 1884 accepted as Macroglossa Radoszkowski, 1884 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Macroglossa Ochsenheimer, 1816 accepted as Macroglossum Scopoli, 1777 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
 Macroglossa Gray, 1870 accepted as Probosciger Kuhl, 1820 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Psittaciformes (Order) > Cacatuidae (Family)
 Macroglossa Lesson, 1827 accepted as Macroglossus Cuvier, 1824 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Chiroptera (Order) > Pteropodidae (Family)

Macroglossum
     Macroglossum Scopoli, 1777 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
 Macroglossum Hilpert, 1933 accepted as · Plantae (Kingdom) > Bryophyta (Phylum) > Bryopsida (Class) > Dicranales (Order) > Trichostomaceae (Family)
 Macroglossum Gray, 1825 accepted as Macroglossus Cuvier, 1824 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Chiroptera (Order) > Pteropodidae (Family)
 Macroglossum Temminck, 1849 accepted as Probosciger Kuhl, 1820 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Psittaciformes (Order) > Cacatuidae (Family)
 Macroglossum Copeland, 1909 accepted as Angiopteris G.F. Hoffmann, 1796 · Plantae (Kingdom) > Tracheophyta (Phylum) > Polypodiopsida (Class) > Marattiales (Order) > Marattiaceae (Family)

Macroglossus
     Macroglossus Boisduval, 1833 accepted as Macroglossus Boisduval, 1833 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Macroglossus Cuvier, 1824 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Chiroptera (Order) > Pteropodidae (Family)
 Macroglossus Schinz, 1824 accepted as Macroglossus Cuvier, 1824 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Chiroptera (Order) > Pteropodidae (Family)

Macrognathus
     Macrognathus Lacepède, 1800 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Synbranchiformes (Order) > Mastacembelidae (Family)
 Macrognathus Gronow in Gray, 1854 accepted as Macroramphosus Lacepède, 1803 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Syngnathiformes (Order) > Centriscidae (Family)
 Macrognathus Hope, 1845 accepted as Prosopocoilus Hope, 1845 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Lucanidae (Family)

Macrogonum
 Macrogonum Csiki, 1931 accepted as Macrogonum Csiki, 1931 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Macrogonum Casey, 1920 accepted as Colpodes Macleay, 1825 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Macrolaimus
     Macrolaimus Maupas, 1900 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Diplogasterida (Order) > Chambersiellidae (Family)
     Macrolaimus Ditlevsen, 1918 · Animalia (Kingdom) > Nematoda (Phylum) > Enoplea (Class) > Tripyloidida (Order) > Tripyloididae (Family)

Macrolenes
     Macrolenes Naudin, 1850 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Melastomataceae (Family)
     Macrolenes Dejean, 1835 accepted as Macrolenes Dejean, 1835 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
     Macrolenes Chevrolat, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Macrolepis
     Macrolepis Marck, 1863 † accepted as Macrolepis Marck, 1863 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
 Macrolepis A. Richard in Dumont d'Urville, 1834 accepted as Bulbophyllum Du Petit-Thouars, 1822 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)
 Macrolepis Rye, 1885 accepted as Echthrogaleus Steenstrup & Lütken, 1861 · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Siphonostomatoida (Order) > Pandaridae (Family)
     Macrolepis Rafinesque, 1815 accepted as Apogon Lacepède, 1801 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Apogonidae (Family)

Macroleptura
     Macroleptura Nakane & Ohbayashi, 1957 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Macroleptura Garrido, 1975 accepted as Anolis Daudin, 1802 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Dactyloidae (Family)

Macrolinum
     Macrolinum H.G.L. Reichenbach, 1837 accepted as Macrolinum H.G.L. Reichenbach, 1837 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Linaceae (Family)
 Macrolinum Klotzsch, 1838 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Ericaceae (Family)

Macrolobium
     Macrolobium Schreber, 1789 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)
 Macrolobium Zippel ex Müller Berol. in Walpers, 1858 accepted as Macrolobium Zippel ex Müller Berol. in Walpers, 1858 (Not validly published) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)
 Macrolobium Zippel ex Miquel, 1855 accepted as Macrolobium Zippel ex Miquel, 1855 (Not validly published) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)

Macroma
 Macroma Gory & Percheron, 1833 accepted as Campsiura Hope, 1831 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
 Macroma Gray, 1825 accepted as Macoma Leach in Ross, 1819 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Tellinidae (Family)

Macromastax
     Macromastax Karsch, 1889 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Euschmidtiidae (Family)
 Macromastax Beebe, 1933 accepted as Bathylaco Goode & Bean, 1896 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Osmeriformes (Order) > Alepocephalidae (Family)

Macromastix
     Macromastix Osten-Sacken, 1886 accepted as Macromastix Osten-Sacken, 1886 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tipulidae (Family)
     Macromastix A.C. Stokes, 1890 · Protozoa (Kingdom) > (Phylum) > (Class) > Sarcomastigota (awaiting allocation) (Order) > Sarcomastigota (awaiting allocation) (Family)

Macromeria
     Macromeria Saunders, 1850 accepted as Macromeria Saunders, 1850 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Macromeria D. Don, 1832 accepted as Lithospermum Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Boraginales (Order) > Boraginaceae (Family)

Macromeris
     Macromeris Lepeletier, 1831 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Pompilidae (Family)
 Macromeris Arnaud, 1979 accepted as Macromeracis Enderlein, 1921 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Stratiomyidae (Family)

Macromerus
     Macromerus Schönherr, 1825 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Macromerus Smith, 1833 accepted as Propithecus Bennett, 1832 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Indriidae (Family)

Macronema
     Macronema Pictet, 1836 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Trichoptera (Order) > Hydropsychidae (Family)
 Macronema Stephens, 1829 accepted as Macronema Stephens, 1829 (Suppressed name (ICZN)) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Macronema Nuttall, 1840 accepted as Ericameria Nuttall, 1840 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Macrones
     Macrones Newman, 1841 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Macrones Duméril, 1856 accepted as Sperata Holly, 1939 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Siluriformes (Order) > Sisoridae (Family)

Macronevra
     Macronevra Macquart, 1834 accepted as Macronevra Macquart, 1834 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
 Macronevra Blanchard, 1840 accepted as Eupelmus Dalman, 1820 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Eupelmidae (Family)

Macronix
     Macronix Bigot, 1857 accepted as Macronix Bigot, 1857 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
 Macronix Bonaparte, 1831 accepted as Macronyx Swainson, 1827 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Passeridae (Family)

Macronoides
     Macronoides White, 1934 † accepted as Macronoides White, 1934 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
 Macronoides accepted as Oplostomus McLeay in Smith, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
 Macronoides Hora, 1921 accepted as Batasio Blyth, 1860 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Siluriformes (Order) > Bagridae (Family)

Macronotus
     Macronotus Douglas & Scott, 1865 accepted as Macronotus Douglas & Scott, 1865 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Macronotus Hong & Wang, 1990 † accepted as Macronotus Hong & Wang, 1990 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)

Macronoxia
 Macronoxia Dalla Torre, 1912 accepted as Macronoxia Dalla Torre, 1912 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Macronoxia Crotch, 1873 accepted as Polyphylla Harris, 1841 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Macronyx
     Macronyx Swainson, 1827 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Passeridae (Family)
     Macronyx Felder, 1874 accepted as Macronyx Felder, 1874 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Macronyx Dalzell, 1850 accepted as Macronyx Dalzell, 1850 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)

Macroon
     Macroon Pilsbry in Tryon & Pilsbry, 1891 accepted as Macroon Pilsbry in Tryon & Pilsbry, 1891 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Macroon Corda in J. Sturm, 1833 accepted as Helminthosporium Link, 1809 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Pleosporales (Order) > Massarinaceae (Family)

Macroön
 Macroön Corda, 1833 accepted as Helminthosporium Link, 1809 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Pleosporales (Order) > Massarinaceae (Family)
 Macroön Pilsbry in Tryon & Pilsbry, 1891 accepted as Macroon Pilsbry in Tryon & Pilsbry, 1891 · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Macropalpus
     Macropalpus Duda, 1926 accepted as Macropalpus Duda, 1926 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Drosophilidae (Family)
     Macropalpus Meunier, 1893 accepted as Macropalpus Meunier, 1893 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
     Macropalpus Ratzeburg, 1844 accepted as Macropalpus Ratzeburg, 1844 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Macropalpus Hagen in Berendt, 1856 accepted as Macropalpus Hagen in Berendt, 1856 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Neuroptera (Order) > Hemerobiidae (Family)
 Macropalpus Cussac, 1852 accepted as Coryphium Stephens, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Macropalpus Rondani, 1864 accepted as Spathipalpus Rondani, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)

Macroparalepis
     Macroparalepis Burton, 1934 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Aulopiformes (Order) > Paralepididae (Family)
 Macroparalepis Ege, 1933 accepted as Macroparalepis Burton, 1934 (synonym) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Aulopiformes (Order) > Paralepididae (Family)

Macropelma
 Macropelma K.M. Schumann in Engler, 1895 accepted as Sacleuxia Baillon, 1890 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Apocynaceae (Family)
 Macropelma Gistl, 1848 accepted as Chlorota Burmeister, 1844 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Macropelmus
     Macropelmus Dejean, 1821 accepted as Bogous Germar, 1817 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Macropelmus Gistel, 1848 accepted as Astralium Link, 1807 (Unnecessary substitute name for Calcar Montfort, 1810) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Vetigastropoda (Order) > Turbinidae (Family)

Macropeplus
     Macropeplus Poppius, 1912 accepted as Macropeplus Poppius, 1912 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Macropeplus J. Perkins, 1898 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Laurales (Order) > Monimiaceae (Family)

Macropetalichthys
     Macropetalichthys Broili, 1933 † accepted as Macropetalichthys Broili, 1933 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
     Macropetalichthys Norwood & Owen, 1846 † · Animalia (Kingdom) > Chordata (Phylum) > Placodermi (Class) > Petalichthyida (Order) > Macropetalichthyidae (Family)

Macrophallus
     Macrophallus Müller, 1922 accepted as Macrophallus Müller, 1922 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
     Macrophallus Otagaki, 1958 accepted as Macrophallus Otagaki, 1958 (unassessed) · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Digenea (awaiting allocation) (Order) > Digenea (awaiting allocation) (Family)

Macropharynx
     Macropharynx Näsmark, 1937 accepted as Macropharynx Näsmark, 1937 (unassessed) · Animalia (Kingdom) > Platyhelminthes (Phylum) > Turbellaria (Class) > Tricladida (Order) > Paramphistomidae (Family)
     Macropharynx Rusby, 1927 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Apocynaceae (Family)
 Macropharynx Brauer, 1902 accepted as Eurypharynx Vaillant, 1882 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Saccopharyngiformes (Order) > Eurypharyngidae (Family)

Macrophomopsis
     Macrophomopsis Petrak, 1924 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Botryosphaeriales (Order) > Botryosphaeriaceae (Family)
 Macrophomopsis F.L. Stevens & Baechler in Weedon, 1926 accepted as Lasiodiplodia J.B. Ellis & Everhart, 1896 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Botryosphaeriales (Order) > Botryosphaeriaceae (Family)

Macrophora
     Macrophora Rafinesque, 1838 accepted as Macrophora Rafinesque, 1838 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Passifloraceae (Family)
 Macrophora accepted as Macropophora Thomson, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Macrophora Conrad, 1865 † accepted as Encope L. Agassiz, 1840 (subjective junior synonym) · Animalia (Kingdom) > Echinodermata (Phylum) > Echinoidea (Class) > Clypeasteroida (Order) > Mellitidae (Family)

Macrophtalmus
 Macrophtalmus Laporte, 1832 accepted as Macrophtalmus Laporte, 1832 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Macrophtalmus Montrouzier, 1855 accepted as Macrophtalmus Montrouzier, 1855 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)

Macrophthalmia
 Macrophthalmia Gasp. accepted as Ficus Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Rosales (Order) > Moraceae (Family)
 Macrophthalmia Plate, 1897 accepted as Geotria Gray, 1851 · Animalia (Kingdom) > Chordata (Phylum) > Cephalaspidomorphi (Class) > Petromyzontiformes (Order) > Petromyzontidae (Family)

Macrophthalmus
     Macrophthalmus Desmarest, 1823 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Macrophthalmidae (Family)
 Macrophthalmus Laporte, 1832 accepted as Macrophthalmus Laporte, 1832 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Macrophya
     Macrophya Dahlbom, 1835 accepted as Macrophya Dahlbom, 1835 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Tenthredinidae (Family)
 Macrophya Brèthes, 1926 accepted as Trichophya Mannerheim, 1831 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Macrophylla
     Macrophylla Hope, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
     Macrophylla Hughes, 1928 accepted as Macrophylla Hughes, 1928 (unassessed) · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Capsalidea (Order) > Capsalidae (Family)

Macrophyllum
     Macrophyllum Gray, 1838 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Chiroptera (Order) > Phyllostomidae (Family)
 Macrophyllum Paetel, 1875 accepted as Macrophyllum Paetel, 1875 (Misspelling) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Macrophyllum Schmarda, 1861 accepted as Notophyllum Örsted, 1843 (Subjective synonym) · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Phyllodocida (Order) > Phyllodocidae (Family)

Macropia
     Macropia Malloch, 1930 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
     Macropia Costa, 1836 accepted as Macropia Costa, 1836 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Macropipus
     Macropipus Cocco, 1832 accepted as Macropipus Cocco, 1832 · Animalia (Kingdom) > Arthropoda (Phylum) > Crustacea (awaiting allocation) (Class) > Crustacea (awaiting allocation) (Order) > Crustacea (awaiting allocation) (Family)
     Macropipus Prestandrea, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Polybiidae (Family)

Macropoda
 Macropoda Montrouzier, 1861 accepted as Pactola Pascoe, 1876 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Macropoda Solier, 1835 accepted as Adesmia Fischer von Waldheim, 1822 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Macropodia
 Macropodia Fuckel, 1869 accepted as Helvella Linnaeus, 1753 · Fungi (Kingdom) > Ascomycota (Phylum) > Pezizomycetes (Class) > Pezizales (Order) > Helvellaceae (Family)
     Macropodia Leach, 1814 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Inachidae (Family)

Macropodina
     Macropodina Casey, 1915 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
     Macropodina R.M. King & H.E. Robinson, 1972 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Macropodus
     Macropodus Lacepède, 1801 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Osphronemidae (Family)
     Macropodus Fischer, 1830 accepted as Macropodus Fischer, 1830 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)

Macropogon
     Macropogon Rafinesque, 1815 accepted as Macropogon Rafinesque, 1815 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Macropogon Motschoulsky, 1845 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Artematopodidae (Family)
     Macropogon Migula, 1897 † · Plantae (Kingdom) > Charophyta (Phylum) > Charophyceae (Class) > Charales (Order) > Characeae (Family)

Macroporella
     Macroporella J. von Pia, 1912 † accepted as Macroporella J. von Pia, 1912 † (unassessed) · Plantae (Kingdom) > Chlorophyta (Phylum) > Ulvophyceae (Class) > Dasycladales (Order) > Dasycladaceae (Family)
     Macroporella Uttley, 1949 † accepted as Macroporella Uttley, 1949 † (unassessed) · Animalia (Kingdom) > Bryozoa (Phylum) > Bryozoa (awaiting allocation) (Class) > Bryozoa (awaiting allocation) (Order) > Bryozoa (awaiting allocation) (Family)

Macroporina
     Macroporina Uttley, 1949 † · Animalia (Kingdom) > Bryozoa (Phylum) > Gymnolaemata (Class) > Cheilostomatida (Order) > Cheilostomatida (awaiting allocation) (Family)
 Macroporina Balavoine, 1960 † accepted as Macroporina Uttley, 1949 † · Animalia (Kingdom) > Bryozoa (Phylum) > Gymnolaemata (Class) > Cheilostomatida (Order) > Cheilostomatida (awaiting allocation) (Family)

Macroporus
     Macroporus Uhler, 1875 accepted as Macroporus Uhler, 1875 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cydnidae (Family)
 Macroporus Sharp, 1882 accepted as Megaporus Brinck, 1944 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dytiscidae (Family)

Macrops
     Macrops Burmeister, 1835 accepted as Macrops Burmeister, 1835 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Macrops de Vis, 1884 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Agamidae (Family)
     Macrops Wagler, 1830 accepted as Macrops Wagler, 1830 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Colubridae (Family)
 Macrops Kirby in Richardson, 1837 accepted as Listronotus Jekel, 1865 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Macrops Duméril, 1856 accepted as Etelis Cuvier in Cuvier & Valenciennes, 1828 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Lutjanidae (Family)

Macropsalis
     Macropsalis Sclater, 1866 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Strigiformes (Order) > Caprimulgidae (Family)
 Macropsalis Sørensen in Koch (Keyserling), 1886 accepted as Megalopsalis Roewer, 1923 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Opiliones (Order) > Megalopsalididae (Family)

Macropsis
     Macropsis Lewis, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadellidae (Family)
 Macropsis G.O. Sars, 1877 accepted as Mesopodopsis Czerniavsky, 1882 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Mysida (Order) > Mysidae (Family)

Macroptera
     Macroptera Duda, 1927 accepted as Macroptera Duda, 1927 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Drosophilidae (Family)
     Macroptera Lioy, 1863 accepted as Macroptera Lioy, 1863 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tipulidae (Family)
     Macroptera Laurentiaux, 1949 † accepted as Macroptera Laurentiaux, 1949 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Palaeodictyoptera (Order) > Palaeodictyoptera (awaiting allocation) (Family)
 Macroptera Becker, 1889 accepted as Symballophthalmus Becker, 1889 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Hybotidae (Family)

Macropterna
     Macropterna Fieber, 1860 accepted as Macropterna Fieber, 1860 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Lygaeidae (Family)
 Macropterna Hitchcock, 1848 † accepted as Batrachopus Hitchcock, 1845 † · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Crocodylia (Order) > Batrachopodidae (Family)

Macropterum
     Macropterum Gistl, 1831 accepted as Macropterum Gistl, 1831 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Macropterum Gistel, 1848 accepted as Macropterus Boheman in Schönherr, 1840 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Macropterum Gistel, 1834 accepted as Proteinus Latreille, 1796 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Macropterus
 Macropterus Gray, 1840 accepted as Macropterus Gray, 1840 (Misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Macropterus Boheman in Schönherr, 1840 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Macropteryx
     Macropteryx Hong, 1976 † accepted as Macropteryx Hong, 1976 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Mecoptera (Order) > Mecoptera (awaiting allocation) (Family)
 Macropteryx Swainson, 1831 accepted as Hemiprocne Nitzsch, 1829 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Macropus
     Macropus Shaw, 1790 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Diprotodontia (Order) > Macropodidae (Family)
     Macropus Nuttall, 1834 accepted as Macropus Nuttall, 1834 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Macropus Birula, 1893 accepted as Macropus Birula, 1893 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Arachnida (awaiting allocation) (Order) > Arachnida (awaiting allocation) (Family)
 Macropus Horn, 1866 accepted as Macropoides Guérin-Ménéville, 1844 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
 Macropus Spix, 1824 accepted as Dromococcyx Wied, 1832 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Cuculiformes (Order) > Neomorphidae (Family)
 Macropus Günther, 1861 accepted as Macropodus Lacepède, 1801 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Osphronemidae (Family)
 Macropus Audinet-Serville, 1835 accepted as Macropophora Thomson, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Macropus Fischer, 1806 accepted as Galago Geoffroy, 1796 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Galagonidae (Family)
 Macropus Thunberg, 1805 accepted as Acrocinus Illiger, 1806 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Macropus Latreille, 1803 accepted as Inachus Weber, 1795 (pre-occupied) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Majidae (Family)

Macropygus
     Macropygus Cotteau in Desor, 1857 accepted as Macropygus Cotteau in Desor, 1857 (unassessed) · Animalia (Kingdom) > Echinodermata (Phylum) > Echinodermata (awaiting allocation) (Class) > Echinodermata (awaiting allocation) (Order) > Echinodermata (awaiting allocation) (Family)
 Macropygus Pomel, 1883 † accepted as Pygaster L. Agassiz, 1835 † (subjective junior synonym) · Animalia (Kingdom) > Echinodermata (Phylum) > Echinoidea (Class) > Pygasteroida (Order) > Pygasteridae (Family)

Macrorhabdus
     Macrorhabdus Tomaszewski, Logan, Snowden, Kurtzman & Phalen, 2003 · Fungi (Kingdom) > Ascomycota (Phylum) > Saccharomycetes (Class) > Saccharomycetales (Order) > Saccharomycetales incertae sedis (Family)
 Macrorhabdus Sars G.O., 1920 accepted as Hemirhabdus Wolfenden, 1911 (synonym) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Calanoida (Order) > Heterorhabdidae (Family)

Macrorhamphus
     Macrorhamphus Leach, 1816 accepted as Limnodromus Wied, 1833 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Charadriiformes (Order) > Scolopacidae (Family)
     Macrorhamphus Jakovlev, 1876 accepted as Macrorhamphus Jakovlev, 1876 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Macrorhamphus E. Forster, 1817 accepted as Limnodromus Wied, 1833 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Charadriiformes (Order) > Scolopacidae (Family)
 Macrorhamphus Fischer, 1813 accepted as Macroramphosus Lacepède, 1803 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Syngnathiformes (Order) > Centriscidae (Family)

Macrorhinus
 Macrorhinus Gray, 1825 accepted as Mirounga Gray, 1827 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Phocidae (Family)
 Macrorhinus Berthold in Latreille, 1827 accepted as Eurhinus Illiger, 1807 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Macrorhinus Cuvier, 1826 accepted as Mirounga Gray, 1827 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Phocidae (Family)

Macrorhynchus
     Macrorhynchus Duméril, 1806 accepted as Macrorhynchus Duméril, 1806 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
     Macrorhynchus Graff, 1882 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Turbellaria (Class) > Rhabdocoela (Order) > Polycystididae (Family)
     Macrorhynchus Dunker, 1843 accepted as Macrorhynchus Dunker, 1843 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
 Macrorhynchus Lessing, 1832 accepted as Agoseris Rafinesque, 1817 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Macrorhynchus Sultan, Singh & Sakhuja, 1991 accepted as Tylenchorhynchus Cobb, 1913 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Panagrolaimida (Order) > Telotylenchidae (Family)

Macrorynchia
 Macrorynchia Allman, 1877 accepted as Macrorhynchia Kirchenpauer, 1872 · Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Leptothecata (Order) > Plumulariidae (Family)
 Macrorynchia Stechow, 1919 accepted as Macrorhynchia Kirchenpauer, 1872 · Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Leptothecata (Order) > Aglaopheniidae (Family)

Macrosaurus
     Macrosaurus Barkas, 1873 † accepted as Macrosaurus Barkas, 1873 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Amphibia (awaiting allocation) (Order) > Amphibia (awaiting allocation) (Family)
     Macrosaurus Owen, 1849 † accepted as Macrosaurus Owen, 1849 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Mosasauridae (Family)

Macroscaphosoma
     Macroscaphosoma Löbl, 1970 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Macroscaphosoma Pic, 1928 accepted as Macroscaphosoma Löbl, 1970 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Macroschisma
     Macroschisma Gray, 1835 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Vetigastropoda (Order) > Fissurellidae (Family)
 Macroschisma Agassiz, 1846 accepted as Macroschisma Gray, 1835 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Vetigastropoda (Order) > Fissurellidae (Family)

Macroselinum
 Macroselinum Della Valle, 1913 accepted as Macroselinum Della Valle, 1913 (Misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Ascidiacea (Class) > Aplousobranchia (Order) > Polyclinidae (Family)
 Macroselinum Schur, 1853 accepted as Macroselinum Schur, 1853 (Not validly published) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Apiales (Order) > Apiaceae (Family)

Macrosiagon
     Macrosiagon Hentz, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ripiphoridae (Family)
 Macrosiagon Reitter, 1910 accepted as Macrosiagon Hentz, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ripiphoridae (Family)

Macrosiphon
 Macrosiphon Hochstetter, 1841 accepted as Rhamphicarpa Bentham in W.J. Hooker, 1836 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Orobanchaceae (Family)
 Macrosiphon Del Guercio, 1914 accepted as Macrosiphum Passerini, 1860 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Aphididae (Family)
 Macrosiphon Miquel, 1847 accepted as Hindsia Bentham ex J. Lindley, 1844 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)

Macrosiphum
     Macrosiphum Passerini, 1860 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Aphididae (Family)
     Macrosiphum Oestlund, 1886 † accepted as Macrosiphum Oestlund, 1886 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Aphididae (Family)

Macrosolen
     Macrosolen Zittel, 1883 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Psammobiidae (Family)
     Macrosolen (Blume) H.G.L. Reichenbach, 1841 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Santalales (Order) > Loranthaceae (Family)

Macrosoma
     Macrosoma Hübner, 1818 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Hedylidae (Family)
     Macrosoma de Haan, 1826 accepted as Macrosoma de Haan, 1826 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Odonata (awaiting allocation) (Family)
     Macrosoma Robineau-Desvoidy, 1830 accepted as Macrosoma Robineau-Desvoidy, 1830 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Muscidae (Family)
     Macrosoma Lioy, 1864 accepted as Macrosoma Lioy, 1864 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Sarcophagidae (Family)
 Macrosoma Hope, 1837 accepted as Sericoides Guérin-Ménéville, 1839 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
 Macrosoma Leach in Bowdich, 1819 accepted as Psammophis Fitzinger, 1826 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Colubridae (Family)
     Macrosoma Hammer, 1979 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Oribatida (Order) > Granuloppiidae (Family)
     Macrosoma Brandt, 1835 accepted as Macrosoma Brandt, 1835 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)

Macrospira
     Macrospira Guilding in Swainson, 1840 accepted as Macrospira Guilding in Swainson, 1840 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Macrospira Sandberger, 1872 † accepted as Stilospirula Rovereto, 1899 † (invalid: junior homonym of Macrospira Guilding in Swainson, 1840. Rovereto (1899: 109) introduced Stilospirula as replacement name) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sorbeoconcha (Order) > Melanopsidae (Family)

Macrospondylus
     Macrospondylus Brehm, 1831 accepted as Macrospondylus Brehm, 1831 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
     Macrospondylus Meyer, 1830 accepted as Macrospondylus Meyer, 1830 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)

Macrospora
     Macrospora Fuckel, 1870 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Pleosporales (Order) > Pleosporaceae (Family)
 Macrospora Tsyganov et al., 1964 accepted as Streptomyces Waksman & Henrici, 1943 (Approved Lists, 1980) · Bacteria (Kingdom) > Actinobacteria (Phylum) > Actinobacteria (Class) > Actinomycetales (Order) > Streptomycetaceae (Family)

Macrostachya
     Macrostachya W.P. Schimper, 1869 † accepted as Macrostachya W.P. Schimper, 1869 † (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Polypodiopsida (Class) > Equisetidae (awaiting allocation) (Order) > Equisetidae (awaiting allocation) (Family)
 Macrostachya C.F.F. Hochstetter ex A. Richard, 1850 accepted as Enteropogon C.G.D. Nees in Lindley, 1836 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Poaceae (Family)

Macrostegia
 Macrostegia Turczaninow, 1852 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malvales (Order) > Thymelaeaceae (Family)
 Macrostegia C.G.D. Nees in Alph. de Candolle, 1847 accepted as Vitex Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Lamiaceae (Family)

Macrostigma
     Macrostigma Rondani, 1877 accepted as Macrostigma Rondani, 1877 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Macrostigma W.J. Hooker, 1841 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Rosales (Order) > Rosaceae (Family)
 Macrostigma Kunth, 1848 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Liliales (Order) > Liliaceae (Family)

Macrostoma
     Macrostoma Agassiz, 1838 † accepted as Macrostoma Agassiz, 1838 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Osteichthyes (awaiting allocation) (Class) > Osteichthyes (awaiting allocation) (Order) > Osteichthyes (awaiting allocation) (Family)
 Macrostoma Örsted, 1843 accepted as Macrostomum Schmidt, 1848 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Turbellaria (Class) > Macrostomida (Order) > Macrostomidae (Family)
     Macrostoma Risso, 1827 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Myctophiformes (Order) > Myctophidae (Family)
 Macrostoma A. Alexeieff, 1909 accepted as Chilomastix Alexeieff, 1910 (junior homonym) · Protozoa (Kingdom) > Metamonada (Phylum) > Carpomonadea (Class) > Chilomastigida (Order) > Chilomastigidae (Family)

Macrostyla
     Macrostyla Winnertz, 1846 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Chloropidae (Family)
 Macrostyla Lioy, 1864 accepted as Aspistyla Duda in Lindner, 1933 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Chloropidae (Family)

Macrostylis
     Macrostylis G.O. Sars, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Macrostylidae (Family)
     Macrostylis Bartling & H.L. Wendland, 1824 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Sapindales (Order) > Rutaceae (Family)
 Macrostylis Breda, 1828 accepted as Corymborkis Du Petit-Thouars, 1809 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)

Macrosubulitermes
     Macrosubulitermes Emerson, 1960 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Isoptera (Order) > Termitidae (Family)
     Macrosubulitermes Emerson, 1955 accepted as Macrosubulitermes Emerson, 1960 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Isoptera (Order) > Termitidae (Family)

Macrotarsipodes
     Macrotarsipodes Le Cerf in Oberthuer, 1917 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sesiidae (Family)
     Macrotarsipodes Le Cerf in Oberthuer, 1916 accepted as Macrotarsipodes Le Cerf in Oberthuer, 1917 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sesiidae (Family)

Macrotarsius
     Macrotarsius Clark, 1941 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Anaptomorphidae (Family)
 Macrotarsius Blyth, 1848 accepted as Himantopus Brisson, 1760 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Charadriiformes (Order) > Charadriidae (Family)

Macrotarsus
     Macrotarsus Clark, 1941 † accepted as Macrotarsus Clark, 1941 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)
 Macrotarsus Schönherr, 1842 accepted as Macrotarrhus Bedel, 1906 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Macrotarsus Link, 1795 accepted as Tarsius Storr, 1780 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Tarsiidae (Family)
 Macrotarsus Lacepède, 1799 accepted as Himantopus Brisson, 1760 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Charadriiformes (Order) > Charadriidae (Family)
 Macrotarsus Mohrig, 2004 accepted as Epidapus Haliday in Walker, 1851 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Sciaridae (Family)

Macrotelus
     Macrotelus Chaudoir, 1879 accepted as Macrotelus Chaudoir, 1879 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Macrotelus Klug, 1842 accepted as Monophylla Spinola, 1841 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cleridae (Family)
 Macrotelus Peringuey, 1896 accepted as Mamboicus Bates, 1886 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Macrotheca
     Macrotheca Waagen, 1880 † accepted as Macrotheca Waagen, 1880 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Macrotheca Nutting, 1900 accepted as Macrotheca Nutting, 1900 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
     Macrotheca Ragonot, 1891 accepted as Macrotheca Ragonot, 1891 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Macrothops
     Macrothops Dejean, 1833 accepted as Macrothops Dejean, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
     Macrothops Dupont in Boisduval, 1835 accepted as Macrothops Dupont in Boisduval, 1835 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
 Macrothops Boisduval, 1835 accepted as Phyllotocus Fischer, 1823 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
 Macrothops Macleay, 1864 accepted as Neophyllotocus Blackburn, 1898 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Macrothorax
     Macrothorax Jaennicke, 1867 accepted as Macrothorax Jaennicke, 1867 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tipulidae (Family)
 Macrothorax Desmarest in Chenu, 1851 accepted as Carabus Linnaeus, 1758 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Macrothorax Lioy, 1864 accepted as Polyodaspis Duda in Lindner, 1933 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Chloropidae (Family)

Macrothrips
     Macrothrips Bagnall, 1908 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Thysanoptera (Order) > Phlaeothripidae (Family)
     Macrothrips Buffa, 1908 accepted as Macrothrips Buffa, 1908 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Thysanoptera (Order) > Thysanoptera (awaiting allocation) (Family)

Macrothyreus
     Macrothyreus Westwood, 1842 accepted as Macrothyreus Westwood, 1842 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Macrothyreus Fieber, 1851 accepted as Macrothyreus Fieber, 1851 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Macrotis
     Macrotis Dejean, 1834 accepted as Macrotis Dejean, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Hydroscaphidae (Family)
     Macrotis Reid, 1837 accepted as Macrotis Reid, 1837 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Peramelina (Order) > Thylacomyidae (Family)
 Macrotis Wagner in Schreber, 1855 accepted as Odocoileus Rafinesque, 1832 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Cervidae (Family)
 Macrotis Schürhoff, 1933 accepted as Macrotina Strand, 1934 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Macrotoma
     Macrotoma Audinet-Serville, 1832 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Macrotoma Trueman, 1942 accepted as Macoma Leach in Ross, 1819 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Tellinidae (Family)
 Macrotoma Laporte, 1832 accepted as Longina Wiedemann, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Neriidae (Family)
 Macrotoma Bourlet, 1839 accepted as Tomocerus Nicolet, 1841 · Animalia (Kingdom) > Arthropoda (Phylum) > Collembola (Class) > Entomobryomorpha (Order) > Tomoceridae (Family)

Macrotona
     Macrotona Brunner, 1893 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
     Macrotona Meyrick, 1904 accepted as Macrotona Meyrick, 1904 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Macrotrachelus
     Macrotrachelus Latreille, 1822 accepted as Macrotrachelus Latreille, 1822 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Macrotrachelus Giebel, 1850 accepted as Macrotrachelus Giebel, 1850 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)

Macrotrema
     Macrotrema Gupta, 1951 accepted as Macrotrema Gupta, 1951 (unassessed) · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Trematoda (awaiting allocation) (Order) > Trematoda (awaiting allocation) (Family)
     Macrotrema Regan, 1912 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Synbranchiformes (Order) > Synbranchidae (Family)

Macrotus
     Macrotus Gray, 1843 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Chiroptera (Order) > Phyllostomidae (Family)
     Macrotus Leach, 1816 accepted as Plecotus É. Geoffroy Saint-Hilaire, 1818 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Chiroptera (Order) > Vespertilionidae (Family)

Macroura
     Macroura Reitter, 1873 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Nitidulidae (Family)
     Macroura Meuschen, 1778 accepted as Macroura Meuschen, 1778 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)
 Macroura Loew in Berendt, 1845 accepted as Macrocera Meigen, 1803 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Keroplatidae (Family)

Macrourus
     Macrourus Hodgson, 1841 accepted as Macrourus Hodgson, 1841 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Macrourus Bloch, 1786 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Gadiformes (Order) > Macrouridae (Family)

Macrovelia
     Macrovelia Uhler, 1872 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Macroveliidae (Family)
     Macrovelia Tamanini, 1947 accepted as Macrovelia Tamanini, 1947 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Veliidae (Family)

Macrura
 Macrura van Hasselt, 1823 accepted as Hilsa Regan, 1917 (synonym) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Clupeiformes (Order) > Clupeidae (Family)
 Macrura Fowler, 1941 accepted as Hilsa Regan, 1917 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Clupeiformes (Order) > Clupeidae (Family)

Macrurus
     Macrurus Lioy, 1864 accepted as Macrurus Lioy, 1864 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
 Macrurus Schneider, 1801 accepted as Macrourus Bloch, 1786 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Gadiformes (Order) > Macrouridae (Family)

Mactrula
     Mactrula Risso, 1826 accepted as Mactrula Risso, 1826 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Mactrula Marwick, 1948 † accepted as Pseudocardium Gabb, 1866 † (synonym) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Mactridae (Family)

Macularia
     Macularia Albers, 1850 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Helicidae (Family)
     Macularia Martens, 1860 accepted as Macularia Martens, 1860 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Maculia
     Maculia Robineau-Desvoidy, 1863 accepted as Maculia Robineau-Desvoidy, 1863 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
     Maculia E.A. Hodgson, 1965 accepted as Maculia E.A. Hodgson, 1965 (unassessed) · Plantae (Kingdom) > Marchantiophyta (Phylum) > Jungermanniopsida (Class) > Jungermanniales (Order) > Lepidoziaceae (Family)

Macvicaria
     Macvicaria Gibson & Bray, 1982 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Plagiorchiida (Order) > Opecoelidae (Family)
     Macvicaria W.E. Nicholson in Handel-Mazzetti, 1930 · Plantae (Kingdom) > Marchantiophyta (Phylum) > Jungermanniopsida (Class) > Porellales (Order) > Porellaceae (Family)

Mada
     Mada Mulsant, 1850 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coccinellidae (Family)
 Mada Jeffreys, 1867 † accepted as Buccinum Linnaeus, 1758 (Invalid: junior homonym of Mada Mulsant, 1850; Mala and Madiella are replacement names) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Buccinidae (Family)

Madagascaracarus
     Madagascaracarus Gaud, 1979 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Astigmata (Order) > Pterolichidae (Family)
 Madagascaracarus Dubinin, 1956 accepted as Madagascaracarus Gaud, 1979 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Astigmata (Order) > Pterolichidae (Family)

Madagascaria
 Madagascaria Morelet, 1882 accepted as Madagascaria Morelet, 1882 (Unjustified (?) emendation) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Madagascaria J.A. West & N. Kikuchi, 2010 · Plantae (Kingdom) > Rhodophyta (Phylum) > Compsopogonophyceae (Class) > Erythropeltidales (Order) > Erythropeltidales incertae sedis (Family)

Madagassoconnus
     Madagassoconnus Franz, 1986 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Madagassoconnus Franz, 1977 accepted as Madagassoconnus Franz, 1986 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Madagaster
     Madagaster Perkins, 1997 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Hydraenidae (Family)
     Madagaster G.L. Nesom, 1993 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Maddenia
     Maddenia J.D. Hooker & T. Thomson, 1854 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Rosales (Order) > Rosaceae (Family)
     Maddenia Kramarz & Bond, 2009 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Astrapotheria (Order) > Astrapotheriidae (Family)

Madigania
 Madigania Whitley, 1945 accepted as Leiopotherapon Fowler, 1931 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Terapontidae (Family)
 Madigania Sprigg, 1949 † accepted as Spriggia Southcott, 1958 † · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria incertae sedis (Class) > Cnidaria incertae sedis (Order) > Cnidaria incertae sedis (Family)

Madopterus
     Madopterus Schönherr, 1836 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
     Madopterus Schönherr, 1833 accepted as Madopterus Schönherr, 1836 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
     Madopterus Dejean, 1835 accepted as Madopterus Schönherr, 1836 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Madrela
     Madrela Jocqué, 1991 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Zodariidae (Family)
 Madrela de Gregorio, 1884 † accepted as Vulsella Röding, 1798 (synonym) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pterioida (Order) > Pteriidae (Family)

Madygenia
     Madygenia Sharov, 1968 † accepted as Madygenia Sharov, 1968 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Orthoptera (awaiting allocation) (Family)
     Madygenia T.A. Sixtel, 1956 † accepted as Madygenia T.A. Sixtel, 1956 † (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Pteridophyta/Pteridospermophyta (unclassified foliage) (Class) > Pteridophyta/Pteridospermophyta (awaiting allocation) (Order) > Pteridophytes/Pteridosperms (awaiting allocation) (Family)
     Madygenia Petrunina in Repina et al., 1975 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Proetida (Order) > Proetida (awaiting allocation) (Family)

Maena
     Maena Gistl, 1847 accepted as Maena Gistl, 1847 (unassessed) · Animalia (Kingdom) > Nemertea (Phylum) > Nemertea (awaiting allocation) (Class) > Nemertea (awaiting allocation) (Order) > Nemertea (awaiting allocation) (Family)
 Maena Cuvier, 1829 accepted as Spicara Rafinesque, 1810 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Centracanthidae (Family)
 Maena Agassiz, 1846 accepted as Maena Agassiz, 1846 (Unjustified (?) emendation) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Maenas
     Maenas Hübner, 1819 accepted as Maenas Hübner, 1819 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Arctiidae (Family)
     Maenas Hübner, 1823 accepted as Maenas Hübner, 1823 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
 Maenas Bleeker, 1876 accepted as Spicara Rafinesque, 1810 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Centracanthidae (Family)
 Maenas Walbaum, 1792 accepted as Spicara Rafinesque, 1810 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Centracanthidae (Family)
 Maenas Klein, 1776 accepted as Spicara Rafinesque, 1810 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Centracanthidae (Family)

Maenia
 Maenia Pagenstecher, 1909 accepted as Maenia Pagenstecher, 1909 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Uraniidae (Family)
 Maenia Dalton, 1880 † accepted as Maenia Dalton, 1880 † (Misspelling) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pholadomyoida (Order) > Megadesmidae (Family)
 Maenia Jacobi, 1928 accepted as Maeniana Metcalf, 1952 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Eurybrachidae (Family)

Maeonia
     Maeonia Stål, 1863 accepted as Maeonia Stål, 1863 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Fulgoridae (Family)
 Maeonia Dana, 1849 † accepted as Maeonia Dana, 1849 † (Unjustified (?) emendation) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pholadomyoida (Order) > Megadesmidae (Family)

Maera
     Maera Leach, 1814 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Maeridae (Family)
 Maera H. Adams & A. Adams, 1858 accepted as Moerella P. Fischer, 1887 (error pro Moera H. Adams & A. Adams, 1856) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Tellinidae (Family)

Maeropsis
     Maeropsis Chevreux, 1919 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Maeridae (Family)
     Maeropsis Chevreux, 1927 † accepted as Maeropsis Chevreux, 1927 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Melitidae (Family)

Maesia
     Maesia de Carvalho & Nihei, 2002 accepted as Maesia de Carvalho & Nihei, 2002 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Muscidae (Family)
     Maesia Stephens, 1831 accepted as Maesia Stephens, 1831 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Maesia Schouteden, 1919 accepted as Maesia Schouteden, 1919 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Maga
     Maga Bolivar, 1918 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Maga Urban, 1912 accepted as Thespesia Solander ex Correa, 1807 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malvales (Order) > Malvaceae (Family)

Magadania
     Magadania Ganelin, 1977 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Strophomenata (Class) > Productida (Order) > Monticuliferidae (Family)
     Magadania Kirpichnikova & Yamanaka, 2001 accepted as Magadania Kirpichnikova & Yamanaka, 2001 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Pyralidae (Family)
     Magadania M.G. Pimenov & T.V. Lavrova, 1985 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Apiales (Order) > Apiaceae (Family)
 Magadania Shinohara, Nazarkin & Chereshnev, 2004 accepted as Magadanichthys Shinohara, Nazarkin, Yabe & Chereshnev, 2006 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Zoarcidae (Family)

Magallana
 Magallana Cavanilles, 1798 accepted as Tropaeolum Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Tropaeolaceae (Family)
     Magallana Salvi & Mariottini, 2016 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Ostreida (Order) > Ostreidae (Family)

Magallanella
     Magallanella Rose, 1975 accepted as Magallanella Rose, 1975 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Ostracoda (awaiting allocation) (Order) > Ostracoda (awaiting allocation) (Family)
     Magallanella Pescador & Peters, 1980 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Ephemeroptera (Order) > Leptophlebiidae (Family)

Magdalinus
 Magdalinus Germar in Schönherr, 1843 accepted as Magdalis Germar, 1817 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Magdalinus Daniel, 1903 accepted as Magdalis Germar, 1817 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Magellana
     Magellana Staudinger, 1898 accepted as Magellana Staudinger, 1898 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Magellana accepted as Magallana Cavanilles, 1798 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Tropaeolaceae (Family)

Maghadena
     Maghadena Viette, 1962 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Maghadena Beck, 1991 accepted as Maghadena Beck, 1991 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Maghrebiella
     Maghrebiella Lacourt, 1988 accepted as Maghrebiella Lacourt, 1988 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Tenthredinidae (Family)
     Maghrebiella Baha & Berra, 2001 accepted as Maghrebiella Baha & Berra, 2001 (unassessed) · Animalia (Kingdom) > Annelida (Phylum) > Annelida (awaiting allocation) (Class) > Annelida (awaiting allocation) (Order) > Annelida (awaiting allocation) (Family)

Magnaperiporites
     Magnaperiporites A.E. González Guzmán, 1967 † accepted as Magnaperiporites A.E. González Guzmán, 1967 † (unassessed) · Plantae (Kingdom) > Sporae dispersae (Phylum) > (Class) > (Order) > (Family)
 Magnaperiporites M. Kedves in M. Kedves & D.E. Russell, 1982 † accepted as · Plantae (Kingdom) > Sporae dispersae (Phylum) > (Class) > (Order) > (Family)

Magnea
     Magnea Vigneaux, 1949 † · Animalia (Kingdom) > Bryozoa (Phylum) > Gymnolaemata (Class) > Cheilostomatida (Order) > Cheilostomatida (awaiting allocation) (Family)
 Magnea Schmidt, 1950 accepted as Maynea Cunningham, 1871 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Zoarcidae (Family)

Magnella
 Magnella Dittmer, 1960 † accepted as Mioawateria Vella, 1954 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Raphitomidae (Family)
     Magnella Neumann, Pozaryska & Vachard, 1975 † accepted as Magnella Neumann, Pozaryska & Vachard, 1975 † (unassessed) · Protozoa (Kingdom) > (Phylum) > Protozoa (awaiting allocation) (Class) > (Order) > (Family)

Magninia
     Magninia Clermont, 1932 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Magninia M. Choisy, 1929 accepted as Lecanora Acharius, 1810 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Lecanorales (Order) > Lecanoraceae (Family)

Magnisphaera
     Magnisphaera J. Campb., J.L. Anderson & Shearer, 2003 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Microascales (Order) > Halosphaeriaceae (Family)
     Magnisphaera Won, 1997 † accepted as Magnisphaera Won, 1997 † (unassessed) · Chromista (Kingdom) > Retaria (Phylum) > Polycystinea (Class) > Entactinaria (Order) > Entactiniidae (Family)

Magnoculus
     Magnoculus Briggs & Bartels, 2001 † accepted as Magnoculus Briggs & Bartels, 2001 † (unassessed) · Animalia (Kingdom) > Problematica (Phylum) > Problematica (awaiting allocation) (Class) > Problematica (awaiting allocation) (Order) > Problematica (awaiting allocation) (Family)
     Magnoculus McDermott, 1964 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Lampyridae (Family)

Magnusia
     Magnusia Klotzsch, 1854 accepted as Magnusia Klotzsch, 1854 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Cucurbitales (Order) > Begoniaceae (Family)
 Magnusia P.A. Saccardo, 1878 accepted as Kernia Nieuwland, 1916 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Microascales (Order) > Microascaceae (Family)

Magonia
     Magonia A.F.C.P. Saint-Hilaire, 1824 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Sapindales (Order) > Sapindaceae (Family)
 Magonia Vellozo, 1829 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Polygonaceae (Family)

Magrettia
     Magrettia Brunner, 1888 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Gryllacrididae (Family)
     Magrettia Cameron, 1901 accepted as Magrettia Cameron, 1901 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Ichneumonidae (Family)

Magula
     Magula Fruhstorfer in Seitz, 1911 accepted as Magula Fruhstorfer in Seitz, 1911 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Magula Scudder, 1882 accepted as Magula Scudder, 1882 · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Magus
 Magus Brown, 1844 † accepted as Magas Sowerby, 1816 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Terebratulida (Order) > Terebratellidae (Family)
 Magus Lesson, 1827 accepted as Macaca Lacepède, 1799 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Cercopithecidae (Family)

Mahea
     Mahea Distant, 1909 accepted as Mahea Distant, 1909 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Mahea Pierre, 1890 accepted as Manilkara Adanson, 1763 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Sapotaceae (Family)

Maia
     Maia Reichenbach, 1850 accepted as Maia Reichenbach, 1850 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Maia R.A. Salisbury, 1866 accepted as Maia R.A. Salisbury, 1866 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Liliales (Order) > Liliaceae (Family)
 Maia Sugiyama, 1940 † accepted as Kitakamiphyllum Hill, 1956 † · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Rugosa (Order) > Rugosa (awaiting allocation) (Family)
 Maia Lamarck, 1801 accepted as Maja Lamarck, 1801 (incorrect spelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Majidae (Family)
 Maia Frédéricks, 1924 † accepted as Callispirina Cooper & Muir-Wood, 1951 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Spiriferida (Order) > Spiriferinidae (Family)

Maidenia
 Maidenia Domin, 1922 accepted as Uldinia J.M. Black, 1922 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Apiales (Order) > Apiaceae (Family)
 Maidenia Rendle, 1916 accepted as Vallisneria Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Alismatales (Order) > Hydrocharitaceae (Family)

Maimon
 Maimon Wagner, 1839 accepted as Macaca Lacepède, 1799 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Cercopithecidae (Family)
 Maimon Trouessart, 1904 accepted as Mandrillus Ritgen, 1824 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Cercopithecidae (Family)

Maina
     Maina Hodgson, 1837 accepted as Maina Hodgson, 1837 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Maina Gistel, 1848 accepted as Lethrinus Cuvier, 1829 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Lethrinidae (Family)

Mainatus
     Mainatus Vieillot, 1817 accepted as Mainatus Vieillot, 1817 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Mainatus Rafinesque, 1815 accepted as Mainatus Rafinesque, 1815 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Maindronia
     Maindronia Bouvier, 1897 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Zygentoma (Order) > Maindroniidae (Family)
 Maindronia Théry, 1930 accepted as Therybuprestis Strand, 1932 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)
 Maindronia Roewer, 1910 accepted as Gagrella Stoliczka, 1869 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Opiliones (Order) > Sclerosomatidae (Family)

Maja
     Maja Gray, 1841 accepted as Maja Gray, 1841 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Maja Lamarck, 1801 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Majidae (Family)
     Maja Weddell, 1857 accepted as Maja Weddell, 1857 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
     Maja Lomovitskaya in Khalfin, 1955 † accepted as Maja Lomovitskaya in Khalfin, 1955 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)

Majella
     Majella Ortmann, 1893 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Majidae (Family)
 Majella Kirkaldy, 1906 accepted as Deferunda Distant, 1912 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Achilidae (Family)
 Majella Cambridge, 1896 accepted as Majellula Strand, 1932 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Thomisidae (Family)

Makaia
     Makaia Strand · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Nolidae (Family)
 Makaia S.F. Gray, 1821 accepted as · Chromista (Kingdom) > Ochrophyta (Phylum) > Phaeophyceae (Class) > Fucales (Order) > Sargassaceae (Family)

Makbelaspis
     Makbelaspis Lisogor, 1977 † accepted as Makbelaspis Lisogor, 1977 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)
     Makbelaspis Lisogor, 1974 † accepted as Makbelaspis Lisogor, 1974 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)

Makilingana
     Makilingana Miller, 1954 accepted as Makilingana Miller, 1954 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Reduviidae (Family)
     Makilingana Mahmood, 1967 accepted as Makilingana Mahmood, 1967 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Mala
     Mala Distant, 1884 accepted as Mala Distant, 1884 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Mala Cossmann, 1901 † accepted as Buccinum Linnaeus, 1758 (Replacement name for Mada Jeffreys, 1867, but itself a junior homonym of Mala Distant, 1854) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Buccinidae (Family)
 Mala Forster & Wilton, 1973 accepted as Maloides Forster & Wilton in Platnick, 1989 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Amaurobiidae (Family)

Malabaila
     Malabaila G.F. Hoffmann, 1814 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Apiales (Order) > Apiaceae (Family)
 Malabaila Tausch, 1834 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Apiales (Order) > Apiaceae (Family)

Malacantha
 Malacantha Pierre, 1891 accepted as Pouteria Aublet, 1775 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Sapotaceae (Family)
 Malacantha Paetel, 1875 accepted as Thiara Röding, 1798 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sorbeoconcha (Order) > Thiaridae (Family)

Malaclemys
     Malaclemys Gray, 1844 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Testudines (Order) > Emydidae (Family)
     Malaclemys Gray, 1840 accepted as Malaclemys Gray, 1844 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Testudines (Order) > Emydidae (Family)

Malacobagrus
     Malacobagrus Bleeker, 1863 accepted as Malacobagrus Bleeker, 1863 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Siluriformes (Order) > Pimelodidae (Family)
     Malacobagrus Bleeker, 1862 accepted as Brachyplatystoma Bleeker, 1862 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Siluriformes (Order) > Pimelodidae (Family)

Malacocarpus
     Malacocarpus F.E.L. Fischer & C.A. Meyer, 1843 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Sapindales (Order) > Nitrariaceae (Family)
 Malacocarpus Salm-Reifferscheid-Dyck, 1850 accepted as Parodia Spegazzini, 1923 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Cactaceae (Family)

Malacocephalus
     Malacocephalus Tausch, 1828 accepted as Malacocephalus Tausch, 1828 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
     Malacocephalus Günther, 1862 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Gadiformes (Order) > Macrouridae (Family)

Malacomyza
     Malacomyza Curtis, 1837 accepted as Malacomyza Curtis, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
     Malacomyza Haliday, 1838 accepted as Malacomyza Haliday, 1838 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
     Malacomyza Wesmael, 1836 accepted as Malacomyza Wesmael, 1836 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Neuroptera (Order) > Neuroptera (awaiting allocation) (Family)

Malacopterus
     Malacopterus Audinet-Serville, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Malacopterus Günther, 1862 accepted as Malacopterus Günther, 1862 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Labridae (Family)

Malacorhynchus
     Malacorhynchus Swainson, 1831 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Anseriformes (Order) > Anatidae (Family)
     Malacorhynchus Ménétriés, 1835 accepted as Malacorhynchus Ménétriés, 1835 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Passeriformes (awaiting allocation) (Family)

Malacosaccus
     Malacosaccus Schulze, 1887 · Animalia (Kingdom) > Porifera (Phylum) > Hexactinellida (Class) > Lyssacinosida (Order) > Euplectellidae (Family)
     Malacosaccus Schulze, 1886 · Animalia (Kingdom) > Porifera (Phylum) > Hexactinellida (Class) > Lyssacinosida (Order) > Euplectellidae (Family)

Malacosoma
     Malacosoma Hübner, 1820 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lasiocampidae (Family)
 Malacosoma Faldermann, 1837 accepted as Exosoma Jacoby, 1903 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
 Malacosoma Kopperi, 1937 accepted as Kopperia Corliss, 1960 · Chromista (Kingdom) > Ciliophora (Phylum) > Ciliophora (awaiting allocation) (Class) > Ciliophora (awaiting allocation) (Order) > Ciliophora (awaiting allocation) (Family)
 Malacosoma de Man, 1879 accepted as Hapalonotus Rathbun, 1897 (pre-occupied) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Pilumnidae (Family)
 Malacosoma Chevrolat, 1837 accepted as Exosoma Jacoby, 1903 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
     Malacosoma Dejean, 1835 accepted as Exosoma Jacoby, 1903 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Malacostroma
     Malacostroma G. Gürich, 1906 † accepted as Malacostroma G. Gürich, 1906 † (unassessed) · Bacteria (Kingdom) > Cyanobacteria (Phylum) > Cyanophyceae (Class) > Cyanophyceae (awaiting allocation) (Order) > Cyanophyceae (awaiting allocation) (Family)
 Malacostroma F. von Höhnel, 1920 accepted as Phomopsis (P.A. Saccardo) Bubák, 1905 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Diaporthales (Order) > Diaporthaceae (Family)

Malacothrix
     Malacothrix A.P. de Candolle, 1838 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
     Malacothrix Wagner in Schreber, 1843 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Rodentia (Order) > Nesomyidae (Family)

Malacurus
     Malacurus Reichenbach, 1850 accepted as Malacurus Reichenbach, 1850 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Malacurus Gloger, 1842 accepted as Malurus Vieillot, 1816 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Maluridae (Family)
 Malacurus Nevski, 1934 accepted as Leymus Hochstetter, 1848 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Poaceae (Family)

Malagasia
     Malagasia Distant, 1882 accepted as Malagasia Distant, 1882 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadidae (Family)
     Malagasia L.A.S. Johnson & B.G. Briggs, 1975 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Proteales (Order) > Proteaceae (Family)

Malala
     Malala Davies, 1993 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Amaurobiidae (Family)
     Malala Distant, 1910 accepted as Malala Distant, 1910 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Tingidae (Family)

Malania
 Malania Preston, 1913 accepted as Malania Preston, 1913 (Misspelling) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Malania Smith, 1953 accepted as Latimeria Smith, 1939 · Animalia (Kingdom) > Chordata (Phylum) > Sarcopterygii (Class) > Coelacanthiformes (Order) > Latimeriidae (Family)
     Malania Chun & S.K. Lee in S.K. Lee, 1980 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Santalales (Order) > Olacaceae (Family)

Malapterus
     Malapterus Valenciennes in Cuvier & Valenciennes, 1839 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Labridae (Family)
 Malapterus Jarocki, 1822 accepted as Malapterurus Lacepède, 1803 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Siluriformes (Order) > Malapteruridae (Family)

Malasaurus
     Malasaurus Tatarinov, 2002 † accepted as Malasaurus Tatarinov, 2002 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Therapsida (Order) > Therapsida (awaiting allocation) (Family)
 Malasaurus Malkani, 2007 † accepted as Malakhelisaurus Malkani, 2008 † · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Saurischia (Order) > Titanosauria (awaiting allocation) (Family)

Malawia
     Malawia Dirsh, 1968 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Lentulidae (Family)
 Malawia Csuzdi, 2010 accepted as Dichogaster Beddard, 1888 · Animalia (Kingdom) > Annelida (Phylum) > Oligochaeta (Class) > Haplotaxida (Order) > Octochaetidae (Family)

Malcolmia
     Malcolmia W.T. Aiton, 1812 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Brassicaceae (Family)
     Malcolmia Blyth, 1855 accepted as Malcolmia Blyth, 1855 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Malea
     Malea Valenciennes in Humboldt, 1832 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Tonnidae (Family)
     Malea Lundell, 1943 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Ericaceae (Family)

Malherbipicus
     Malherbipicus Bonaparte, 1854 accepted as Malherbipicus Bonaparte, 1854 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Malherbipicus Bonaparte, 1854 accepted as Malherbipicus Bonaparte, 1854 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Malkinella
     Malkinella Millidge, 1991 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Salticidae (Family)
     Malkinella Dybas, 1960 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ptiliidae (Family)

Malkinia
     Malkinia Millidge, 1991 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Linyphiidae (Family)
     Malkinia Usinger & Matsuda, 1959 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)

Malleolus
     Malleolus Ehrenberg, 1838 accepted as Malleolus Ehrenberg, 1838 (unassessed) · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Trematoda (awaiting allocation) (Order) > Trematoda (awaiting allocation) (Family)
 Malleolus Rafinesque, 1815 accepted as Malleus Lamarck, 1799 (synonym) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pterioida (Order) > Malleidae (Family)
 Malleolus J.E. Gray, 1847 accepted as Teredora Bartsch, 1921 (non Rafinesque, 1815) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Myoida (Order) > Teredinidae (Family)

Mallerina
     Mallerina Malaise, 1941 accepted as Mallerina Malaise, 1941 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Mallerina Malaise, 1942 accepted as Mallerina Malaise, 1942 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Mallocera
     Mallocera Audinet-Serville, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Mallocera sensu Lacordaire, 1869 accepted as Paramallocera Aurivillius, 1912 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Mallochella
     Mallochella Enderlein, 1930 accepted as Mallochella Enderlein, 1930 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Simuliidae (Family)
     Mallochella Duda, 1925 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Sphaeroceridae (Family)

Mallochia
     Mallochia J.A. von Arx & R. A Samson, 1986 · Fungi (Kingdom) > Ascomycota (Phylum) > Eurotiomycetes (Class) > Onygenales (Order) > Onygenaceae (Family)
     Mallochia Viereck, 1912 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Ichneumonidae (Family)
     Mallochia Allen, 1972 accepted as Mallochia Allen, 1972 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Tiphiidae (Family)

Mallochiola
     Mallochiola Bergroth, 1925 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Microphysidae (Family)
 Mallochiola Strand, 1932 † accepted as Deltomyza Malloch, 1931 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)

Mallodeta
     Mallodeta Butler, 1876 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Arctiidae (Family)
     Mallodeta Turner, 1922 accepted as Mallodeta Turner, 1922 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Bombycidae (Family)

Mallodon
     Mallodon Audinet-Serville, 1832 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Mallodon Lacordaire, 1869 accepted as Aplagionathus Thomson, 1860 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Mallopela
     Mallopela de Folin, 1881 accepted as Mallopela de Folin, 1881 · Protozoa (Kingdom) > (Phylum) > Protozoa (awaiting allocation) (Class) > (Order) > (Family)
     Mallopela de Folin, 1887 accepted as Mallopela de Folin, 1887 · Protozoa (Kingdom) > (Phylum) > Protozoa (awaiting allocation) (Class) > (Order) > (Family)

Mallopelmus
 Mallopelmus Alluaud, 1936 accepted as Trichillinus Straneo, 1938 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Mallopelmus Straneo, 1942 accepted as Trichillinus Straneo, 1938 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Mallophora
     Mallophora Macquart, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Asilidae (Family)
     Mallophora Endlicher, 1838 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Lamiaceae (Family)
 Mallophora Maskell, 1897 accepted as Mallococcus Maskell, 1898 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Coccidae (Family)

Mallotus
     Mallotus Cuvier, 1829 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Osmeriformes (Order) > Osmeridae (Family)
     Mallotus Loureiro, 1790 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Euphorbiaceae (Family)

Malmella
     Malmella Dognin, 1917 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Megalopygidae (Family)
 Malmella C.W. Dodge, 1933 accepted as Erioderma Fée, 1825 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Peltigerales (Order) > Pannariaceae (Family)

Malmgrenia
     Malmgrenia McIntosh, 1874 · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Phyllodocida (Order) > Polynoidae (Family)
 Malmgrenia Vainio in Räsänen, 1939 accepted as Cryptothele Th. Fries, 1866 · Fungi (Kingdom) > Ascomycota (Phylum) > Lichinomycetes (Class) > Lichinales (Order) > Lichinaceae (Family)

Malpighia
     Malpighia Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Malpighiaceae (Family)
     Malpighia Enderlein, 1912 accepted as Malpighia Enderlein, 1912 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)

Malthacus
     Malthacus Fieber, 1858 accepted as Malthacus Fieber, 1858 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Malthacus Kirby in Richardson, 1837 accepted as Podabrus Westwood, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cantharidae (Family)

Malthinellus
     Malthinellus Kiesenwetter, 1874 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cantharidae (Family)
     Malthinellus Seidlitz, 1889 accepted as Malthinellus Seidlitz, 1889 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)

Maltzania
     Maltzania Böttger, 1882 accepted as Maltzania Böttger, 1882 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Amphibia (awaiting allocation) (Order) > Amphibia (awaiting allocation) (Family)
     Maltzania Hesse, 1908 accepted as Maltzania Hesse, 1908 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Malua
     Malua Ramme, 1941 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Malua Otte & Alexander, 1983 accepted as Maluagryllus Otte, 1994 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Gryllidae (Family)

Malupa
     Malupa Y. Ono, Buriticá & J.F. Hennen, 1992 · Fungi (Kingdom) > Basidiomycota (Phylum) > Pucciniomycetes (Class) > Pucciniales (Order) > Pucciniales incertae sedis (Family)
     Malupa Schaus, 1905 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Notodontidae (Family)

Malvapion
     Malvapion Hoffmann, 1958 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)
 Malvapion Voss, 1959 accepted as Malvapion Hoffmann, 1958 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)

Malvernia
     Malvernia Jacoby, 1899 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
 Malvernia Delo, 1935 † accepted as Heliocephalus Delo, 1936 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Phacopida (Order) > Diaphanometopidae (Family)

Malvinia
     Malvinia Döbbeler, 2003 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Ostropales (Order) > Ostropales incertae sedis (Family)
     Malvinia Houben, Bijl, Guerstein, Sluijs & Brinkhuis, 2011 † · Chromista (Kingdom) > Miozoa (Phylum) > Dinophyceae (Class) > Peridiniales (Order) > Protoperidiniaceae (Family)
     Malvinia Ivanova & Neuhaus, 2009 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Drilonematida (Order) > Ungellidae (Family)

Mambara
     Mambara Bethune-Baker, 1908 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Limacodidae (Family)
 Mambara Bethune-Baker, 1908 accepted as Pistoria Hemming, 1964 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lycaenidae (Family)

Mamilla
     Mamilla Wagner, 1907 accepted as Mamilla Wagner, 1907 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Cycloneritimorpha (Order) > Helicinidae (Family)
 Mamilla Fabricius, 1823 accepted as Mammilla Schumacher, 1817 (incorrect spelling of generic name) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Naticidae (Family)
 Mamilla Scott, 1974 † accepted as Jascottella Huddleston & Haman, 1982 † · Chromista (Kingdom) > Retaria (Phylum) > Monothalamea (Class) > Astrorhizida (Order) > Stegnamminidae (Family)

Mamillaria
     Mamillaria A.T. Brongniart, 1825 † accepted as Mamillaria A.T. Brongniart, 1825 † (unassessed) · Plantae (Kingdom) > Plantae (awaiting allocation) (Phylum) > Plantae (awaiting allocation) (Class) > Plantae (awaiting allocation) (Order) > Plantae (awaiting allocation) (Family)
 Mamillaria Swainson, 1840 accepted as Polinices Montfort, 1810 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Naticidae (Family)
 Mamillaria F. Reichenbach accepted as Mammillaria A.H. Haworth, 1812 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Cactaceae (Family)

Mamma
     Mamma Mörch, 1852 accepted as Mamma Mörch, 1852 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Mamma H. Adams & A. Adams, 1853 accepted as Polinices Montfort, 1810 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Naticidae (Family)

Mammaria
     Mammaria Müller, 1776 accepted as Mammaria Müller, 1776 (unassessed) · Animalia (Kingdom) > Animalia (awaiting allocation) (Phylum) > Animalia (awaiting allocation) (Class) > Animalia (awaiting allocation) (Order) > Animalia (awaiting allocation) (Family)
     Mammaria Cesati ex Rabenhorst, 1854 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Sordariales (Order) > Lasiosphaeriaceae (Family)
 Mammaria Oken, 1815 accepted as Noctiluca Suriray, 1836 · Chromista (Kingdom) > Miozoa (Phylum) > Noctilucea (Class) > Noctilucales (Order) > Noctilucaceae (Family)

Mammea
     Mammea Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Calophyllaceae (Family)
 Mammea J.Agardh, 1841 accepted as Callophycus Trevisan, 1848 (synonym) · Plantae (Kingdom) > Rhodophyta (Phylum) > Florideophyceae (Class) > Gigartinales (Order) > Areschougiaceae (Family)

Mammilla
     Mammilla Schumacher, 1817 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Naticidae (Family)
     Mammilla Wu, 2011 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Diaspididae (Family)

Mammillaria
 Mammillaria Stackhouse, 1809 accepted as · Plantae (Kingdom) > Rhodophyta (Phylum) > Rhodophyta incertae sedis (Class) > Rhodophyceae (awaiting allocation) (Order) > Rhodophyceae (awaiting allocation) (Family)
     Mammillaria A.H. Haworth, 1812 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Cactaceae (Family)
 Mammillaria Herrmannsen, 1847 accepted as Mamillaria Swainson, 1840 (Unjustified emendation) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Naticidae (Family)

Mamoea
     Mamoea Forster & Wilton, 1973 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Amphinectidae (Family)
 Mamoea Begg & Grant-Mackie, 2003 † accepted as Mamoeatomaria Begg & Grant-Mackie, 2006 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Vetigastropoda (Order) > Pleurotomariidae (Family)

Manaia
     Manaia Finlay & Marwick, 1937 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Arcida (Order) > Arcida (awaiting allocation) (Family)
 Manaia Oliveira, 1846 accepted as Centropages Krøyer, 1849 (synonym) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Calanoida (Order) > Centropagidae (Family)

Manaria
     Manaria E. A. Smith, 1906 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Buccinidae (Family)
     Manaria Popov & Herczek, 1998 † accepted as Manaria Popov & Herczek, 1998 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Miridae (Family)

Manasichthys
     Manasichthys Su, 1980 † accepted as Manasichthys Su, 1980 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Actinopterygii (awaiting allocation) (Order) > Actinopterygii (awaiting allocation) (Family)
     Manasichthys Su Dezao, 1985 † accepted as Manasichthys Su Dezao, 1985 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Actinopterygii (awaiting allocation) (Order) > Actinopterygii (awaiting allocation) (Family)

Manati
 Manati Steller, 1774 accepted as Hydrodamalis Retzius, 1794 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Sirenia (Order) > Dugongidae (Family)
 Manati Zimmermann, 1780 accepted as Hydrodamalis Retzius, 1794 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Sirenia (Order) > Dugongidae (Family)

Manatus
 Manatus Storr, 1780 accepted as Manatus Storr, 1780 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Sirenia (Order) > Trichechidae (Family)
 Manatus Brünnich, 1772 accepted as Trichechus Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Sirenia (Order) > Trichechidae (Family)

Manawa
     Manawa Forster, 1970 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Desidae (Family)
     Manawa Hornibrook, 1949 · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Platycopida (Order) > Punciidae (Family)
 Manawa Bergquist & Fromont, 1988 accepted as Pyloderma Kirkpatrick, 1907 (junior synonym) · Animalia (Kingdom) > Porifera (Phylum) > Demospongea (Class) > Poecilosclerida (Order) > Dendoricellidae (Family)

Mancinella
     Mancinella Link, 1807 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Muricidae (Family)
 Mancinella F.R. de Tussac, 1824 accepted as Hippomane Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Euphorbiaceae (Family)

Mancipium
     Mancipium Horsfield, 1829 accepted as Mancipium Horsfield, 1829 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Mancipium Hübner, 1807 accepted as Mancipium Hübner, 1807 (Suppressed name (ICZN)) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Mancoa
     Mancoa Weddell, 1859 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Brassicaceae (Family)
 Mancoa Rafinesque, 1837 accepted as Mancoa Rafinesque, 1837 (nomen rejiciendum) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Phytolaccaceae (Family)

Mancopsetta
     Mancopsetta Gill, 1881 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Pleuronectiformes (Order) > Achiropsettidae (Family)
     Mancopsetta Jordan, 1920 accepted as Mancopsetta Jordan, 1920 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Pleuronectiformes (Order) > Achiropsettidae (Family)

Mandane
 Mandane Kinberg, 1866 accepted as Laonice Malmgren, 1867 (subjective synonym) · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Spionida (Order) > Spionidae (Family)
 Mandane Karsch, 1880 accepted as Mandaneta Strand, 1932 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Corinnidae (Family)

Mandarina
     Mandarina Eitschberger, Danner & Surholt in Danner, Surholt & Eitschberger, 1998 accepted as Mandarina Eitschberger, Danner & Surholt in Danner, Surholt & Eitschberger, 1998 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
     Mandarina Pilsbry in Tryon & Pilsbry, 1894 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Camaenidae (Family)

Mandelstamia
     Mandelstamia Ljubimova, 1955 † · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Podocopida (Order) > Loxoconchidae (Family)
     Mandelstamia Lyubimova in Lyubimova & Khabarova, 1955 † accepted as Mandelstamia Lyubimova in Lyubimova & Khabarova, 1955 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Ostracoda (awaiting allocation) (Order) > Ostracoda (awaiting allocation) (Family)

Mandera
     Mandera Ahmed, 1971 accepted as Mandera Ahmed, 1971 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadellidae (Family)
     Mandera Fauvel, 1899 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Mandonia
     Mandonia Weddell, 1864 accepted as Mandonia Weddell, 1864 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Mandonia C.H. Schultz-Bipontinus, 1865 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Mandonia Hasskarl, 1871 accepted as Tradescantia Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Commelinales (Order) > Commelinaceae (Family)

Mandragora
     Mandragora Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Solanales (Order) > Solanaceae (Family)
     Mandragora Schumacher, 1917 accepted as Mandragora Schumacher, 1917 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Mandrillus
     Mandrillus Ritgen, 1824 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Cercopithecidae (Family)
     Mandrillus Milne-Edwards in Krueger, 1841 accepted as Mandrillus Milne-Edwards in Krueger, 1841 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)

Manettia
 Manettia Boehmer in C.G. Ludwig, 1760 accepted as Selago Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Scrophulariaceae (Family)
     Manettia Mutis ex Linnaeus, 1771 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)
 Manettia Adanson, 1763 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Aizoaceae (Family)

Manfredia
     Manfredia Verhoeff, 1940 accepted as Manfredia Verhoeff, 1940 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Myriapoda (awaiting allocation) (Class) > Myriapoda (awaiting allocation) (Order) > Myriapoda (awaiting allocation) (Family)
     Manfredia Schubart, 1943 accepted as Manfredia Schubart, 1943 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Myriapoda (awaiting allocation) (Class) > Myriapoda (awaiting allocation) (Order) > Myriapoda (awaiting allocation) (Family)

Mangas
     Mangas Adanson, 1763 accepted as Mangas Adanson, 1763 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Sapindales (Order) > Anacardiaceae (Family)
     Mangas Kovalev, 1986 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Bolitophilidae (Family)

Mangilia
 Mangilia Lovén, 1846 accepted as Mangelia Risso, 1826 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Turridae (Family)
 Mangilia P. Fischer, 1883 accepted as Mangelia Risso, 1826 (unjustified emendation) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Mangeliidae (Family)

Manglesia
     Manglesia Endlicher & Fenzl, 1839 accepted as Manglesia Endlicher & Fenzl, 1839 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Proteales (Order) > Proteaceae (Family)
 Manglesia J. Lindley accepted as Beaufortia R. Brown ex W.T. Aiton, 1812 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Myrtaceae (Family)

Mangusta
     Mangusta Desmarest, 1818 accepted as Herpestes Illiger, 1811 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Herpestidae (Family)
 Mangusta Horsfield, 1822 accepted as Herpestes Illiger, 1811 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Herpestidae (Family)

Mania
     Mania Quatrefages, 1865 · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Phyllodocida (Order) > Hesionidae (Family)
     Mania Hübner, 1821 accepted as Mania Hübner, 1821 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Uraniidae (Family)
     Mania Treitschke, 1825 accepted as Mania Treitschke, 1825 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
 Mania Walter, 1935 accepted as Manotonia Viets, 1935 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Anisitsiellidae (Family)

Manica
     Manica Jurine, 1807 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Formicidae (Family)
     Manica J. Watson, 1974 † accepted as Manica J. Watson, 1974 † (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Pinopsida (Class) > Pinales (Order) > Cupressaceae (Family)

Manilkaroxylon
     Manilkaroxylon E. Hofmann, 1948 † accepted as Manilkaroxylon E. Hofmann, 1948 † (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Sapotaceae (Family)
 Manilkaroxylon N. Grambast-Fessard, 1968 † accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Sapotaceae (Family)

Manina
     Manina Adanson, 1763 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Agaricales (Order) > Clavariaceae (Family)
 Manina Banker, 1912 accepted as Hericium Persoon, 1794 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Russulales (Order) > Hericiaceae (Family)

Maniola
     Maniola Schrank, 1801 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Satyridae (Family)
 Maniola Rafinesque, 1815 accepted as Maniola Rafinesque, 1815 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Manis
     Manis Saini & Deep, 1991 accepted as Manis Saini & Deep, 1991 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Tenthredinidae (Family)
     Manis Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Pholidota (Order) > Manidae (Family)

Manistrongylus
     Manistrongylus Baer, 1959 accepted as Manistrongylus Baer, 1959 (unassessed) · Animalia (Kingdom) > Platyhelminthes (Phylum) > Cestoda (Class) > Cestoda (awaiting allocation) (Order) > Cestoda (awaiting allocation) (Family)
 Manistrongylus Cameron & Myers, 1960 accepted as Trichochenia Kou, 1958 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Rhabditida (Order) > Molineidae (Family)
 Manistrongylus Baer, 1959 accepted as Trichochenia Kou, 1958 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Rhabditida (Order) > Molineidae (Family)

Manna
 Manna D. Don, 1825 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)
     Manna Lee & Emery, 2013 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadidae (Family)

Mannia
     Mannia Dewalque, 1868 † accepted as Mannia Dewalque, 1868 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Rhynchonellida (Order) > Cryptoporidae (Family)
     Mannia Opiz, 1829 · Plantae (Kingdom) > Marchantiophyta (Phylum) > Marchantiopsida (Class) > Marchantiales (Order) > Aytoniaceae (Family)
 Mannia Trevisan, 1857 accepted as Buellia G. De Notaris, 1846 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Teloschistales (Order) > Caliciaceae (Family)
 Mannia J.D. Hooker in Bentham & J.D. Hooker, 1862 accepted as Pierreodendron Engler, 1907 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Sapindales (Order) > Simaroubaceae (Family)
 Mannia Prout in Seitz, 1915 accepted as Eumannia Fletcher, 1979 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
 Mannia Davidson, 1874 accepted as Crytopora Jeffreys, 1869 · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Rhynchonellida (Order) > Cryptoporidae (Family)
 Mannia Paramonov, 1950 accepted as Johnmannia Irwin & Lyneborg, 1989 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Therevidae (Family)

Manniella
     Manniella Wheeler, 1921 accepted as Manniella Wheeler, 1921 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Manniella H.G. Reichenbach, 1881 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)

Manningia
     Manningia Serène, 1962 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Stomatopoda (Order) > Eurysquillidae (Family)
     Manningia E.M. Friis, 1983 † · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fagales (Order) > Fagales (awaiting allocation) (Family)

Manobia
     Manobia Jacoby, 1885 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
 Manobia Staudinger, 1896 accepted as Niaboma Nye, 1975 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Manon
     Manon Schweigger, 1819 accepted as Manon Schweigger, 1819 (unassessed) · Animalia (Kingdom) > Porifera (Phylum) > Porifera (awaiting allocation) (Class) > Porifera (awaiting allocation) (Order) > Porifera (awaiting allocation) (Family)
     Manon Oken, 1815 accepted as Manon Oken, 1815 (unassessed) · Animalia (Kingdom) > Porifera (Phylum) > Porifera (awaiting allocation) (Class) > Porifera (awaiting allocation) (Order) > Porifera (awaiting allocation) (Family)

Manopora
     Manopora Wilkes, 1848 accepted as Manopora Wilkes, 1848 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
 Manopora Dana, 1846 accepted as Montipora Blainville, 1830 (synonymy) · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Scleractinia (Order) > Acroporidae (Family)

Manosia
     Manosia Zeng in Zeng, Ni, Xu, Zhou, Wang, Li, Lai & Xiang, 1983 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Spiriferida (Order) > Articulata (awaiting allocation) (Family)
     Manosia Zeng in Wang, Zeng, Zhou, Xiang, Lai, Ni, Xu, Sun & Li, 1983 † accepted as Manosia Zeng in Wang, Zeng, Zhou, Xiang, Lai, Ni, Xu, Sun & Li, 1983 † (unassessed) · Animalia (Kingdom) > Brachiopoda (Phylum) > Brachiopoda (awaiting allocation) (Class) > Brachiopoda (awaiting allocation) (Order) > Brachiopoda (awaiting allocation) (Family)

Manotes
     Manotes Kertész, 1916 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Stratiomyidae (Family)
     Manotes Solander ex J.E. Planchon, 1850 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Oxalidales (Order) > Connaraceae (Family)
     Manotes Meshkova, 1984 † · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Polychaeta (awaiting allocation) (Order) > Polychaeta incertae sedis (Family)

Mansellia
     Mansellia Tjeder, 1992 accepted as Mansellia Tjeder, 1992 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Neuroptera (Order) > Ascalaphidae (Family)
 Mansellia Cossmann, 1901 † accepted as Mansellia Cossmann, 1901 † (Misspelling) · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Ammonitida (Order) > Graphoceratidae (Family)

Mansonia
     Mansonia Blanchard, 1901 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Culicidae (Family)
     Mansonia J.R. Drummond ex D. Prain, 1905 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malvales (Order) > Malvaceae (Family)

Mansuyella
     Mansuyella Endo, 1937 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Asaphida (Order) > Asaphida (awaiting allocation) (Family)
 Mansuyella Reed, 1944 † accepted as Callispirina Cooper & Muir-Wood, 1951 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Spiriferida (Order) > Paraspiriferinidae (Family)

Mansuyia
     Mansuyia Nordsieck, 2002 accepted as Mansuyia Nordsieck, 2002 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Stylommatophora (awaiting allocation) (Family)
     Mansuyia Sun, 1925 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Corynexochida (Order) > Shirakiellidae (Family)

Mantellia
     Mantellia Parkinson, 1822 accepted as Mantellia Parkinson, 1822 (unassessed) · Animalia (Kingdom) > Porifera (Phylum) > Porifera (awaiting allocation) (Class) > Porifera (awaiting allocation) (Order) > Porifera (awaiting allocation) (Family)
 Mantellia A.T. Brongniart, 1828 † accepted as Cycadeoidea W. Buckland ex Lindley & W. Hutton, 1832 † (nom. rej. prop.) · Plantae (Kingdom) > Tracheophyta (Phylum) > Cycadopsida (Class) > Cycadeoideales (Order) > Cycadeoideaceae (Family)

Mantellum
     Mantellum P.[J.L.] Dangeard, 1941 · Bacteria (Kingdom) > Cyanobacteria (Phylum) > Cyanophyceae (Class) > Synechococcales (Order) > Merismopediaceae (Family)
 Mantellum Röding, 1798 accepted as Lima Bruguière, 1797 (synonym) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Limoida (Order) > Limidae (Family)

Mantichora
     Mantichora Gistl, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Mantichora Latreille in Latreille & Dejean, 1822 accepted as Manticora Fabricius, 1781 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Manticora
     Manticora Fabricius, 1781 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Manticora Panzer, 1803 accepted as Leistus Frölich, 1799 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Mantis
     Mantis Linnaeus, 1758 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Mantodea (Order) > Mantidae (Family)
 Mantis Linnaeus, 1767 accepted as Mantis Linnaeus, 1758 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Mantodea (Order) > Mantidae (Family)

Manulea
     Manulea Wallengren, 1863 accepted as Manulea Wallengren, 1863 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Arctiidae (Family)
     Manulea Linnaeus, 1767 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Scrophulariaceae (Family)

Manus
 Manus accepted as Manis Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Pholidota (Order) > Manidae (Family)
     Manus Blakemore, 2010 · Animalia (Kingdom) > Annelida (Phylum) > Oligochaeta (Class) > Haplotaxida (Order) > Megascolecidae (Family)

Manzonia
     Manzonia Pomel, 1883 accepted as Manzonia Pomel, 1883 (unassessed) · Animalia (Kingdom) > Echinodermata (Phylum) > Echinodermata (awaiting allocation) (Class) > Echinodermata (awaiting allocation) (Order) > Echinodermata (awaiting allocation) (Family)
     Manzonia Brusina, 1870 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Rissoidae (Family)
     Manzonia Giattini, 1904 † accepted as Manzonia Giattini, 1904 † (unassessed) · Animalia (Kingdom) > Porifera (Phylum) > Porifera (awaiting allocation) (Class) > Porifera (awaiting allocation) (Order) > Porifera (awaiting allocation) (Family)
 Manzonia Garovaglio, 1866 accepted as Aspicilia A. Massalongo, 1852 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Pertusariales (Order) > Megasporaceae (Family)

Maopingaspis
     Maopingaspis Lin & Yin in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 † accepted as Maopingaspis Lin & Yin in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)
     Maopingaspis Lin & Yin, 1978 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Redlichiida (Order) > Chengkouaspidae (Family)

Maoria
     Maoria Warren in Seitz, 1912 accepted as Maoria Warren in Seitz, 1912 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
 Maoria Pilsbry, 1892 accepted as Maoria Pilsbry, 1892 (Unjustified (?) emendation) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Maoria Laporte, 1867 accepted as Metaglymma Bates, 1867 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Maoria Cameron, 1945 accepted as Makara Cameron, 1948 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Maoria Franz, 1975 accepted as Maorinus Franz, 1980 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Maoriana
     Maoriana Hogg, 1901 accepted as Maoriana Hogg, 1901 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Idiopidae (Family)
     Maoriana Suter, 1891 accepted as Maoriana Suter, 1891 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Maoricolpus
     Maoricolpus Finlay, 1926 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sorbeoconcha (Order) > Turritellidae (Family)
     Maoricolpus Allan, 1927 accepted as Maoricolpus Finlay, 1926 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sorbeoconcha (Order) > Turritellidae (Family)

Maoriella
     Maoriella Attems, 1903 · Animalia (Kingdom) > Arthropoda (Phylum) > Chilopoda (Class) > Geophilida (Order) > Geophilidae (Family)
 Maoriella Obenberger, 1924 accepted as Maoraxia Obenberger, 1937 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)

Maorina
 Maorina Pilsbry, 1892 accepted as Maorina Pilsbry, 1892 (Unjustified (?) emendation) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Maorina Malloch, 1930 accepted as Neomaorina Miller, 1945 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Pallopteridae (Family)

Maoutia
     Maoutia Weddell, 1854 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Rosales (Order) > Urticaceae (Family)
 Maoutia Montrouzier, 1860 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Verbenaceae (Family)

Mapa
     Mapa Vellozo, 1829 accepted as Mapa Vellozo, 1829 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Phytolaccaceae (Family)
     Mapa Strand, 1911 accepted as Mapa Strand, 1911 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Mapania
     Mapania Aublet, 1775 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Cyperaceae (Family)
     Mapania Resser & Endo in Kobayashi, 1935 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Asaphida (Order) > Anomocaridae (Family)

Mapea
 Mapea Patouillard, 1906 accepted as Uredo Persoon, 1801 · Fungi (Kingdom) > Basidiomycota (Phylum) > Pucciniomycetes (Class) > Pucciniales (Order) > Pucciniales incertae sedis (Family)
 Mapea Boedijn, 1957 accepted as Telomapea G.F. Laundon, 1967 · Fungi (Kingdom) > Basidiomycota (Phylum) > Pucciniomycetes (Class) > Pucciniales (Order) > Chaconiaceae (Family)

Mapinguari
     Mapinguari Papavero & Wilcox, 1974 accepted as Mapinguari Papavero & Wilcox, 1974 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
     Mapinguari G. Carnevali & R.B. Singer, 2007 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)

Mappia
     Mappia N.J. Jacquin, 1797 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Icacinales (Order) > Icacinaceae (Family)
 Mappia Heister ex Fabricius, 1759 accepted as Mappia Heister ex Fabricius, 1759 (nomen rejiciendum) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Lamiaceae (Family)
 Mappia Schreber, 1791 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Dilleniales (Order) > Dilleniaceae (Family)

Mapuchea
     Mapuchea Szwedo, 2004 accepted as Mapuchea Szwedo, 2004 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Myerslopiidae (Family)
     Mapuchea M. Serrano, R. Carbajal & S. Ortiz in M. Serrano, R. Carbajal, A. Pereira Coutinho & S. Ortiz, 2016 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Boraginales (Order) > Boraginaceae (Family)

Maraca
     Maraca Pérez-Miles, 2005 accepted as Maraca Pérez-Miles, 2005 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Theraphosidae (Family)
     Maraca Hebard, 1926 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Blattodea (Order) > Blattellidae (Family)

Maraga
     Maraga Gorochov, 1986 † accepted as Maraga Gorochov, 1986 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Haglidae (Family)
 Maraga Walker, 1858 accepted as Orthogonius Macleay, 1825 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Marama
     Marama Marwick, 1927 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Veneridae (Family)
     Marama Rafinesque, 1838 accepted as Marama Rafinesque, 1838 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Acanthaceae (Family)

Marangua
     Marangua Delucchi, 1962 accepted as Marangua Delucchi, 1962 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Marangua Lindner, 1960 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Stratiomyidae (Family)

Marathrum
     Marathrum Bonpland in Humboldt & Bonpland, 1806 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Podostemaceae (Family)
 Marathrum Link, 1829 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Apiales (Order) > Apiaceae (Family)
 Marathrum Rafinesque, 1819 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Apiales (Order) > Apiaceae (Family)

Marcellia
     Marcellia C.F.P. Martius ex J.D. Choisy, 1844 accepted as Marcellia C.F.P. Martius ex J.D. Choisy, 1844 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Solanales (Order) > Convolvulaceae (Family)
 Marcellia Baillon, 1886 accepted as Marcelliopsis Schinz in Engler & Prantl, 1934 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Amaranthaceae (Family)

Marcetia
     Marcetia Petter, 1967 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Mustelidae (Family)
     Marcetia A.P. de Candolle, 1828 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Melastomataceae (Family)

Marcgravia
     Marcgravia Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Marcgraviaceae (Family)
 Marcgravia Jordan, 1887 accepted as Amphichthys Swainson, 1839 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Batrachoidiformes (Order) > Batrachoididae (Family)

Marchaliella
     Marchaliella Bodenheimer, 1951 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Diaspididae (Family)
 Marchaliella G. Winter ex E. Bommer & M. Rousseau, 1891 accepted as Testudina Bizzozero, 1885 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Pleosporales (Order) > Testudinaceae (Family)

Marchantiopsis
     Marchantiopsis C.I. Douin & R.C. Douin, 1918 · Plantae (Kingdom) > Marchantiophyta (Phylum) > Marchantiopsida (Class) > Marchantiales (Order) > Marchantiaceae (Family)
 Marchantiopsis C.H. Gao & K.C. Chang, 1982 accepted as · Plantae (Kingdom) > Marchantiophyta (Phylum) > Marchantiopsida (Class) > Marchantiales (Order) > Marchantiaceae (Family)

Marchantites
     Marchantites A.T. Brongniart in A.C.V.D. d'Orbigny, 1849 † · Plantae (Kingdom) > Marchantiophyta (Phylum) > Marchantiopsida (Class) > Marchantiales (Order) > Marchantiales (awaiting allocation) (Family)
 Marchantites G.F. Bukreeva in Anonymous, 1966 † accepted as · Plantae (Kingdom) > Sporae dispersae (Phylum) > (Class) > (Order) > (Family)

Marcia
     Marcia H. Adams & A. Adams, 1857 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Veneridae (Family)
 Marcia Warlow, 1833 accepted as Marcia Warlow, 1833 (Misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Anseriformes (Order) > Anatidae (Family)
 Marcia Koch, 1836 accepted as Frontipoda Koenike, 1891 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Oxidae (Family)

Marconia
     Marconia G.E. Mattei, 1921 accepted as Marconia G.E. Mattei, 1921 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malvales (Order) > Malvaceae (Family)
     Marconia Bourguignat, 1889 accepted as Marconia Bourguignat, 1889 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Streptaxidae (Family)

Marcuinomys
     Marcuinomys Lavocat, 1951 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Lagomorpha (Order) > Ochotonidae (Family)
 Marcuinomys Croizet in Gervais, 1848-52 † accepted as Marcuinomys Lavocat, 1951 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Lagomorpha (Order) > Ochotonidae (Family)

Marcusia
     Marcusia Artois & Schockaert, 1998 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Turbellaria (Class) > Rhabdocoela (Order) > Polycystididae (Family)
     Marcusia Hyman, 1953 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Turbellaria (Class) > Polycladida (Order) > Anonymidae (Family)

Mardara
     Mardara Walker, 1865 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lymantriidae (Family)
     Mardara Walker, 1858 accepted as Mardara Walker, 1858 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Mareda
     Mareda Walker, 1855 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Limacodidae (Family)
     Mareda Kobayashi, 1942 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)

Maresia
     Maresia Bourguignat, 1876 accepted as Maresia Bourguignat, 1876 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Maresia Pomel, 1874 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Brassicaceae (Family)
 Maresia Cameron, 1947 accepted as Anebolura Bernhauer, 1922 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
     Maresia Walker, 1866 accepted as Maresia Walker, 1866 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Maresia Fresi, 1982 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Isopoda incertae sedis (Family)

Margana
     Margana Walker, 1865 accepted as Margana Walker, 1865 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Margana DeLong, 1942 accepted as Marganana DeLong, 1948 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadellidae (Family)

Margaraster
 Margaraster Gray, 1866 accepted as Uniophora Gray, 1840 (synonym) · Animalia (Kingdom) > Echinodermata (Phylum) > Asteroidea (Class) > Forcipulatida (Order) > Asteriidae (Family)
 Margaraster Hutton, 1872 accepted as Astrostole Fisher, 1923 · Animalia (Kingdom) > Echinodermata (Phylum) > Asteroidea (Class) > Forcipulatida (Order) > Asteriidae (Family)

Margaretopora
     Margaretopora Tchi, 1987 † accepted as Margaretopora Tchi, 1987 † (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Anthozoa (awaiting allocation) (Order) > Anthozoa (awaiting allocation) (Family)
     Margaretopora Tchi in Lin & Yan, 1988 † accepted as Margaretopora Tchi in Lin & Yan, 1988 † (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Tabulata (Order) > Tabulata (awaiting allocation) (Family)

Margaretta
     Margaretta Gray in Dieffenbach, 1843 · Animalia (Kingdom) > Bryozoa (Phylum) > Gymnolaemata (Class) > Cheilostomatida (Order) > Margarettidae (Family)
     Margaretta D. Oliver, 1875 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Apocynaceae (Family)

Margaris
     Margaris Schaufuss, 1877 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
     Margaris A.P. de Candolle, 1830 accepted as Margaris A.P. de Candolle, 1830 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Dipsacales (Order) > Caprifoliaceae (Family)
 Margaris A.H.R. Grisebach, 1866 accepted as Margaritopsis C. Wright in Sauvalle, 1869 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)

Margarita
     Margarita Lea, 1836 accepted as Margarita Lea, 1836 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Margarita Lea, 1838 accepted as Margarita Lea, 1838 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Margarita Gaudin, 1829 accepted as Margarita Gaudin, 1829 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Margarita Leach, 1814 accepted as Pinctada Röding, 1798 (synonym) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pterioida (Order) > Pteriidae (Family)
 Margarita Wilson & Szalay, 1976 † accepted as Mahgarita Wilson & Szalay, 1977 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Adapidae (Family)
 Margarita Leach in Ross, 1819 accepted as Margarites Gray, 1847 (Invalid: junior homonym of Margarita Leach, 1814 [Bivalvia, Pteriidae]) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Vetigastropoda incertae sedis (Order) > Margaritidae (Family)
 Margarita A. Lister, 1894 accepted as Calomyxa Nieuwland, 1916 · Protozoa (Kingdom) > Amoebozoa (Phylum) > Myxogastrea (Class) > Trichiida (Order) > Dianemidae (Family)

Margaritaria
     Margaritaria Linnaeus f., 1782 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Phyllanthaceae (Family)
     Margaritaria Conrad, 1849 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Anomalodesmata (Order) > Pholadomyacidae (Family)

Margaritella
     Margaritella Meek & Hayden, 1860 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neotaenioglossa (Order) > Neotaenioglossa (awaiting allocation) (Family)
 Margaritella Thiele in Troschel, 1891 accepted as Margarella Thiele in Troschel, 1893 (Invalid: junior homonym of Margaritella Meek & Hayden, 1860; Margarella is a replacement name) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Vetigastropoda (Order) > Calliostomatidae (Family)
 Margaritella Schmidt, 1880 accepted as Iphiteon Bowerbank, 1869 (junior synonym) · Animalia (Kingdom) > Porifera (Phylum) > Hexactinellida (Class) > Lychniscosida (Order) > Dactylocalycidae (Family)
 Margaritella Caudri, 1974 † accepted as Caudriella Haman & Huddleston, 1984 † (junior homonym of Margaritella Meek & Hayden, 1860) · Chromista (Kingdom) > Retaria (Phylum) > Globothalamea (Class) > Rotaliida (Order) > Lepidocyclinidae (Family)

Margarites
     Margarites Gray, 1847 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Vetigastropoda incertae sedis (Order) > Margaritidae (Family)
 Margarites Mojsisovics, 1893 † accepted as Hoplotropites Spath, 1929 † · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Ceratitida (Order) > Tropitidae (Family)
     Margarites Mojsisovics, 1889 † accepted as Hoplotropites Spath, 1929 † · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Ceratitida (Order) > Tropitidae (Family)

Margaritifera
     Margaritifera Schumacher, 1815 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Unionoida (Order) > Margaritiferidae (Family)
 Margaritifera Jameson, 1901 accepted as Pinctada Röding, 1798 (Attributed by Jameson to Browne, 1756 [pre-Linnean work; not ì available for nomenclature]. Invalid: junior homonym of ì Margaritifera Schumacher, 1816 [Margaritiferidae].) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pterioida (Order) > Pteriidae (Family)

Margaritites
     Margaritites Agassiz, 1845 accepted as Margaritites Agassiz, 1845 · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Margaritites Gesner, 1758 † accepted as (unavailable name (suppressed work)) · Animalia (Kingdom) > Animalia (awaiting allocation) (Phylum) > Animalia (awaiting allocation) (Class) > Animalia (awaiting allocation) (Order) > Animalia (awaiting allocation) (Family)

Margaritopsis
     Margaritopsis C. Wright in Sauvalle, 1869 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)
     Margaritopsis Thiele, 1906 accepted as Margaritopsis Thiele, 1906 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Margarodes
     Margarodes Sandberger, 1842 accepted as Margarodes Sandberger, 1842 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
     Margarodes Guilding, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Margarodidae (Family)
     Margarodes Guenée, 1854 accepted as Margarodes Guenée, 1854 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Marginaria
     Marginaria Roemer, 1840 † · Animalia (Kingdom) > Bryozoa (Phylum) > Gymnolaemata (Class) > Cheilostomatida (Order) > Calloporidae (Family)
 Marginaria A. Richard in Dumont d'Urville, 1832 accepted as Marginariella Tandy, 1936 (synonym) · Chromista (Kingdom) > Ochrophyta (Phylum) > Phaeophyceae (Class) > Fucales (Order) > Seirococcaceae (Family)
 Marginaria Bory de St.-Vincent, 1824 accepted as Polypodium Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Polypodiopsida (Class) > Polypodiales (Order) > Polypodiaceae (Family)

Marginaster
     Marginaster Perrier, 1881 · Animalia (Kingdom) > Echinodermata (Phylum) > Asteroidea (Class) > Spinulosida (Order) > Poraniidae (Family)
     Marginaster Haude, 1995 † accepted as Marginaster Haude, 1995 † (unassessed) · Animalia (Kingdom) > Echinodermata (Phylum) > Stelleroidea (Class) > Stelleroidea (awaiting allocation) (Order) > Stelleroidea (awaiting allocation) (Family)

Marginella
     Marginella Mishina, 1972 † accepted as Marginella Mishina, 1972 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Ostracoda (awaiting allocation) (Order) > Ostracoda (awaiting allocation) (Family)
     Marginella Lamarck, 1799 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Marginellidae (Family)
 Marginella Renier, 1807 accepted as Marginella Renier, 1807 (Published in a rejected work (ICZN)) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Bivalvia (awaiting allocation) (Order) > Bivalvia (awaiting allocation) (Family)
     Marginella Gemmellaro, 1897 accepted as Marginella Gemmellaro, 1897 · Animalia (Kingdom) > Brachiopoda (Phylum) > Brachiopoda (awaiting allocation) (Class) > Brachiopoda (awaiting allocation) (Order) > Brachiopoda (awaiting allocation) (Family)

Marginopteris
 Marginopteris K.Z. Salmenova, 1978 † accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Pteridospermopsida (Class) > Peltaspermales (Order) > Peltaspermales (awaiting allocation) (Family)
     Marginopteris W. Gothan, 1941 † accepted as Marginopteris W. Gothan, 1941 † (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Polypodiopsida (Class) > Polypodiidae (awaiting allocation) (Order) > Polypodiidae (awaiting allocation) (Family)

Marginula
 Marginula Link, 1830 accepted as Marginulina d'Orbigny, 1826 · Chromista (Kingdom) > Retaria (Phylum) > Globothalamea (Class) > Lagenida (Order) > Vaginulinidae (Family)
 Marginula Aradas, 1846-7 accepted as Emarginula Lamarck, 1801 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Vetigastropoda (Order) > Fissurellidae (Family)

Marginulinella
 Marginulinella Wedekind, 1937 accepted as Marginulina d'Orbigny, 1826 (Opinion of Loeblich & Tappan, 1987) · Chromista (Kingdom) > Retaria (Phylum) > Globothalamea (Class) > Lagenida (Order) > Vaginulinidae (Family)
 Marginulinella Sosnina, 1967 † accepted as Calvezina de Civrieux & Dessauvagie, 1965 † (Opinion of Loeblich & Tappan, 1987) · Chromista (Kingdom) > Retaria (Phylum) > Globothalamea (Class) > Lagenida (Order) > Robuloididae (Family)

Marginura
     Marginura Sellnick, 1926 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Oplitidae (Family)
     Marginura Haude, 1999 † accepted as Marginura Haude, 1999 † (unassessed) · Animalia (Kingdom) > Echinodermata (Phylum) > Stelleroidea (Class) > Stelleroidea (awaiting allocation) (Order) > Stelleroidea (awaiting allocation) (Family)

Margites
     Margites Gahan, 1891 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Margites Druce, 1891 accepted as Margitesia Strand, 1935 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Margus
     Margus Dejean, 1834 accepted as Margus Dejean, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Margus Dallas, 1851 accepted as Althos Kirkaldy, 1904 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Coreidae (Family)
 Margus Redtenbacher, 1842 accepted as Tribolium Macleay, 1825 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Maria
     Maria Bigot, 1859 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Platystomatidae (Family)
     Maria I.A. Dobruskina, 1980 † accepted as Maria I.A. Dobruskina, 1980 † (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Pteridospermopsida (Class) > Peltaspermales (Order) > Peltaspermaceae (Family)
     Maria Giglioli, 1897 accepted as Maria Giglioli, 1897 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Maria M.D.M. Vianna Filho, 2013 accepted as Hijmania M.D.M. Vianna Filho in Vianna Filho et al., 2016 (junior homonym) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Rosales (Order) > Moraceae (Family)

Mariaella
     Mariaella Szelegiewicz, 1961 accepted as Mariaella Szelegiewicz, 1961 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Aphididae (Family)
     Mariaella Gray, 1855 accepted as Mariaella Gray, 1855 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Mariaella J. Sutara, 1987 accepted as Boletus E.M. Fries, 1821 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Boletales (Order) > Boletaceae (Family)

Mariana
 Mariana J. Hill, 1762 accepted as Mariana J. Hill, 1762 (nomen rejiciendum) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
     Mariana Locard, 1889 accepted as Mariana Locard, 1889 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Mariana Quoy & Gaimard, 1825 accepted as Mariana Quoy & Gaimard, 1825 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Urochordata (awaiting allocation) (Class) > Urochordata (awaiting allocation) (Order) > Urochordata (awaiting allocation) (Family)
 Mariana Pruvot-Fol, 1930 accepted as Marianina Pruvot-Fol, 1931 (Invalid: junior homonym of Mariana Quoy & Gaimard, 1825; Marianina is a replacement name) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Nudibranchia (Order) > Tritoniidae (Family)
 Mariana Tutt, 1907 accepted as Paraplatyptilia Bigot & Picard, 1986 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Pterophoridae (Family)

Mariania
     Mariania Airaghi, 1901 † · Animalia (Kingdom) > Echinodermata (Phylum) > Echinoidea (Class) > Spatangoida (Order) > Maretiidae (Family)
     Mariania Rebel, 1937 accepted as Mariania Rebel, 1937 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Marica
 Marica Swainson, 1837 accepted as Marica Swainson, 1837 (Misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Anseriformes (Order) > Anatidae (Family)
     Marica Hübner, 1819 accepted as Marica Hübner, 1819 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Marica Koch, 1836 accepted as Oxus Kramer, 1877 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Oxidae (Family)
 Marica J.B. Ker Gawler, 1803 accepted as Neomarica Sprague, 1928 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Iridaceae (Family)
 Marica Schreber, 1789 accepted as Cipura Aublet, 1775 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Iridaceae (Family)

Maricaona
     Maricaona Caldwell in Caldwell & Martorell, 1952 accepted as Maricaona Caldwell in Caldwell & Martorell, 1952 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadellidae (Family)
     Maricaona Razowski & Becker, 2007 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Tortricidae (Family)

Mariella
 Mariella Mörch, 1865 accepted as Mariella Mörch, 1865 (Misspelling) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Mariella Soyka, 1950 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Mymaridae (Family)
     Mariella Zalesskii, 1955 † accepted as Mariella Zalesskii, 1955 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Orthoptera (awaiting allocation) (Family)
     Mariella Nowak, 1916 † · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Ammonitida (Order) > Turrilitidae (Family)
 Mariella Dain in Bykova et al., 1958 † accepted as Dainita Loeblich & Tappan, 1964 † (Junior homonym of Mariella Nowak, 1916) · Chromista (Kingdom) > Retaria (Phylum) > Globothalamea (Class) > Lagenida (Order) > Glandulinidae (Family)
     Mariella Tikhomirova, 1989 † accepted as Mariella Tikhomirova, 1989 † (unassessed) · Protozoa (Kingdom) > (Phylum) > (Class) > Sarcomastigota (awaiting allocation) (Order) > Sarcomastigota (awaiting allocation) (Family)

Marikellia
     Marikellia Iredale, 1936 accepted as Marikellia Iredale, 1936 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Kelliidae (Family)
 Marikellia Cotton & Godfrey, 1938 accepted as Scintillula Jousseaume, 1888 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Kelliidae (Family)

Marikina
 Marikina Lesson, 1840 accepted as Saguinus Hoffmannsegg, 1807 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Cebidae (Family)
     Marikina Gray, 1843 accepted as Leontopithecus Lesson, 1840 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Cebidae (Family)
 Marikina Reichenbach, 1863 accepted as Leontopithecus Lesson, 1840 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Cebidae (Family)

Marikovskiana
     Marikovskiana Fedotova, 1993 accepted as Marikovskiana Fedotova, 1993 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Cecidomyiidae (Family)
     Marikovskiana Fedotova, 1992 accepted as Marikovskiana Fedotova, 1992 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Cecidomyiidae (Family)

Marila
     Marila Oken, 1817 accepted as Marila Oken, 1817 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Anseriformes (Order) > Anatidae (Family)
     Marila O. Swartz, 1788 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Calophyllaceae (Family)

Marilynia
     Marilynia Lehtinen, 1967 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Dictynidae (Family)
 Marilynia Hopper, 1972 accepted as Marylynnia (Hopper, 1972) Hopper, 1977 (preoccupied) · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Chromadorida (Order) > Cyatholaimidae (Family)

Marinella
     Marinella J. Pfender, 1939 † accepted as Marinella J. Pfender, 1939 † (unassessed) · Plantae (Kingdom) > Algae (awaiting allocation) (Phylum) > Algae (awaiting allocation) (Class) > Algae (awaiting allocation) (Order) > Algae (awaiting allocation) (Family)
     Marinella Ruttner-Kolisko, 1955 accepted as Marinella Ruttner-Kolisko, 1955 (unassessed) · Animalia (Kingdom) > Gastrotricha (Phylum) > Gastrotricha (awaiting allocation) (Class) > Gastrotricha (awaiting allocation) (Order) > Gastrotricha (awaiting allocation) (Family)

Marinellia
     Marinellia Riedl, 1954 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Turbellaria (Class) > Neorhabdocoela (Order) > Typhloplanidae (Family)
     Marinellia Bubani, 1897 accepted as Marinellia Bubani, 1897 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Scrophulariaceae (Family)

Mariona
 Mariona Stempell, 1909 accepted as Nosema Nägeli, 1857 · Protozoa (Kingdom) > Microsporidia (Phylum) > Minisporea (Class) > Microsporida (Order) > Nosematidae (Family)
 Mariona G. B. Sowerby III, 1890 accepted as Fulmentum P. Fischer, 1884 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Pseudolividae (Family)

Marionella
     Marionella F.S. Wagner, 1954 · Plantae (Kingdom) > Rhodophyta (Phylum) > Florideophyceae (Class) > Ceramiales (Order) > Delesseriaceae (Family)
 Marionella Bancroft, 1928 † accepted as Multicostella Schuchert & Cooper, 1931 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Orthida (Order) > Plaesiomyidae (Family)
 Marionella Cobb, 1922 accepted as Eurystomina Filipjev, 1921 · Animalia (Kingdom) > Nematoda (Phylum) > Enoplea (Class) > Oncholaimida (Order) > Enchelidiidae (Family)

Marionia
     Marionia Vayssière, 1877 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Nudibranchia (Order) > Tritoniidae (Family)
 Marionia Michaelsen, 1889 accepted as Marionina Michaelsen in Pfeffer, 1890 (Synonym) · Animalia (Kingdom) > Annelida (Phylum) > Oligochaeta (Class) > Haplotaxida (Order) > Enchytraeidae (Family)

Marioniscus
     Marioniscus Barnard, 1932 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Scyphacidae (Family)
 Marioniscus Brian, 1951 accepted as Finaloniscus Brian, 1951 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Trichoniscidae (Family)

Mariottia
     Mariottia † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Gastropoda (awaiting allocation) (Order) > Gastropoda (awaiting allocation) (Family)
     Mariottia A. Guiggi, 2016 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Cactaceae (Family)

Maripa
     Maripa Descamps & Amedegnato, 1970 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Eumastacidae (Family)
     Maripa Aublet, 1775 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Solanales (Order) > Convolvulaceae (Family)
     Maripa Soula, 2002 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Mariposa
     Mariposa Reichenbach, 1862 accepted as Mariposa Reichenbach, 1862 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Mariposa (A. Wood) Hoover, 1944 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Liliales (Order) > Liliaceae (Family)

Marisba
     Marisba Walker, 1863 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Pyralidae (Family)
     Marisba Walker, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Oecophoridae (Family)

Marisca
     Marisca Gray, 1840 accepted as Marisca Gray, 1840 · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Marisca Gistl, 1848 accepted as Cossypha Vigors, 1825 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Muscicapidae (Family)
 Marisca Pomel, 1872 † accepted as Moretispongia Breistroffer, 1949 † · Animalia (Kingdom) > Porifera (Phylum) > Demospongea (Class) > Lithistida (Order) > Lithistida (awaiting allocation) (Family)

Mariscus
 Mariscus J. Gaertner, 1788 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Cyperaceae (Family)
 Mariscus Scopoli, 1754 accepted as Mariscus Scopoli, 1754 (nomen rejiciendum) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Cyperaceae (Family)
 Mariscus M. Vahl, 1805 accepted as Cyperus Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Cyperaceae (Family)

Marissa
     Marissa Walker, 1854 accepted as Marissa Walker, 1854 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Marissa Menke, 1830 accepted as Marisa Gray, 1824 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Architaenioglossa (Order) > Ampullariidae (Family)

Markhamia
     Markhamia Seemann ex Baillon, 1888 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Bignoniaceae (Family)
     Markhamia Haman, 1988 † accepted as Markhamia Haman, 1988 † (unassessed) · Protozoa (Kingdom) > (Phylum) > (Class) > Sarcomastigota (awaiting allocation) (Order) > Sarcomastigota (awaiting allocation) (Family)

Markia
     Markia White in Richardson, 1862 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)
     Markia Razowski, 1999 accepted as Markia Razowski, 1999 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Tortricidae (Family)

Marleyia
     Marleyia Distant, 1909 accepted as Marleyia Distant, 1909 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Ricaniidae (Family)
 Marleyia Burton, 1931 accepted as Clathria Schmidt, 1862 (junior synonym) · Animalia (Kingdom) > Porifera (Phylum) > Demospongea (Class) > Poecilosclerida (Order) > Microcionidae (Family)

Marlina
 Marlina Grey, 1928 accepted as Tetrapturus Rafinesque, 1810 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Istiophoridae (Family)
 Marlina Hirasaka & Nakamura, 1947 accepted as Makaira Lacepède, 1802 (synonym) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Istiophoridae (Family)

Marmaroplegma
     Marmaroplegma Wallengren, 1865 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Eupterotidae (Family)
     Marmaroplegma Wallengren, 1860 accepted as Marmaroplegma Wallengren, 1865 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Eupterotidae (Family)

Marmessus
     Marmessus Hübner, 1819 accepted as Marmessus Hübner, 1819 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Marmessus Stål, 1864 accepted as Marmessus Stål, 1864 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Marmosa
     Marmosa Gray, 1821 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Didelphimorphia (Order) > Didelphidae (Family)
     Marmosa Rafinesque, 1815 † accepted as Marmosa Gray, 1821 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Didelphimorphia (Order) > Didelphidae (Family)

Maroa
     Maroa Barnes & McDunnough, 1914 accepted as Maroa Barnes & McDunnough, 1914 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Maroa Otte & Alexander, 1983 accepted as Yarabina Otte, 1994 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Mogoplistidae (Family)

Maroantsetra
     Maroantsetra Théry, 1937 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)
     Maroantsetra Villiers, 1962 accepted as Maroantsetra Villiers, 1962 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Reduviidae (Family)

Marosia
 Marosia Moore, 1898 & 1899 accepted as Pantoporia Hübner, 1819 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Nymphalidae (Family)
 Marosia Beaufort, 1925 accepted as Marosichthys Whitely, 1951 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Tetraodontiformes (Order) > Tetraodontiformes (awaiting allocation) (Family)

Marpesia
     Marpesia Hübner, 1818 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Nymphalidae (Family)
     Marpesia Menge, 1876 accepted as Marpesia Menge, 1876 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Arachnida (awaiting allocation) (Order) > Arachnida (awaiting allocation) (Family)

Marpessa
     Marpessa Gray, 1821 accepted as Marpessa Gray, 1821 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Clausiliidae (Family)
 Marpessa Thorell, 1870 accepted as Marpissa Koch, 1846 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Salticidae (Family)

Marquartia
     Marquartia Hasskarl, 1842 accepted as Marquartia Hasskarl, 1842 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Pandanales (Order) > Pandanaceae (Family)
 Marquartia J.R. Th. Vogel, 1843 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)

Marquesia
     Marquesia Osborn, 1935 accepted as Marquesia Osborn, 1935 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Marquesia Schaeffer in Antunes & Thomson, 1990 † accepted as Marquesia Schaeffer in Antunes & Thomson, 1990 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Actinopterygii (awaiting allocation) (Order) > Actinopterygii (awaiting allocation) (Family)
     Marquesia Gilg, 1908 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malvales (Order) > Dipterocarpaceae (Family)
     Marquesia Malloch, 1932 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Drosophilidae (Family)

Marquetia
     Marquetia Reichenbach, 1862 accepted as Marquetia Reichenbach, 1862 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Marquetia Ribaut, 1905 accepted as Marquetia Ribaut, 1905 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Diplopoda (Class) > Chordeumatida (Order) > Opisthocheiridae (Family)

Marrubiastrum
     Marrubiastrum Séguier, 1754 accepted as Marrubiastrum Séguier, 1754 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Lamiaceae (Family)
 Marrubiastrum Moench, 1794 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Lamiaceae (Family)

Marsaisia
     Marsaisia Hupé, 1952 † accepted as Marsaisia Hupé, 1952 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)
     Marsaisia Hupé, 1953 † accepted as Marsaisia Hupé, 1953 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)

Marschallia
 Marschallia J.F. Gmelin, 1791 accepted as Marschallia J.F. Gmelin, 1791 (Misspelling) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Salicaceae (Family)
 Marschallia F.G. Bartling, 1830 accepted as Marshallia Schreber, 1791 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Marsenia
     Marsenia Wood, 1842 accepted as Marsenia Wood, 1842 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Marsenia Oken, 1823 accepted as Lamellaria Montagu, 1816 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Velutinidae (Family)

Marseulia
     Marseulia de Joannis, 1866 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
 Marseulia Péringuey, 1888 accepted as Monoplius Lacordaire, 1854 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Histeridae (Family)

Marshallena
     Marshallena Allan, 1927 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Turridae (Family)
     Marshallena Finlay, 1926 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Horaiclavidae (Family)

Marshallia
     Marshallia Schreber, 1791 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Marshallia J.F. Gmelin, 1791 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Salicaceae (Family)
     Marshallia Zittel, 1878 † · Animalia (Kingdom) > Porifera (Phylum) > Hexactinellida (Class) > Lychniscosida (Order) > Lychniscosa (awaiting allocation) (Family)
 Marshallia Doherty, 1889 accepted as Eooxylides Doherty, 1889 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lycaenidae (Family)
 Marshallia Gordeeva, 1980 accepted as Gozmanyina Balogh & Mahunka, 1983 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Oribatida (Order) > Cosmochthoniidae (Family)
 Marshallia Nie & Cheng, 1947 accepted as Niemarshallia Corliss, 1960 (synonym) · Chromista (Kingdom) > Ciliophora (Phylum) > Spirotrichea (Class) > Oligotrichida (Order) > Ascampbelliellidae (Family)

Marshalliella
     Marshalliella Kieffer in André, 1914 accepted as Marshalliella Kieffer in André, 1914 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Scelionidae (Family)
     Marshalliella Poppius, 1914 accepted as Marshalliella Poppius, 1914 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Marshalliella Haas, 1931 accepted as Haasica Strand, 1932 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Unionoida (Order) > Mycetopodidae (Family)

Marsilea
     Marsilea Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Polypodiopsida (Class) > Salviniales (Order) > Marsileaceae (Family)
 Marsilea Adanson, 1763 accepted as · Plantae (Kingdom) > Marchantiophyta (Phylum) > Jungermanniopsida (Class) > Metzgeriales (Order) > Metzgeriales (awaiting allocation) (Family)

Marsilia
 Marsilia O. Kuntze, 1891 accepted as · Plantae (Kingdom) > Marchantiophyta (Phylum) > Marchantiopsida (Class) > Lunulariales (Order) > Lunulariaceae (Family)
 Marsilia Lioy, 1864 accepted as Marsillia Rondani, 1861 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)

Marsipograptus
     Marsipograptus Ulrich & Ruedemann, 1931 † accepted as Marsipograptus Ulrich & Ruedemann, 1931 † (unassessed) · Animalia (Kingdom) > Hemichordata (Phylum) > Graptolithina (Class) > Graptolithina (awaiting allocation) (Order) > Graptolithina (awaiting allocation) (Family)
     Marsipograptus Ruedemann, 1936 † accepted as Marsipograptus Ruedemann, 1936 † (unassessed) · Animalia (Kingdom) > Hemichordata (Phylum) > Graptolithina (Class) > Graptolithina (awaiting allocation) (Order) > Graptolithina (awaiting allocation) (Family)

Marssonia
 Marssonia H. Karsten, 1860 accepted as Napeanthus G. Gardner, 1843 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Gesneriaceae (Family)
 Marssonia J.C. Fischer in G.L. Rabenhorst, 1874 accepted as Marssonina Magnus, 1906 · Fungi (Kingdom) > Ascomycota (Phylum) > Leotiomycetes (Class) > Helotiales (Order) > Dermateaceae (Family)

Marssoniella
     Marssoniella Levinsen, 1925 † · Animalia (Kingdom) > Bryozoa (Phylum) > Stenolaemata (Class) > Cyclostomatida (Order) > Cyclostomatida (awaiting allocation) (Family)
     Marssoniella E. Lemmermann, 1900 accepted as Marssoniella E. Lemmermann, 1900 · Protozoa (Kingdom) > Microsporidia (Phylum) > Minisporea (Class) > Microsporida (Order) > Gurleyidae (Family)
 Marssoniella F. von Höhnel, 1916 accepted as Neomarssoniella U. Braun, 1991 · Fungi (Kingdom) > Ascomycota (Phylum) > Ascomycota incertae sedis (Class) > Ascomycota incertae sedis (Order) > Ascomycota incertae sedis (Family)

Marsupiocrinites
 Marsupiocrinites Blainville, 1830 † accepted as Marsupiocrinites Blainville, 1830 † (Unjustified (?) emendation) · Animalia (Kingdom) > Echinodermata (Phylum) > Crinoidea (Class) > Uintacrinida (Order) > Marsupitidae (Family)
     Marsupiocrinites Phillips in Murchison, 1839 † accepted as Marsupiocrinites Phillips in Murchison, 1839 † (unassessed) · Animalia (Kingdom) > Echinodermata (Phylum) > Crinoidea (Class) > Monobathrida (Order) > Marsupiocrinidae (Family)

Marsyas
     Marsyas Mulsant & Verreaux, 1875 accepted as Marsyas Mulsant & Verreaux, 1875 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Marsyas Putzeys, 1846 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
     Marsyas Oken, 1815 accepted as Marsyas Oken, 1815 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Martella
     Martella Peckham, 1892 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Salticidae (Family)
 Martella Adanson, 1763 accepted as Hericium Persoon, 1794 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Russulales (Order) > Hericiaceae (Family)
 Martella Endlicher, 1836 accepted as Hericium Persoon, 1794 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Russulales (Order) > Hericiaceae (Family)

Martellia
 Martellia Wirth, 1936 † accepted as Polytoechia Hall & Clarke, 1892 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Strophomenata (Class) > Billingsellida (Order) > Polytoechiidae (Family)
 Martellia Mattirolo, 1900 accepted as Russula Persoon, 1796 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Russulales (Order) > Russulaceae (Family)

Martensia
     Martensia K. Hering, 1841 · Plantae (Kingdom) > Rhodophyta (Phylum) > Florideophyceae (Class) > Ceramiales (Order) > Delesseriaceae (Family)
     Martensia Agassiz, 1860 accepted as Martensia Agassiz, 1860 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
     Martensia Barnard & Karaman, 1991 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Lysianassidae (Family)
 Martensia Möllendorff, 1887 accepted as Martensia Möllendorff, 1887 (Misspelling) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Streptaxidae (Family)
     Martensia Semper, 1870 accepted as Martensia Semper, 1870 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Martensia Giseke, 1792 accepted as Alpinia Roxburgh, 1810 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Zingiberales (Order) > Zingiberaceae (Family)

Martes
     Martes Pinel, 1792 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Mustelidae (Family)
     Martes Wagler, 1830 accepted as Martes Wagler, 1830 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Viverridae (Family)

Martha
     Martha Wagner in Sturany & Wagner, 1915 accepted as Martha Wagner in Sturany & Wagner, 1915 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Martha F.J. Müller, 1866 accepted as Posoqueria Aublet, 1775 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)

Marthamea
     Marthamea Klapálek, 1907 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Plecoptera (Order) > Perlidae (Family)
 Marthamea Claassen, 1940 accepted as Marthamea Klapálek, 1907 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Plecoptera (Order) > Perlidae (Family)

Marthanella
     Marthanella J.S. States & R. Fogel, 1999 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Agaricales (Order) > Strophariaceae (Family)
 Marthanella Roewer, 1910 accepted as Marthana Thorell, 1891 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Opiliones (Order) > Sclerosomatidae (Family)

Martia
     Martia Ragonot, 1887 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Pyralidae (Family)
 Martia Leandro de Sacramento, 1821 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)
     Martia Forel, 1907 accepted as Martia Forel, 1907 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Martia K.P.J. Sprengel, 1818 accepted as Martia K.P.J. Sprengel, 1818 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Clusiaceae (Family)
 Martia Valeton, 1886 accepted as Pleurisanthes Baillon, 1874 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Icacinales (Order) > Icacinaceae (Family)

Martina
     Martina Mineo, 2007 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Scelionidae (Family)
     Martina Ziegler, 1984 † · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Polychaeta (awaiting allocation) (Order) > Polychaeta incertae sedis (Family)

Martinella
     Martinella Bolívar, 1909 accepted as Martinella Bolívar, 1909 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Orthoptera (awaiting allocation) (Family)
     Martinella Medvedev, 2000 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
     Martinella Sicard, 1907 accepted as Martinella Sicard, 1907 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coccinellidae (Family)
     Martinella Jousseaume, 1887 accepted as Martinella Jousseaume, 1887 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Martinella Baillon, 1888 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Bignoniaceae (Family)
 Martinella A.A.H. Léveillé, 1904 accepted as Eutrema R. Brown, 1823 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Brassicaceae (Family)
     Martinella (M.C. Cooke & Massee ex M.C. Cooke) P.A. Saccardo, 1892 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Phyllachorales (Order) > Phyllachoraceae (Family)
     Martinella Artigas & Papavero, 1995 accepted as Martinella Artigas & Papavero, 1995 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Asilidae (Family)
     Martinella Cockerell, 1903 accepted as Martinella Cockerell, 1903 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Apidae (Family)

Martinezia
     Martinezia Bolívar, 1881 accepted as Martinezia Bolívar, 1881 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Orthoptera (awaiting allocation) (Family)
     Martinezia Hegner & Hewitt, 1940 · Protozoa (Kingdom) > Amoebozoa (Phylum) > Archamoebea (Class) > Entamoebida (Order) > Entamoebidae (Family)
 Martinezia Chalumeau, 1983 accepted as Martineziella Chalumeau, 1987 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
 Martinezia Ruiz & Pavón, 1794 accepted as Prestoea J.D. Hooker in Bentham & J.D. Hooker, 1883 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Arecales (Order) > Arecaceae (Family)

Martineziella
     Martineziella Hegner & Hewitt, 1941 accepted as Martineziella Hegner & Hewitt, 1941 (unassessed) · Protozoa (Kingdom) > Amoebozoa (Phylum) > Archamoebea (Class) > Entamoebida (Order) > Entamoebidae (Family)
     Martineziella Chalumeau, 1987 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Martinia
     Martinia Handmann, 1887 † accepted as Martinia Handmann, 1887 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Martinia M'Coy in Griffith, 1844 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Spiriferida (Order) > Martiniidae (Family)
     Martinia Schouteden, 1907 accepted as Martinia Schouteden, 1907 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Martinia Whetzel, 1942 accepted as Martininia K.P. Dumont & R.P. Korf, 1970 · Fungi (Kingdom) > Ascomycota (Phylum) > Leotiomycetes (Class) > Helotiales (Order) > Sclerotiniaceae (Family)
 Martinia E. Vaniot, 1903 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
     Martinia L. Crié, 1889 † accepted as Martinia L. Crié, 1889 † (unassessed) · Plantae (Kingdom) > Plantae (awaiting allocation) (Phylum) > Plantae (awaiting allocation) (Class) > Plantae (awaiting allocation) (Order) > Plantae (awaiting allocation) (Family)
     Martinia Hull, 1962 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Asilidae (Family)
 Martinia Amsel, 1956 accepted as Micromartinia Amsel, 1957 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Crambidae (Family)

Martiniana
     Martiniana Schimmel, 1997 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)
 Martiniana Pallary, 1920 accepted as Martiniana Pallary, 1920 (Misspelling) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Martiniella
     Martiniella Grabau & Tien in Grabau, 1931 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Spiriferida (Order) > Martiniidae (Family)
     Martiniella Schlickum & Moayedpour, 1973 † accepted as Martiniella Schlickum & Moayedpour, 1973 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Gastropoda (awaiting allocation) (Order) > Gastropoda (awaiting allocation) (Family)
 Martiniella Jesudasan & David, 1990 accepted as Aleuroclava Singh, 1931 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Aleyrodidae (Family)

Martinsia
     Martinsia Chemsak & Linsley, 1967 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Martinsia Godron, 1853 accepted as Martinsia Godron, 1853 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Brassicaceae (Family)

Martiusara
     Martiusara J.M.H. Shaw, 2005 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)
 Martiusara J.M.H. Shaw, 2004 accepted as Martiusara J.M.H. Shaw, 2005 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)

Martiusia
     Martiusia J.A. Schultes, 1822 accepted as Martiusia J.A. Schultes, 1822 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)
 Martiusia Bentham, 1840 accepted as Martiodendron Gleason, 1935 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)

Martynovia
     Martynovia Tillyard, 1932 † accepted as Martynovia Tillyard, 1932 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diaphanopterodea (Order) > Martynoviidae (Family)
 Martynovia Derzhavin, 1945 accepted as Niphargus Schiödte, 1849 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Niphargidae (Family)

Martynoviella
     Martynoviella Aspöck & Aspöck, 1968 accepted as Martynoviella Aspöck & Aspöck, 1968 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Megaloptera (Order) > Megaloptera (awaiting allocation) (Family)
     Martynoviella Tillyard, 1932 † accepted as Martynoviella Tillyard, 1932 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Neuroptera (Order) > Neuroptera (awaiting allocation) (Family)

Marumia
     Marumia Reinwardt, 1825 accepted as Marumia Reinwardt, 1825 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Actinidiaceae (Family)
 Marumia Blume, 1831 accepted as Macrolenes Naudin, 1850 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Melastomataceae (Family)

Maryonychia
     Maryonychia Pojeta, 1966 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pterioida (Order) > Pterioida (awaiting allocation) (Family)
     Maryonychia Pojeta, 1964 † accepted as Maryonychia Pojeta, 1964 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Bivalvia (awaiting allocation) (Order) > Bivalvia (awaiting allocation) (Family)

Marzaria
     Marzaria Rafinesque, 1840 accepted as Marzaria Rafinesque, 1840 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ranunculales (Order) > Papaveraceae (Family)
 Marzaria A. de Zigno, 1867 † accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Polypodiopsida (Class) > Polypodiidae (awaiting allocation) (Order) > Polypodiidae (awaiting allocation) (Family)

Masaakia
     Masaakia Thapa, 1989 accepted as Masaakia Thapa, 1989 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadellidae (Family)
     Masaakia Takeuchi, 1950 accepted as Masaakia Takeuchi, 1950 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Tenthredinidae (Family)

Masakia
     Masakia (Nakai) Nakai, 1949 accepted as Masakia (Nakai) Nakai, 1949 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Celastrales (Order) > Celastraceae (Family)
 Masakia Kloszcova, 1987 accepted as Masakiella Guiry & O.N.Selivanova, 2007 (synonym) · Plantae (Kingdom) > Rhodophyta (Phylum) > Rhodophyta incertae sedis (Class) > Cryptonemiales (Order) > Corallinaceae (Family)

Mascarena
     Mascarena Arrow, 1919 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
 Mascarena L.H. Bailey, 1942 accepted as Hyophorbe J. Gaertner, 1791 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Arecales (Order) > Arecaceae (Family)

Mascarensia
 Mascarensia Franz, 1973 accepted as Scydmaenus Latreille, 1802 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Mascarensia Franz, 1972 accepted as Scydmaenus Latreille, 1802 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Maschalanthus
     Maschalanthus K.P.J. Sprengel ex K.F. Schultz, 1806 accepted as Maschalanthus K.P.J. Sprengel ex K.F. Schultz, 1806 (unassessed) · Plantae (Kingdom) > Bryophyta (Phylum) > Bryopsida (Class) > Hypnobryales (Order) > Entodontaceae (Family)
 Maschalanthus Nuttall, 1835 accepted as Savia Willdenow, 1806 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Phyllanthaceae (Family)

Mashona
     Mashona Pate, 1944 accepted as Mashona Pate, 1944 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Mashona Hodgson, 1967 accepted as Eumashona Hodgson, 1973 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Coccidae (Family)

Maskellia
     Maskellia Fuller, 1897 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Diaspididae (Family)
     Maskellia Fuller, 1897 accepted as Maskellia Fuller, 1897 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Diaspididae (Family)

Maslovella
 Maslovella H. Tappan & A.R. Loeblich Jr., 1966 † accepted as Watznaueria P. Reinhardt, 1964 † · Chromista (Kingdom) > Haptophyta (Phylum) > Coccolithophyceae (Class) > Watznaueriales (Order) > Watznaueriaceae (Family)
 Maslovella R.B. Samoilova, 1986 † accepted as Sycidium G. Sandberger, 1849 † (junior homonym and synonym) · Plantae (Kingdom) > Charophyta (Phylum) > Charophyceae (Class) > Sycidiales (Order) > Sycidiaceae (Family)

Masoala
     Masoala H. Jumelle, 1933 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Arecales (Order) > Arecaceae (Family)
 Masoala Jeannel, 1954 accepted as Ranavala Raffray, 1898 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Masonia
     Masonia Tutt, 1900 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Psychidae (Family)
 Masonia G. Smith, 1952 accepted as Scopulariopsis Bainier, 1907 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Microascales (Order) > Microascaceae (Family)
 Masonia Hansford, 1944 accepted as Dictyonella von Höhnel, 1909 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Dothideomycetidae incertae sedis (Order) > Saccardiaceae (Family)

Masoniella
     Masoniella Vockeroth, 1995 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Canacidae (Family)
 Masoniella G. Smith, 1952 accepted as Scopulariopsis Bainier, 1907 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Microascales (Order) > Microascaceae (Family)

Maspakites
     Maspakites Lazarenko in Lazarenko & Nikiforov, 1968 † accepted as Maspakites Lazarenko in Lazarenko & Nikiforov, 1968 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)
     Maspakites Lazarenko & Datsenko, 1967 † accepted as Maspakites Lazarenko & Datsenko, 1967 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)

Massaga
     Massaga Walker, 1854 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Massaga Doherty, 1889 accepted as Massaga Doherty, 1889 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lycaenidae (Family)

Massalongia
     Massalongia Kieffer, 1897 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Cecidomyiidae (Family)
     Massalongia Körber, 1855 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Peltigerales (Order) > Massalongiaceae (Family)

Massaria
     Massaria G. De Notaris, 1844 · Fungi (Kingdom) > Ascomycota (Phylum) > Eurotiomycetes (Class) > Pyrenulales (Order) > Massariaceae (Family)
 Massaria Gistel, 1848 accepted as Liparis Scopoli, 1777 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Scorpaeniformes (Order) > Liparidae (Family)

Massartia
     Massartia De Wildeman, 1897 · Fungi (Kingdom) > Zygomycota (Phylum) > Zygomycota incertae sedis (Class) > Zoopagales (Order) > Zoopagales incertae sedis (Family)
     Massartia Schouteden, 1952 accepted as Massartia Schouteden, 1952 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Massartia Selman, 1965 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
 Massartia Conrad, 1926 accepted as Katodinium Fott, 1957 (synonym) · Chromista (Kingdom) > Miozoa (Phylum) > Dinophyceae (Class) > Gymnodiniales (Order) > Gymnodiniaceae (Family)

Massicyta
     Massicyta Walker, 1856 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Stratiomyidae (Family)
     Massicyta Walker, 1856 accepted as Massicyta Walker, 1856 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Arctiidae (Family)

Massula
     Massula Petrunkevitch, 1942 † · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Gnaphosidae (Family)
     Massula Dulac, 1867 accepted as Massula Dulac, 1867 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Typhaceae (Family)
 Massula K. Müller Frib. ex R.N. Schljakov, 1972 accepted as · Plantae (Kingdom) > Marchantiophyta (Phylum) > Jungermanniopsida (Class) > Jungermanniales (Order) > Lophoziaceae (Family)

Massularia
     Massularia (K. Schumann) Hoyle in J.B. Davy & Hoyle, 1937 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)
 Massularia R.N. Schljakov, 1985 accepted as · Plantae (Kingdom) > Marchantiophyta (Phylum) > Jungermanniopsida (Class) > Jungermanniales (Order) > Lophoziaceae (Family)

Mastaccembelus
 Mastaccembelus Walbaum, 1792 accepted as Belone Cuvier, 1816 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Beloniformes (Order) > Belonidae (Family)
 Mastaccembelus Klein, 1776 accepted as Belone Cuvier, 1816 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Beloniformes (Order) > Belonidae (Family)

Mastacembelus
     Mastacembelus Jarocki, 1822 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Synbranchiformes (Order) > Mastacembelidae (Family)
     Mastacembelus Scopoli, 1777 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Synbranchiformes (Order) > Mastacembelidae (Family)
 Mastacembelus Walbaum, 1792 accepted as Belone Cuvier, 1816 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Beloniformes (Order) > Belonidae (Family)
 Mastacembelus Gronow, 1763 accepted as Mastacembelus Jarocki, 1822 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Synbranchiformes (Order) > Mastacembelidae (Family)

Mastax
     Mastax Fischer de Waldheim, 1828 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Mastax Perty, 1832 accepted as Eumastax Burr, 1899 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Eumastacidae (Family)
 Mastax Kleine, 1918 accepted as Kleineella Strand, 1918 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)

Mastigimas
     Mastigimas Enderlein, 1927 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Lonchaeidae (Family)
     Mastigimas Enderlein, 1921 accepted as Mastigimas Enderlein, 1921 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Mastigocera
     Mastigocera Harris, 1839 accepted as Mastigocera Harris, 1839 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Syntomidae (Family)
     Mastigocera Berthold in Latreille, 1827 accepted as Mastigocera Berthold in Latreille, 1827 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Mastigocera Dejean, 1835 accepted as Mallonia Thomson, 1857 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Mastigocera Parry, 1849 accepted as Mallonia Thomson, 1857 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Mastigoceras
     Mastigoceras Handschin, 1924 accepted as Mastigoceras Handschin, 1924 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Collembola (Class) > (Order) > Collembola (awaiting allocation) (Family)
     Mastigoceras Böhm, 1925 † accepted as Mastigoceras Böhm, 1925 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Mastigocerus
 Mastigocerus Bergroth, 1894 accepted as Mastigocerus Bergroth, 1894 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Mastigocerus Solier in Gay, 1849 accepted as Mastigocerus Solier in Gay, 1849 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Mastigocerus Gemminger & Harold, 1869 accepted as Mastinocerus Solier in Gay, 1849 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Phengodidae (Family)

Mastigodes
     Mastigodes Blainville, 1828 accepted as Mastigodes Blainville, 1828 (unassessed) · Animalia (Kingdom) > Nematoda (Phylum) > Nematoda (awaiting allocation) (Class) > Nematoda (awaiting allocation) (Order) > Nematoda (awaiting allocation) (Family)
 Mastigodes Zeder, 1800 accepted as Trichuris Röderer, 1761 · Animalia (Kingdom) > Nematoda (Phylum) > Dorylaimea (Class) > Trichocephalida (Order) > Trichuridae (Family)

Mastigonema
     Mastigonema Dailey & Perrin, 1973 † · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Spirurida (Order) > Spiruridae (Family)
     Mastigonema H. Schwabe ex A.B. Frank, 1886 · Bacteria (Kingdom) > Cyanobacteria (Phylum) > Cyanophyceae (Class) > Nostocales (Order) > Rivulariaceae (Family)
 Mastigonema Spegazzini, 1926 accepted as Chaetospermum P.A. Saccardo, 1892 · Fungi (Kingdom) > Ascomycota (Phylum) > Ascomycota incertae sedis (Class) > Ascomycota incertae sedis (Order) > Ascomycota incertae sedis (Family)

Mastigonodesmus
     Mastigonodesmus Silvestri, 1897 accepted as Mastigonodesmus Silvestri, 1897 · Animalia (Kingdom) > Arthropoda (Phylum) > Diplopoda (Class) > Polydesmida (Order) > Polydesmidae (Family)
     Mastigonodesmus Silvestri, 1897 accepted as Mastigonodesmus Silvestri, 1897 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Diplopoda (Class) > Polydesmida (Order) > Polydesmidae (Family)

Mastigophiura
     Mastigophiura Lehmann, 1951 † · Animalia (Kingdom) > Echinodermata (Phylum) > Ophiuroidea (Class) > Oegophiurida (Order) > Oegophiurida (awaiting allocation) (Family)
 Mastigophiura Lehmann, 1957 † accepted as Mastigophiura Lehmann, 1951 † · Animalia (Kingdom) > Echinodermata (Phylum) > Ophiuroidea (Class) > Oegophiurida (Order) > Oegophiurida (awaiting allocation) (Family)

Mastigophora
     Mastigophora Felder, 1875 accepted as Mastigophora Felder, 1875 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Mastigophora Owen, 1856 † · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Teuthoidea (Order) > Teuthoidea (awaiting allocation) (Family)
     Mastigophora C.G.D. Nees, 1838 · Plantae (Kingdom) > Marchantiophyta (Phylum) > Jungermanniopsida (Class) > Jungermanniales (Order) > Mastigophoraceae (Family)
 Mastigophora C.G.D. Nees, 1833 accepted as Mastigophora C.G.D. Nees, 1833 (nomen rejiciendum) · Plantae (Kingdom) > Marchantiophyta (Phylum) > Jungermanniopsida (Class) > Jungermanniales (Order) > Lepidoziaceae (Family)
     Mastigophora Lendenfeld, 1887 accepted as Mastigophora Lendenfeld, 1887 · Animalia (Kingdom) > Porifera (Phylum) > Porifera (awaiting allocation) (Class) > Porifera (awaiting allocation) (Order) > Porifera (awaiting allocation) (Family)
 Mastigophora Haase, 1888 accepted as Mastigophorus Poey, 1832 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
 Mastigophora Hincks, 1880 accepted as Herentia Gray, 1848 · Animalia (Kingdom) > Bryozoa (Phylum) > Gymnolaemata (Class) > Lepraliomorpha (Order) > Escharinidae (Family)
 Mastigophora Diesing, 1865 accepted as Sarcomastigota · Protozoa (Kingdom) > (Phylum) > Mastigophora (Class) > (Order) > (Family)

Mastigophorus
     Mastigophorus Cassini in F. Cuvier, 1825 accepted as Mastigophorus Cassini in F. Cuvier, 1825 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
     Mastigophorus Poey, 1832 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
 Mastigophorus Kaup, 1873 accepted as Dactyloptena Jordan & Richardson, 1908 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Scorpaeniformes (Order) > Dactylopteridae (Family)

Mastigopsis
     Mastigopsis Sande Lacoste ex Lacouture, 1910 accepted as Mastigopsis Sande Lacoste ex Lacouture, 1910 (unassessed) · Plantae (Kingdom) > Marchantiophyta (Phylum) > Jungermanniopsida (Class) > Jungermanniales (Order) > Lepidoziaceae (Family)
     Mastigopsis Grimpe, 1922 · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Teuthoidea (Order) > Mastigoteuthidae (Family)

Mastigopus
 Mastigopus Stimpson, 1858 accepted as Mastigochirus Miers, 1878 (homonym of Mastigopus Leuckart, 1853) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Hippidae (Family)
     Mastigopus Leuckart, 1853 accepted as Mastigopus Leuckart, 1853 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Sergestoidea incertae sedis (Family)

Mastigothrix
     Mastigothrix F. Poche, 1913 · Protozoa (Kingdom) > (Phylum) > (Class) > Sarcomastigota (awaiting allocation) (Order) > Flagellata (awaiting allocation) (Family)
 Mastigothrix Reinsch, 1867 accepted as Mastigothrix Reinsch, 1867 (Pre-starting-point name) · Bacteria (Kingdom) > Cyanobacteria (Phylum) > Cyanophyceae (Class) > Cyanophyceae (awaiting allocation) (Order) > Cyanophyceae (awaiting allocation) (Family)

Mastigus
     Mastigus Latreille, 1802 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Mastigus Illiger, 1802 accepted as Scydmaenus Latreille, 1802 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Mastocephalus
     Mastocephalus O. Kuntze ex F.S. Earle, 1909 accepted as Mastocephalus O. Kuntze ex F.S. Earle, 1909 (unassessed) · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Agaricales (Order) > Agaricaceae (Family)
     Mastocephalus van Hoepen, 1934 † accepted as Mastocephalus van Hoepen, 1934 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Amphibia (awaiting allocation) (Order) > Amphibia (awaiting allocation) (Family)
 Mastocephalus Battarra ex Kuntze, 1891 accepted as Leucocoprinus Patouillard, 1888 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Agaricales (Order) > Agaricaceae (Family)

Mastododera
     Mastododera Blanchard, 1845 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Mastododera Thomson, 1857 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Mastophora
     Mastophora Decaisne, 1842 · Plantae (Kingdom) > Rhodophyta (Phylum) > Rhodophyta incertae sedis (Class) > Cryptonemiales (Order) > Corallinaceae (Family)
     Mastophora Holmberg, 1876 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Araneidae (Family)

Mastophorus
     Mastophorus Diesing, 1853 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Spirurida (Order) > Spirocercidae (Family)
     Mastophorus Schrammen, 1924 † · Animalia (Kingdom) > Porifera (Phylum) > Demospongea (Class) > Lithistida (Order) > Lithistida (awaiting allocation) (Family)

Mastopora
     Mastopora Sokolov, 1952 † · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Tabulata (Order) > Auloporidae (Family)
     Mastopora C.E.I. von Eichwald, 1840 † · Plantae (Kingdom) > Chlorophyta (Phylum) > Ulvophyceae (Class) > Cyclocrinales (Order) > Cyclocrinaceae (Family)

Mastus
     Mastus Beck, 1837 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Enidae (Family)
 Mastus Motschoulsky, 1864 accepted as Cymindis Latreille, 1806 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Matacus
     Matacus Giglio-Tos, 1897 accepted as Matacus Giglio-Tos, 1897 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)
     Matacus Rafinesque, 1815 accepted as Matacus Rafinesque, 1815 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)

Matapa
     Matapa Moore, 1881 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Hesperiidae (Family)
 Matapa Boessenecker & Fordyce, 2017 † accepted as Matapanui Boessenecker & Fordyce, 2017 † (junior homonym) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Eomysticetidae (Family)

Mataxa
     Mataxa Wade, 1916 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Cancellariidae (Family)
     Mataxa K.P.J. Sprengel, 1827 accepted as Mataxa K.P.J. Sprengel, 1827 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Matella
 Matella Gistl, 1848 accepted as Matella Gistl, 1848 (Unjustified (?) emendation) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Matella Moore, 1885 accepted as Matella Moore, 1885 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Maternella
     Maternella Zagora, 1967 † accepted as Maternella Zagora, 1967 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Ostracoda (awaiting allocation) (Order) > Ostracoda (awaiting allocation) (Family)
     Maternella Rabien, 1954 † · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Myodocopida (Order) > Bolbozoidae (Family)

Mateuius
     Mateuius Deuve, 1990 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Mateuius Roudier, 1957 accepted as Lichenophagus Wollaston, 1854 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Matherellina
     Matherellina Kobayashi, 1937 † · Animalia (Kingdom) > Mollusca (Phylum) > Helcionelloida (Class) > Onychochiliformes (Order) > Onychochilidae (Family)
     Matherellina Kobayashi, 1936 † accepted as Matherellina Kobayashi, 1936 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)

Mathewsia
     Mathewsia Iredale, 1911 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Gruiformes (Order) > Gruidae (Family)
     Mathewsia W.J. Hooker & Arnott, 1833 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Brassicaceae (Family)

Matonia
     Matonia R. Brown in Wallich, 1829 · Plantae (Kingdom) > Tracheophyta (Phylum) > Polypodiopsida (Class) > Gleicheniales (Order) > Matoniaceae (Family)
 Matonia J. Stephenson & J.M. Churchill, 1831 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Zingiberales (Order) > Zingiberaceae (Family)

Matrella
     Matrella Erdös, 1959 accepted as Matrella Erdös, 1959 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Matrella Persoon, 1805 accepted as Zoysia Willdenow, 1801 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Poaceae (Family)

Matronella
     Matronella Damotte, 1974 † · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Podocopida (Order) > Podocopida (awaiting allocation) (Family)
 Matronella Russell, Louis & Savage, 1975 † accepted as Neomatronella Russell, Louis & Savage, 1975 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Erinaceomorpha (Order) > Amphilemuridae (Family)

Matruchotia
     Matruchotia Boulanger, 1893 · Fungi (Kingdom) > Ascomycota (Phylum) > Ascomycota incertae sedis (Class) > Ascomycota incertae sedis (Order) > Ascomycota incertae sedis (Family)
 Matruchotia Skupienski, 1924 accepted as Amaurochaete Rostafinski, 1873 · Protozoa (Kingdom) > Amoebozoa (Phylum) > Myxogastrea (Class) > Fuscisporida (Order) > Stemonitidae (Family)

Matruchotiella
 Matruchotiella Grigoraki, 1924 accepted as Ateleothylax M. Ota & M. Langeron, 1923 · Fungi (Kingdom) > Ascomycota (Phylum) > Ascomycota incertae sedis (Class) > Ascomycota incertae sedis (Order) > Ascomycota incertae sedis (Family)
 Matruchotiella Skupienski ex G. Lister in A. Lister, 1925 accepted as Amaurochaete Rostafinski, 1873 · Protozoa (Kingdom) > Amoebozoa (Phylum) > Myxogastrea (Class) > Fuscisporida (Order) > Stemonitidae (Family)

Matsumurella
     Matsumurella Ishihara, 1953 accepted as Matsumurella Ishihara, 1953 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadellidae (Family)
 Matsumurella Makino, 1915 accepted as Lamium Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Lamiaceae (Family)

Matsumuria
     Matsumuria Okamoto, 1912 accepted as Matsumuria Okamoto, 1912 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Plecoptera (Order) > Plecoptera (awaiting allocation) (Family)
 Matsumuria Hemsley, 1909 accepted as Titanotrichum Solereder, 1909 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Gesneriaceae (Family)

Matteoea
 Matteoea Hoser, 2009 accepted as Crotalus Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Viperidae (Family)
 Matteoea Hoser, 2012 accepted as Crotalus Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Viperidae (Family)

Matthewlenus
     Matthewlenus Hupé in Piveteau Traité de Paléont., 1953 † accepted as Matthewlenus Hupé in Piveteau Traité de Paléont., 1953 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)
     Matthewlenus Hupé, 1953 † accepted as Matthewlenus Hupé, 1953 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)

Matthiola
     Matthiola W.T. Aiton, 1812 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Brassicaceae (Family)
 Matthiola Linnaeus, 1753 accepted as Guettarda Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)

Maturna
     Maturna Koch, 1850 accepted as Maturna Koch, 1850 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Arachnida (awaiting allocation) (Order) > Arachnida (awaiting allocation) (Family)
     Maturna Stål, 1867 accepted as Maturna Stål, 1867 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Membracidae (Family)
 Maturna Rafinesque, 1837 accepted as Gomesa R. Brown in J. Sims, 1815 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)

Matuta
     Matuta Weber, 1795 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Matutidae (Family)
     Matuta Grote, 1874 accepted as Matuta Grote, 1874 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Matuta Emel'yanov, 1966 accepted as Matuta Emel'yanov, 1966 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Matutinus
     Matutinus Distant, 1917 accepted as Matutinus Distant, 1917 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Delphacidae (Family)
 Matutinus Macleay in Smith, 1838 accepted as Matuta Weber, 1795 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Matutidae (Family)

Maublancia
     Maublancia G. Arnaud, 1918 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Microthyriales (Order) > Microthyriaceae (Family)
     Maublancia Bellamy, 1998 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)
     Maublancia Théry, 1947 † · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)
     Maublancia Lepesme & Breuning, 1956 † accepted as Maublancia Lepesme & Breuning, 1956 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Maudia
     Maudia Gray, 1858 accepted as Maudia Gray, 1858 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
     Maudia Carter in Carter, Cameron & Smith, 1988 † accepted as Maudia Carter in Carter, Cameron & Smith, 1988 † (unassessed) · Protozoa (Kingdom) > (Phylum) > (Class) > Sarcomastigota (awaiting allocation) (Order) > Sarcomastigota (awaiting allocation) (Family)

Maugeria
     Maugeria S.O. Gray, 1867 accepted as Maugeria S.O. Gray, 1867 (unassessed) · Plantae (Kingdom) > Rhodophyta (Phylum) > Florideophyceae (Class) > Ceramiales (Order) > Delesseriaceae (Family)
     Maugeria Gray, 1857 · Animalia (Kingdom) > Mollusca (Phylum) > Polyplacophora (Class) > Ischnochitonida (Order) > Chitonidae (Family)

Maughania
 Maughania Jaume St.-Hilaire, 1813 accepted as Flemingia Roxburgh ex W.T. Aiton, 1812 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)
 Maughania N.E. Brown, 1931 accepted as Diplosoma Schwantes, 1926 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Aizoaceae (Family)

Mauia
     Mauia Blackburn in Blackburn & Sharp, 1885 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthribidae (Family)
 Mauia Marwick, 1926 † accepted as Mauira Marwick, 1943 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Volutidae (Family)

Mauna
     Mauna Walker, 1865 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
 Mauna Blackburn, 1884 accepted as Neomauna Turgut & Özdikmen, 2006 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Maupasia
 Maupasia L. Morellet & J. Morellet, 1919 † accepted as · Plantae (Kingdom) > Chlorophyta (Phylum) > Ulvophyceae (Class) > Dasycladales (Order) > Dasycladaceae (Family)
     Maupasia Viguier, 1886 · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Phyllodocida (Order) > Lopadorrhynchidae (Family)
     Maupasia W. Schewiakoff, 1892 accepted as Maupasia W. Schewiakoff, 1892 (unassessed) · Protozoa (Kingdom) > (Phylum) > (Class) > Sarcomastigota (awaiting allocation) (Order) > Flagellata (awaiting allocation) (Family)

Mauria
     Mauria Kunth, 1824 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Sapindales (Order) > Anacardiaceae (Family)
 Mauria † accepted as Mauira Marwick, 1943 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Volutidae (Family)

Mauricia
     Mauricia Orian, 1954 accepted as Mauricia Orian, 1954 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadidae (Family)
     Mauricia Harris, 1919 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Mytiloida (Order) > Mytiloida (awaiting allocation) (Family)

Mauriella
 Mauriella Oliver, 1926 accepted as Maurea Oliver, 1926 (synonym) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Vetigastropoda (Order) > Calliostomatidae (Family)
 Mauriella de la Cruz, 1973 accepted as Capromylichus Fain, 1970 † · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Astigmata (Order) > Atopomelidae (Family)

Mauritia
     Mauritia Troschel, 1863 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Cypraeidae (Family)
     Mauritia Adams, 1869 accepted as Mauritia Adams, 1869 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Mauritia Linnaeus f., 1782 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Arecales (Order) > Arecaceae (Family)

Mauritiella
     Mauritiella Burret, 1935 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Arecales (Order) > Arecaceae (Family)
     Mauritiella Verves, 1989 accepted as Mauritiella Verves, 1989 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Sarcophagidae (Family)

Maurobaris
     Maurobaris Alonso-Zarazaga, 2005 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Maurobaris Zaslavskij, 1956 accepted as Melaleucus Chevrolat, 1882 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Maurocenia
     Maurocenia P. Miller, 1754 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Celastrales (Order) > Celastraceae (Family)
 Maurocenia Leman in F. Cuvier, 1823 accepted as · Plantae (Kingdom) > Marchantiophyta (Phylum) > Jungermanniopsida (Class) > Fossombroniales (Order) > Fossombroniaceae (Family)

Maurya
     Maurya Patouillard, 1898 · Fungi (Kingdom) > Ascomycota (Phylum) > Ascomycota incertae sedis (Class) > Ascomycota incertae sedis (Order) > Ascomycota incertae sedis (Family)
     Maurya Distant, 1916 accepted as Maurya Distant, 1916 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Membracidae (Family)

Mavia
     Mavia Seyrig, 1952 accepted as Mavia Seyrig, 1952 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Ichneumonidae (Family)
     Mavia G. Bertoloni, 1850 accepted as Mavia G. Bertoloni, 1850 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)

Mawsonella
     Mawsonella F. Chapman, 1927 † accepted as Mawsonella F. Chapman, 1927 † (unassessed) · Plantae (Kingdom) > Chlorophyta (Phylum) > Chlorophyta (awaiting allocation) (Class) > Chlorophyta (awaiting allocation) (Order) > Chlorophyta (awaiting allocation) (Family)
     Mawsonella Brady, 1918 · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Harpacticoida (Order) > Thalestridae (Family)

Mawsonia
     Mawsonia C.W. Dodge, 1948 · Fungi (Kingdom) > Ascomycota (Phylum) > Lichinomycetes (Class) > Lichinales (Order) > Lichinaceae (Family)
 Mawsonia Livingstone, 1928 accepted as Swanomia Hayward & Thorpe, 1989 (Junior homonym) · Animalia (Kingdom) > Bryozoa (Phylum) > Gymnolaemata (Class) > Cheilostomatida (Order) > Cellariidae (Family)
     Mawsonia Woodward, 1907 † accepted as Mawsonia Woodward, 1907 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Sarcopterygii (Class) > Coelacanthiformes (Order) > Mawsoniidae (Family)

Maxia
     Maxia Heyden in Saalmueller (Heyden), 1891 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Maxia Kirby, 1892 accepted as Maxia Kirby, 1892 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Arctiidae (Family)
     Maxia Graff, 1903 accepted as Maxia Graff, 1903 (unassessed) · Animalia (Kingdom) > Platyhelminthes (Phylum) > Turbellaria (Class) > Neorhabdocoela (Order) > Provorticidae (Family)
 Maxia O. Nilsson, 1967 accepted as Montia Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Montiaceae (Family)

Maxillaria
     Maxillaria Ruiz & Pavon, 1794 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)
 Maxillaria Gistl, 1848 accepted as Orthostoma Audinet-Serville, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Maxillaria Staudinger, 1879 accepted as Paramaxillaria Inoue, 1955 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Pyralidae (Family)

Maxillirhynchia
     Maxillirhynchia Buckman, 1917 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Rhynchonellida (Order) > Rhynchonellidae (Family)
     Maxillirhynchia Buckman, 1914 † accepted as Maxillirhynchia Buckman, 1917 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Rhynchonellida (Order) > Rhynchonellidae (Family)

Maximowiczia
     Maximowiczia Ruprecht, 1856 accepted as Maximowiczia Ruprecht, 1856 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Austrobaileyales (Order) > Schisandraceae (Family)
 Maximowiczia Cogniaux in Alph. de Candolle & A.C. de Candolle, 1881 accepted as Ibervillea E.L. Greene, 1895 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Cucurbitales (Order) > Cucurbitaceae (Family)

Maxwellia
     Maxwellia Baily, 1950 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Muricidae (Family)
     Maxwellia Baillon, 1871 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malvales (Order) > Malvaceae (Family)

Maya
     Maya Blattný, 1925 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Maya Rakusz, 1944 † accepted as Callispirina Cooper & Muir-Wood, 1951 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Spiriferida (Order) > Spiriferinidae (Family)

Mayazomus
     Mayazomus Reddell & Cokendolpher, 1995 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Schizomida (Order) > Hubbardiidae (Family)
     Mayazomus Reddell & Cokendolpher, 1995 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Schizomida (Order) > Hubbardiidae (Family)

Mayerella
     Mayerella Huntsman, 1915 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Caprellidae (Family)
     Mayerella Yanko, 1987 · Chromista (Kingdom) > Retaria (Phylum) > Globothalamea (Class) > Rotaliida (Order) > Elphidiidae (Family)
     Mayerella Janko in Janko & Troitskaja, 1987 † accepted as Mayerella Janko in Janko & Troitskaja, 1987 † (unassessed) · Protozoa (Kingdom) > (Phylum) > (Class) > Sarcomastigota (awaiting allocation) (Order) > Sarcomastigota (awaiting allocation) (Family)

Mayeria
     Mayeria Bellardi, 1873 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Neogastropoda (awaiting allocation) (Family)
 Mayeria Verrill, 1900 accepted as Eunice Cuvier, 1817 · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Eunicida (Order) > Eunicidae (Family)

Mayetia
     Mayetia Mulsant & Rey in Mulsant, 1875 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Mayetia Kieffer, 1896 accepted as Mayetiola Kieffer, 1896 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Cecidomyiidae (Family)

Maynea
     Maynea Schouteden, 1919 accepted as Maynea Schouteden, 1919 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Maynea Cunningham, 1871 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Zoarcidae (Family)

Mayoa
     Mayoa E.M. Friis, K.R. Pedersen & P.R. Crane, 2004 † accepted as Mayoa E.M. Friis, K.R. Pedersen & P.R. Crane, 2004 † (unassessed) · Plantae (Kingdom) > Sporae dispersae (Phylum) > (Class) > (Order) > (Family)
 Mayoa Day, 1870 accepted as Garra Hamilton, 1822 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Cypriniformes (Order) > Cyprinidae (Family)

Mayriella
     Mayriella Forel, 1902 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Formicidae (Family)
     Mayriella Mercet, 1921 accepted as Mayriella Mercet, 1921 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Mazaea
     Mazaea Krug & Urban, 1897 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)
     Mazaea Stål, 1876 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Mazaea Bornet & Grunow, 1881 accepted as Nostochopsis Wood ex Bornet & Flahault, 1886 · Bacteria (Kingdom) > Cyanobacteria (Phylum) > Cyanophyceae (Class) > Nostocales (Order) > Hapalosiphonaceae (Family)

Mazama
     Mazama Rafinesque, 1817 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Cervidae (Family)
     Mazama Ogilby, 1837 accepted as Mazama Ogilby, 1837 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Antilocapridae (Family)
 Mazama Smith, 1827 accepted as Odocoileus Rafinesque, 1832 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Cervidae (Family)

Mazzantia
     Mazzantia C. Montagne, 1855 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Diaporthales (Order) > Diaporthaceae (Family)
     Mazzantia Travassos & Kohn, 1964 accepted as Mazzantia Travassos & Kohn, 1964 (unassessed) · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Trematoda (awaiting allocation) (Order) > Trematoda (awaiting allocation) (Family)

Mazzettia
     Mazzettia Lambert & Thiéry, 1915 † · Animalia (Kingdom) > Echinodermata (Phylum) > Echinoidea (Class) > Spatangoida (Order) > Spatangoida (awaiting allocation) (Family)
     Mazzettia Iljin, 1955 accepted as Mazzettia Iljin, 1955 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Mclearnia
     Mclearnia Crickmay, 1930 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pterioida (Order) > Pterioida (awaiting allocation) (Family)
 McLearnia Crickmay, 1930 † accepted as Mclearnia Crickmay, 1930 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pterioida (Order) > Pterioida (awaiting allocation) (Family)
 Mclearnia Caster, 1939 † accepted as Shaleria Caster, 1939 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Strophomenata (Class) > Strophomenatida (Order) > Shaleriidae (Family)
 McLearnia Caster, 1939 † accepted as Mclearnites Caster, 1945 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Strophomenata (Class) > Strophomenatida (Order) > Shaleriidae (Family)

Mea
 Mea McIntosh, 1915 accepted as Mea McIntosh, 1915 (Misspelling) · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Magelonida (Order) > Magelonidae (Family)
     Mea Busck, 1906 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Tineidae (Family)

Meadia
     Meadia Böhlke, 1951 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Anguilliformes (Order) > Synaphobranchidae (Family)
     Meadia P. Miller, 1754 accepted as Meadia P. Miller, 1754 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Primulaceae (Family)

Meandrella
     Meandrella Perner in Barrande, 1903 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neritimorpha incertae sedis (Order) > Tubinidae (Family)
 Meandrella Oppenheim, 1930 accepted as Diploria Milne Edwards & Haime, 1848 · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Scleractinia (Order) > Faviidae (Family)

Mearnsia
     Mearnsia Ridgway, 1911 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Apodiformes (Order) > Apodidae (Family)
     Mearnsia Merrill, 1907 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Myrtaceae (Family)

Mecaspis
     Mecaspis Schönherr, 1823 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Mecaspis Lacordaire, 1869 accepted as Mecosaspis Thomson, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Mecistocerus
 Mecistocerus Gemminger & Harold, 1871 accepted as Mechistocerus Fauvel, 1863 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Mecistocerus Pascoe, 1870 accepted as Mechistocerus Fauvel, 1863 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Mecistura
     Mecistura Leach, 1816 accepted as Mecistura Leach, 1816 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Mecistura Forster, 1817 accepted as Mecistura Forster, 1817 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Meckelia
     Meckelia Robineau-Desvoidy, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Ulidiidae (Family)
 Meckelia Leuckart, 1828 accepted as Cerebratulus Renier, 1804 · Animalia (Kingdom) > Nemertea (Phylum) > Anopla (Class) > Heteronemertea (Order) > Lineidae (Family)
 Meckelia (C.F.P. Martius ex A.H.L. Jussieu) Grisebach in C.F.P. Martius, 1858 accepted as Spachea A.H.L. Jussieu in Delessert, 1838 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Malpighiaceae (Family)

Mecocerus
 Mecocerus Billberg, 1820 accepted as Mecocerus Billberg, 1820 (Suppressed name (ICZN)) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Mecocerus Schönherr, 1833 accepted as Acanthothorax Gaede, 1832 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthribidae (Family)
 Mecocerus Solier, 1835 accepted as Prostenus Berthold in Latreille, 1827 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Mecolepis
     Mecolepis Newberry, 1857 accepted as Mecolepis Newberry, 1857 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
     Mecolepis Duméril, 1851 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Agamidae (Family)

Mecopus
     Mecopus J.J. Bennett in J.J. Bennett & R. Brown, 1840 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)
     Mecopus Schönherr, 1825 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Mecostethus
     Mecostethus Fieber in Kelch, 1852 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Mecostethus Stål, 1857 accepted as Cryptocephalus Geoffroy, 1762 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Mecynocera
     Mecynocera Thompson I.C., 1888 · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Calanoida (Order) > Paracalanidae (Family)
 Mecynocera Pierce, 1908 accepted as Elenchus Curtis, 1831 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Strepsiptera (Order) > Elenchidae (Family)

Mecynopus
     Mecynopus Engel, 1925 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Asilidae (Family)
     Mecynopus Erichson, 1842 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Mecynostoma
     Mecynostoma Brongniart, 1893 † accepted as Mecynostoma Brongniart, 1893 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Mecynostoma Graff, 1882 accepted as Mecynostomum Beneden, 1870 · Animalia (Kingdom) > Xenacoelomorpha (Phylum) > Acoelomorpha incertae sedis (Class) > Acoela (Order) > Mecynostomidae (Family)

Medateus
 Medateus Gray, 1825 accepted as Medateus Gray, 1825 (Misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Chiroptera (Order) > Vespertilionidae (Family)
 Medateus Leach, 1821 accepted as Artibeus Leach, 1821 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Chiroptera (Order) > Phyllostomidae (Family)

Medea
     Medea Böttger, 1883 accepted as Medea Böttger, 1883 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Medea Eschscholtz, 1825 accepted as Beroe Gronov, 1760 · Animalia (Kingdom) > Ctenophora (Phylum) > Nuda (Class) > Beroida (Order) > Beroidae (Family)
 Medea Klotzsch, 1841 accepted as Croton Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Euphorbiaceae (Family)

Medera
     Medera Kistner & Jacobson, 1979 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Medera Norman, 1900 accepted as Medora Adams, 1855 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Clausiliidae (Family)

Medica
 Medica Cothenius, 1790 accepted as Tourrettia Fougeroux, 1787 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Bignoniaceae (Family)
 Medica P. Miller, 1754 accepted as Medicago Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)

Medina
     Medina Robineau-Desvoidy, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
     Medina Bordoni, 1975 accepted as Medina Bordoni, 1975 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Medinella
     Medinella Malloch, 1938 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
 Medinella accepted as Medinilla Gaudichaud-Beaupré ex A.P. de Candolle, 1828 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Melastomataceae (Family)

Medinophyllum
     Medinophyllum Sytova, 1966 † · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Stauriida (Order) > Entelophyllidae (Family)
     Medinophyllum Hancock, 1910 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tetrigidae (Family)

Mediocris
     Mediocris Rozovskaya, 1961 † · Chromista (Kingdom) > Retaria (Phylum) > Tubothalamea (Class) > Fusulinida (Order) > Ozawainellidae (Family)
     Mediocris Kazár, 2005 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Cetacea (Order) > Kentriodontidae (Family)

Medium
     Medium F.E.L. von Fischer ex A.L.P. de Candolle, 1830 accepted as Medium F.E.L. von Fischer ex A.L.P. de Candolle, 1830 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Campanulaceae (Family)
 Medium Opiz, 1839 accepted as Campanula Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Campanulaceae (Family)

Medon
     Medon Stephens, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
     Medon Stephens, 1833 accepted as Medon Stephens, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Medon Duchassaing & Michelotti, 1864 accepted as Leucandra Haeckel, 1872 (preoccupied) · Animalia (Kingdom) > Porifera (Phylum) > Calcarea (Class) > Sycettida (Order) > Grantiidae (Family)

Medonia
     Medonia Candèze, 1860 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)
 Medonia Baly, 1862 accepted as Monomacra Chevrolat, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
 Medonia Paetel, 1875 accepted as Temanella Rovereto, 1899 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Littorinidae (Family)

Medophron
     Medophron Aubert, 1968 † accepted as Medophron Aubert, 1968 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Medophron Förster, 1868 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Ichneumonidae (Family)

Medora
     Medora Agassiz, 1862 accepted as Medora Agassiz, 1862 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
     Medora Adams, 1855 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Clausiliidae (Family)
     Medora Kunth, 1850 accepted as Medora Kunth, 1850 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Liliales (Order) > Liliaceae (Family)

Medoria
     Medoria Robineau-Desvoidy, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
 Medoria Gray, 1842 accepted as Temanella Rovereto, 1899 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Littorinidae (Family)
 Medoria Leach in Gray, 1847 accepted as Lacuna Turton, 1827 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Littorinidae (Family)

Medusa
     Medusa Loureiro, 1790 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Violaceae (Family)
     Medusa Linnaeus, 1758 accepted as Medusa Linnaeus, 1758 (not in use) · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Actiniaria (Order) > Hormathiidae (Family)

Medusina
     Medusina Rueger-Haas in Rueger & Rueger-Haas, 1925 † accepted as Medusina Rueger-Haas in Rueger & Rueger-Haas, 1925 † (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
 Medusina Walcott, 1898 † accepted as Medusina Walcott, 1898 † (Misspelling) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
 Medusina F.F. Chevallier, 1826 accepted as Hericium Persoon, 1794 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Russulales (Order) > Hericiaceae (Family)

Medusites
     Medusites Germar in Keferstein, 1827 † accepted as Medusites Germar in Keferstein, 1827 † (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
     Medusites Haeckel, 1865 accepted as Medusites Haeckel, 1865 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)

Medusula
     Medusula Tode, 1790 · Fungi (Kingdom) > Ascomycota (Phylum) > Ascomycota incertae sedis (Class) > Ascomycota incertae sedis (Order) > Ascomycota incertae sedis (Family)
 Medusula Eschweiler, 1824 accepted as Sarcographa Fée, 1824 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Ostropales (Order) > Graphidaceae (Family)

Meeboldia
     Meeboldia H. Wolff, 1924 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Apiales (Order) > Apiaceae (Family)
 Meeboldia F.A. Pax & K. Hoffmann, 1936 accepted as Boscia Lamarck, 1793 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Capparaceae (Family)

Meekella
     Meekella White & St. John, 1867 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Strophomenata (Class) > Strophomenatida (Order) > Meekellidae (Family)
     Meekella Orchard, 2005 † · Animalia (Kingdom) > Chordata (Phylum) > Conodonta (Class) > Conodontophorida (Order) > Conodonta (awaiting allocation) (Family)

Meekia
     Meekia Gabb, 1864 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Tancrediidae (Family)
 Meekia Warren, 1912 accepted as Eumeekia Fletcher, 1979 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Meesia
     Meesia J. Hedwig, 1801 · Plantae (Kingdom) > Bryophyta (Phylum) > Bryopsida (Class) > Bryales (Order) > Meesiaceae (Family)
 Meesia J. Gaertner, 1788 accepted as Meesia J. Gaertner, 1788 (nomen rejiciendum) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Ochnaceae (Family)
 Meesia Lepeletier & Serville, 1828 accepted as Meesia Lepeletier & Serville, 1828 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Tenthredinidae (Family)

Megabalanus
     Megabalanus Hoek, 1913 · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Sessilia (Order) > Balanidae (Family)
 Megabalanus Zullo, 1967 accepted as Megabalanus Hoek, 1913 (later usage (?)) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Sessilia (Order) > Balanidae (Family)

Megablattina
     Megablattina Sellards, 1903 accepted as Megablattina Sellards, 1903 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Blattodea (Order) > Blattodea (awaiting allocation) (Family)
     Megablattina Brongniart, 1885 accepted as Megablattina Brongniart, 1885 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Blattodea (Order) > Blattodea (awaiting allocation) (Family)

Megabrenthorrhinus
     Megabrenthorrhinus Gratshev & Zherikhin, 1996 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Nemonychidae (Family)
     Megabrenthorrhinus Gratshev & Zherikhin, 1996 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Nemonychidae (Family)

Megacanthopus
     Megacanthopus Ducke, 1904 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Vespidae (Family)
 Megacanthopus Chopard, 1929 accepted as Macracanthopus Uvarov, 1940 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Mantodea (Order) > Mantidae (Family)

Megacentrus
     Megacentrus Széplegeti, 1904 accepted as Megacentrus Széplegeti, 1904 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Braconidae (Family)
     Megacentrus Heer in Heer & Escher, 1852 † · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)

Megacephala
 Megacephala Heine & Reichenow, 1890 accepted as Megacephala Heine & Reichenow, 1890 (Misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Megacephala Latreille, 1802-03 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Megacephalon
     Megacephalon Gray, 1844 accepted as Megacephalon Gray, 1844 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Megacephalon Saalmüller, 1880 accepted as Megacephalon Saalmüller, 1880 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Megacephalon Gray, 1846 accepted as Megacephalon Gray, 1846 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Megacephalon Hilzheimer, 1912 accepted as Equus Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Perissodactyla (Order) > Equidae (Family)

Megacephalus
     Megacephalus Bertoni, 1901 accepted as Megacephalus Bertoni, 1901 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Megacephalus Fitzinger, 1843 accepted as Megacephalus Fitzinger, 1843 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)

Megaceros
     Megaceros D.H. Campbell, 1907 · Plantae (Kingdom) > Anthocerotophyta (Phylum) > Anthocerotopsida (Class) > Anthocerotales (Order) > Anthocerotaceae (Family)
 Megaceros Owen, 1844 † accepted as Megaloceros Brookes, 1827 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Cervidae (Family)

Megacerus
     Megacerus Bridwell, 1929 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
     Megacerus Fåhraeus, 1839 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
 Megacerus Montrouzier, 1855 accepted as Ectocemus Pascoe, 1862 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)
 Megacerus Burmeister, 1847 accepted as Megaceras Hope, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Megacetes
 Megacetes Looss, 1899 accepted as Eumegacetes Looss, 1900 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Plagiorchiida (Order) > Eumegacetidae (Family)
 Megacetes Thomson, 1859 accepted as Coeliodes Schönherr, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Megachirus
 Megachirus Bronn, 1836 † accepted as Megachirus Bronn, 1836 † (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Mecochiridae (Family)
 Megachirus Faust, 1895 accepted as Pycnochirus Berg, 1898 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Megaciella
     Megaciella Hallmann, 1920 · Animalia (Kingdom) > Porifera (Phylum) > Demospongea (Class) > Poecilosclerida (Order) > Acarnidae (Family)
 Megaciella Vercammen-Grandjean, 1960 accepted as Blankaartia Oudemans, 1911 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Trombiculidae (Family)

Megacnemius
     Megacnemius Dejean, 1833 accepted as Megacnemius Dejean, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)
     Megacnemius Dejean, 1836 accepted as Megacnemius Dejean, 1836 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Megacnemius Laporte de Castelnau, 1840 accepted as Tomicephalus Latreille, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)

Megacoeloides
     Megacoeloides Poppius, 1914 accepted as Megacoeloides Poppius, 1914 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Megacoeloides Quicke, 1989 accepted as Megacoeloides Quicke, 1989 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Braconidae (Family)

Megacolus
     Megacolus Priesner, 1951 accepted as Megacolus Priesner, 1951 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Scelionidae (Family)
 Megacolus Cameron, 1903 accepted as Megalocolus Kirby, 1883 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Chalcididae (Family)

Megacronus
     Megacronus Stephens, 1832 accepted as Megacronus Stephens, 1832 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
     Megacronus Stephens, 1829 accepted as Bolitobius Samouelle, 1819 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Megacrotona
 Megacrotona Scheerpeltz accepted as Lypoglossa Fenyes, 1918 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Megacrotona Lohse, 1971 accepted as Lypoglossa Fenyes, 1918 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Megacyclops
     Megacyclops Broom, 1931 † accepted as Megacyclops Broom, 1931 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
     Megacyclops Kiefer, 1927 · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Cyclopoida (Order) > Cyclopidae (Family)

Megacystites
     Megacystites Hall, 1867 † accepted as Megacystites Hall, 1867 † (unassessed) · Animalia (Kingdom) > Echinodermata (Phylum) > Diploporita (Class) > Diploporita incertae sedis (Order) > Aristocystitidae (Family)
 Megacystites Frest & Strimple, 2011 † accepted as Holocystites Hall, 1865 † · Animalia (Kingdom) > Echinodermata (Phylum) > Diploporita (Class) > Diploporita incertae sedis (Order) > Aristocystitidae (Family)

Megadactylus
     Megadactylus Broili, 1929 † accepted as Megadactylus Broili, 1929 † (unassessed) · Animalia (Kingdom) > Animalia (awaiting allocation) (Phylum) > Animalia (awaiting allocation) (Class) > Animalia (awaiting allocation) (Order) > Animalia (awaiting allocation) (Family)
     Megadactylus Fitzinger, 1843 accepted as Megadactylus Fitzinger, 1843 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
 Megadactylus Hitchcock, 1865 † accepted as Anchisaurus Marsh, 1885 † · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Saurischia (Order) > Anchisauridae (Family)

Megadendron
     Megadendron Miers, 1875 accepted as Megadendron Miers, 1875 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Lecythidaceae (Family)
 Megadendron H.G.L. Reichenbach, 1836 † accepted as Megadendron H.G.L. Reichenbach, 1836 † (Not validly published) · Plantae (Kingdom) > Tracheophyta (Phylum) > Gymnospermae (awaiting allocation) (Class) > Gymnospermae (awaiting allocation) (Order) > Gymnospermae (awaiting allocation) (Family)

Megadenus
     Megadenus Rosén, 1910 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Ptenoglossa (Order) > Eulimidae (Family)
     Megadenus Rafinesque, 1825 accepted as Megadenus Rafinesque, 1825 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Cyperaceae (Family)

Megaderus
     Megaderus Audinet-Serville, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Megaderus Dejean, 1821 accepted as Megaderus Audinet-Serville, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Megaderus Rafinesque, 1815 accepted as Echidna Forster, 1788 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Anguilliformes (Order) > Muraenidae (Family)

Megadictyon
     Megadictyon Luo & Hu in Luo, Hu, Chen, Zhang & Tao, 1999 † accepted as Megadictyon Luo & Hu in Luo, Hu, Chen, Zhang & Tao, 1999 † (unassessed) · Animalia (Kingdom) > Lobopoda (Phylum) > Lobopoda (awaiting allocation) (Class) > Lobopoda (awaiting allocation) (Order) > Lobopoda (awaiting allocation) (Family)
 Megadictyon Kozur, Krainer & Mostler, 1996 † accepted as Paleodictyon Meneghini, 1850 (1851?) · Animalia (Kingdom) > Trace fossils (awaiting allocation) (Phylum) > Trace fossils (awaiting allocation) (Class) > Trace fossils (awaiting allocation) (Order) > Trace fossils (awaiting allocation) (Family)

Megadorus
     Megadorus Goodey, 1960 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Panagrolaimida (Order) > Aphelenchidae (Family)
     Megadorus Linnavuori, 1959 accepted as Megadorus Linnavuori, 1959 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Megadrepanoides
     Megadrepanoides Self & Kuntz, 1956 accepted as Megadrepanoides Self & Kuntz, 1957 · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Porocephalida (Order) > Sambonidae (Family)
 Megadrepanoides Self & Kuntz, 1957 accepted as Sambonia Noc & Giglioli, 1922 (junior synonym) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Porocephalida (Order) > Sebekidae (Family)

Megadromus
     Megadromus Motschoulsky, 1865 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Megadromus Wainstein, 1962 † accepted as Fundiseius Muma & Denmark, 1970 † · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Phytoseiidae (Family)

Megaera
     Megaera Wagler, 1830 accepted as Megaera Wagler, 1830 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Viperidae (Family)
     Megaera Robineau-Desvoidy, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Sarcophagidae (Family)
 Megaera Temminck, 1841 accepted as Megaerops Peters, 1867 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Chiroptera (Order) > Pteropodidae (Family)
 Megaera Simon, 1877 accepted as Medmassa Simon, 1887 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Corinnidae (Family)

Megagnathus
     Megagnathus Billberg, 1820 accepted as Megagnathus Billberg, 1820 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Megagnathus Dejean, 1821 accepted as Megagnathus Dejean, 1821 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cucujidae (Family)
 Megagnathus Redtenbacher, 1845 accepted as Prostomis Latreille, 1819 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cucujidae (Family)

Megahippus
     Megahippus McGrew, 1938 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Perissodactyla (Order) > Equidae (Family)
 Megahippus de Paula Couto, 1981 † accepted as · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Notoungulata (Order) > Notoungulata (awaiting allocation) (Family)

Megaiulus
     Megaiulus Verhoeff, 1894 accepted as Megaiulus Verhoeff, 1894 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Myriapoda (awaiting allocation) (Class) > Myriapoda (awaiting allocation) (Order) > Myriapoda (awaiting allocation) (Family)
     Megaiulus Verhoeff, 1893 accepted as Megaiulus Verhoeff, 1893 · Animalia (Kingdom) > Arthropoda (Phylum) > Myriapoda (awaiting allocation) (Class) > Myriapoda (awaiting allocation) (Order) > Myriapoda (awaiting allocation) (Family)

Megajapyx
 Megajapyx Kratochvíl, 1946 accepted as Megajapyx Verhoeff, 1904 · Animalia (Kingdom) > Arthropoda (Phylum) > Diplura (Class) > (Order) > Japygidae (Family)
     Megajapyx Verhoeff, 1904 · Animalia (Kingdom) > Arthropoda (Phylum) > Diplura (Class) > (Order) > Japygidae (Family)

Megalaspis
     Megalaspis Grube, 1859 accepted as Megalaspis Grube, 1859 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Arachnida (awaiting allocation) (Order) > Arachnida (awaiting allocation) (Family)
     Megalaspis Bleeker, 1851 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Carangidae (Family)
 Megalaspis Angelin, 1851 † accepted as Megistaspis Jaanusson, 1956 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Asaphida (Order) > Asaphidae (Family)

Megalestes
     Megalestes Salvadori, 1875 accepted as Megalestes Salvadori, 1875 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Megalestes Selys, 1862 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Chlorolestidae (Family)

Megaloba
 Megaloba accepted as Mygalobas Chevrolat, 1862 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Megaloba Warren, 1906 accepted as Tympanota Warren, 1895 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Megalocephala
 Megalocephala Tilesius, 1850 accepted as Megacephala Latreille, 1802-03 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Megalocephala Gistel, 1856 accepted as Megacephala Latreille, 1802-03 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Megalocera
     Megalocera Guérin-Ménéville in Duperry, 1838 accepted as Megalocera Guérin-Ménéville in Duperry, 1838 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Megalocera Hope, 1842 accepted as Megalocera Hope, 1842 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)

Megalocercus
     Megalocercus Duméril, 1859 accepted as Megalocercus Duméril, 1859 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
     Megalocercus Chun, 1887 · Animalia (Kingdom) > Chordata (Phylum) > Appendicularia (Class) > Copelata (Order) > Oikopleuridae (Family)

Megaloceros
     Megaloceros Brookes, 1827 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Cervidae (Family)
 Megaloceros Pictet, 1853 † accepted as Megaloceros Brookes, 1827 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Cervidae (Family)

Megalodes
     Megalodes Guenée, 1852 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
 Megalodes Lesne, 1896 accepted as Megaloodes Lesne, 1896 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Megalodon
     Megalodon Brullé, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)
     Megalodon Sowerby, 1827 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Megalodontida (Order) > Megalodontidae (Family)
     Megalodon Agassiz in Mantell, 1834 † accepted as Megalodon Agassiz in Mantell, 1834 † · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
     Megalodon Agassiz, 1835 † accepted as Megalodon Agassiz, 1835 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)

Megalodonta
     Megalodonta E.L. Greene, 1901 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Megalodonta Goldfuss, 1832 † accepted as Megalodonta Goldfuss, 1832 † (Misspelling) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Megalodontida (Order) > Megalodontidae (Family)

Megalodus
 Megalodus Goldfuss, 1837 † accepted as Megalodus Goldfuss, 1837 † (Unjustified (?) emendation) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Megalodontida (Order) > Megalodontidae (Family)
 Megalodus Rafinesque, 1815 accepted as Megalodontes Latreille, 1802-03 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Megalodontesidae (Family)

Megalographa
     Megalographa Lafontaine & Poole, 1991 accepted as Megalographa Lafontaine & Poole, 1991 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
 Megalographa A. Massalongo, 1860 accepted as Phaeographina J. Müller Arg., 1882 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Ostropales (Order) > Graphidaceae (Family)

Megalomma
     Megalomma Johansson, 1926 · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Sabellida (Order) > Sabellidae (Family)
     Megalomma Westwood, 1841 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
     Megalomma Smith, 1873 accepted as Megalomma Smith, 1873 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Crabronidae (Family)

Megalomus
     Megalomus Rambur, 1842 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Neuroptera (Order) > Hemerobiidae (Family)
     Megalomus Hall, 1852 † accepted as Megalomus Hall, 1852 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Hippuritida (Order) > Lyrodesmatidae (Family)

Megalomys
     Megalomys Trouessart, 1881 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Rodentia (Order) > Cricetidae (Family)
 Megalomys Fischer, 1886 † accepted as Megalomys Fischer, 1886 † (Unjustified (?) emendation) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Hippuritida (Order) > Lyrodesmatidae (Family)
 Megalomys Trouessart, 1903 † accepted as Megamys d'Orbigny, 1842 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Rodentia (Order) > Chinchillidae (Family)

Megalonix
 Megalonix Lesson, 1832 accepted as Megalonix Lesson, 1832 (Misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Megalonix Mitchill, 1824 † accepted as Megalonyx Jefferson, 1799 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Pilosa (Order) > Megalonychidae (Family)

Megalonyx
     Megalonyx Lesson, 1832 accepted as Megalonyx Lesson, 1832 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Megalonyx Jefferson, 1799 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Pilosa (Order) > Megalonychidae (Family)

Megalopastas
     Megalopastas Vacelet, 1958 · Animalia (Kingdom) > Porifera (Phylum) > Demospongea (Class) > Dendroceratida (Order) > Dictyodendrillidae (Family)
 Megalopastas Dendy in Herdman, 1905 accepted as Spongionella Bowerbank, 1862 (junior synonym) · Animalia (Kingdom) > Porifera (Phylum) > Demospongea (Class) > Dendroceratida (Order) > Dictyodendrillidae (Family)

Megalophrys
 Megalophrys Waterhouse, 1845 accepted as Peltolobus Lacordaire, 1859 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Megalophrys Kuhl & Hasslet, 1822 accepted as Megophrys Kuhl, 1822 · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Anura (Order) > Megophryidae (Family)

Megalophthalmus
 Megalophthalmus Leach, 1830 accepted as Mysis Latreille, 1802 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Mysida (Order) > Mysidae (Family)
 Megalophthalmus Gray, 1832 accepted as Magnoculus McDermott, 1964 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Lampyridae (Family)
 Megalophthalmus Lorenz, 1906 † accepted as Grandioculus Cossmann, 1908 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Ptychopariida (Order) > Ptychopariida (awaiting allocation) (Family)

Megaloprepes
     Megaloprepes Bigot, 1859 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Calliphoridae (Family)
 Megaloprepes Thomson, 1862 accepted as Cyclommatus Parry, 1863 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Lucanidae (Family)

Megalops
     Megalops Rafinesque, 1815 accepted as Megalops Rafinesque, 1815 · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
     Megalops Hallowell, 1860 accepted as Megalops Hallowell, 1860 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Colubridae (Family)
     Megalops Lacepède, 1803 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Elopiformes (Order) > Megalopidae (Family)
 Megalops Erichson, 1840 accepted as Megalopinus Eichelbaum, 1915 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
     Megalops Dejean, 1833 accepted as Megalopinus Eichelbaum, 1915 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Megalops H. Milne Edwards, 1837 accepted as Carcinus Leach, 1814 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Carcinidae (Family)

Megalopsis
     Megalopsis Panampunnayil, 1987 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Mysida (Order) > Mysidae (Family)
     Megalopsis Qian, 1983 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Ptychopariida (Order) > Ptychopariida (awaiting allocation) (Family)

Megaloptera
     Megaloptera · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Megaloptera (Order) > (Family)
     Megaloptera Bethune-Baker, 1908 accepted as Megaloptera Bethune-Baker, 1908 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Megaloptera Ashmead, 1899 accepted as Megaloptera Ashmead, 1899 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Halictidae (Family)

Megalopteris
     Megalopteris (J.W. Dawson) E.B. Andrews, 1875 † · Plantae (Kingdom) > Tracheophyta (Phylum) > Pteridophyta/Pteridospermophyta (unclassified foliage) (Class) > Pteridophyta/Pteridospermophyta (awaiting allocation) (Order) > Pteridophytes/Pteridosperms (awaiting allocation) (Family)
 Megalopteris Schenk in F. von Richthofen, 1883 † accepted as Gigantopteris H. Yabe, 1904 † · Plantae (Kingdom) > Tracheophyta (Phylum) > Pteridospermopsida (Class) > Gigantopteridales (Order) > Gigantopteridaceae (Family)

Megalopterus
     Megalopterus Smith, 1836 accepted as Megalopterus Smith, 1836 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Passeres (awaiting allocation) (Family)
 Megalopterus Boie, 1826 accepted as Anous Stephens in Shaw, 1826 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Charadriiformes (Order) > Sternidae (Family)
 Megalopterus Kner, 1866 † accepted as Flugopterus Whitley, 1951 † · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Pachycormiformes (Order) > Pachycormiformes (awaiting allocation) (Family)

Megalopteryx
     Megalopteryx Trautschold, 1890 † accepted as Megalopteryx Trautschold, 1890 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
     Megalopteryx Martins-Neto & Vulcano, 1989 accepted as Megalopteryx Martins-Neto & Vulcano, 1989 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Neuroptera (Order) > Neuroptera (awaiting allocation) (Family)

Megalopus
     Megalopus Fabricius, 1801 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Megalopodidae (Family)
     Megalopus Risso, 1820 accepted as Megalopus Risso, 1820 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
 Megalopus K. Schumann, 1900 accepted as Psychotria Linnaeus, 1759 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)
 Megalopus Latreille in Cuvier, 1829 accepted as Carcinus Leach, 1814 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Carcinidae (Family)

Megalorhipis
 Megalorhipis Philippi, 1859 accepted as Rhipibruchus Bridwell, 1932 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
 Megalorhipis Lacordaire, 1857 accepted as Oxynopterus Hope, 1842 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)

Megalorhynchus
     Megalorhynchus Eyton, 1839 accepted as Megalorhynchus Eyton, 1839 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Megalorhynchus de Gregorio, 1930 † accepted as Gemmellaroia Cossmann, 1898 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Strophomenata (Class) > Productida (Order) > Gemmellaroiidae (Family)

Megalornis
     Megalornis Gray, 1841 accepted as Megalornis Gray, 1841 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Ciconiiformes (Order) > Ciconiidae (Family)
     Megalornis Owen, 1843 † accepted as Megalornis Owen, 1843 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Dinornithiformes (Order) > Dinornithidae (Family)
     Megalornis Seeley, 1866 accepted as Megalornis Seeley, 1866 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Megalosoma
     Megalosoma Fedrizzi, 1877 accepted as Megalosoma Fedrizzi, 1877 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Diplopoda (Class) > Chordeumatida (Order) > Craspedosomatidae (Family)
 Megalosoma Burmeister, 1847 accepted as Megasoma Kirby, 1825 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Megalosphecia
     Megalosphecia Le Cerf in Oberthuer, 1917 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sesiidae (Family)
     Megalosphecia Le Cerf in Oberthuer, 1916 accepted as Megalosphecia Le Cerf in Oberthuer, 1917 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sesiidae (Family)

Megalospora
     Megalospora J. Meyen in J. Meyen & Flotow, 1843 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Teloschistales (Order) > Megalosporaceae (Family)
 Megalospora Naumov, 1927 accepted as Cucurbitaria Gray, 1821 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Pleosporales (Order) > Cucurbitariaceae (Family)
 Megalospora A. Massalongo, 1852 accepted as Mycoblastus Norman, 1853 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Lecanorales (Order) > Mycoblastaceae (Family)

Megalostoma
     Megalostoma E.C. Leonard, 1940 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Acanthaceae (Family)
 Megalostoma accepted as Megalomastoma Swainson, 1840 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Architaenioglossa (Order) > Megalomastomatidae (Family)

Megalostomis
     Megalostomis Blanchard, 1845 accepted as Megalostomis Blanchard, 1845 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
     Megalostomis Dejean, 1835 accepted as Megalostomis Dejean, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
     Megalostomis Chevrolat, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Megalostylus
     Megalostylus Schönherr, 1840 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Megalostylus Chaudoir, 1842 accepted as Loxandrus Leconte, 1853 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Megalotheca
     Megalotheca F. von Mueller, 1873 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Restionaceae (Family)
     Megalotheca Karny, 1907 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)

Megalotis
     Megalotis Swainson, 1827 accepted as Megalotis Swainson, 1827 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Megalotis Illiger, 1811 accepted as Vulpes Frisch, 1775 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Canidae (Family)

Megaluracarus
     Megaluracarus Cassagne-Mejean, 1966 accepted as Megaluracarus Cassagne-Mejean, 1966 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Acari (awaiting allocation) (Order) > Acari (awaiting allocation) (Family)
 Megaluracarus Viets, 1911 accepted as Arrenurus Dugès, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Arrenuridae (Family)

Megalurus
     Megalurus Horsfield, 1821 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Sylviidae (Family)
     Megalurus Agassiz, 1833 † accepted as Megalurus Agassiz, 1833 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Amiiformes (Order) > Amiidae (Family)
 Megalurus Thon, 1900 accepted as Arrenurus Dugès, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Arrenuridae (Family)

Megamastus
     Megamastus Faust, 1895 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Megamastus Fiedler, 1935 accepted as Megamastodes Strand, 1935 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Megambonia
     Megambonia Meek, 1872 accepted as Megambonia Meek, 1872 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Megambonia Hall, 1859 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Modiomorphoida (Order) > Modiomorphoida (awaiting allocation) (Family)

Megamerus
     Megamerus Dugès, 1834 accepted as Megamerus Dugès, 1834 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Arachnida (awaiting allocation) (Order) > Arachnida (awaiting allocation) (Family)
     Megamerus MacLeay in King, 1826 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Megametopon
     Megametopon Alphéraky in Romanoff, 1892 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Megametopon Artigas, 1970 † accepted as Megametopon Artigas, 1970 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Asilidae (Family)
     Megametopon Giglio-Tos, 1891 accepted as Megametopon Giglio-Tos, 1891 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)

Megamyrmaekion
     Megamyrmaekion Reuss, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Gnaphosidae (Family)
     Megamyrmaekion Wider, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Gnaphosidae (Family)

Meganema
     Meganema Thomsen et al., 2006 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Alphaproteobacteria (Class) > Rhizobiales (Order) > Methylobacteriaceae (Family)
     Meganema Fraser, 1939 accepted as Meganema Fraser, 1939 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
     Meganema Conrad, 1868 accepted as Meganema Conrad, 1868 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Meganthropus
 Meganthropus von Königswald, 1941 † accepted as Homo Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Hominidae (Family)
 Meganthropus Weidenreich, 1944 † accepted as Homo Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Hominidae (Family)

Meganura
     Meganura Szépligeti, 1906 accepted as Meganura Szépligeti, 1906 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Meganura Handschin, 1942 accepted as Megalanura Ellis & Bellinger, 1973 · Animalia (Kingdom) > Arthropoda (Phylum) > Collembola (Class) > Poduromorpha (Order) > Neanuridae (Family)

Megapalpis
 Megapalpis Halbert, 1944 accepted as Torrenticola Piersig, 1896 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Torrenticolidae (Family)
 Megapalpis Halbert, 1944 accepted as Torrenticola Piersig, 1896 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Torrenticolidae (Family)

Megapalpus
     Megapalpus Macquart, 1834 accepted as Megapalpus Macquart, 1834 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
 Megapalpus Guillebeau, 1893 accepted as Megistopalpus Guillebeau, 1895 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Phalacridae (Family)
 Megapalpus Montrouzier, 1860 accepted as Megapselaphus Montrouz, 1860 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Melandryidae (Family)

Megapelia
     Megapelia Kaup in Jardine, 1851 accepted as Megapelia Kaup in Jardine, 1851 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Megapelia Kaup, 1836 accepted as Megapelia Kaup, 1836 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Columbiformes (Order) > Columbiformes (awaiting allocation) (Family)

Megapenthoides
     Megapenthoides Guryeva & Dolin, 1972 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)
     Megapenthoides Cobos, 1970 accepted as Megapenthoides Guryeva & Dolin, 1972 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)

Megaperca
 Megaperca accepted as Megapera Manter, 1934 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Echinostomida (Order) > Megaperidae (Family)
 Megaperca Hilgendorf, 1878 accepted as Stereolepis Ayres, 1859 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Polyprionidae (Family)

Megaphyllites
     Megaphyllites Mojsisovics, 1879 † accepted as Megaphyllites Mojsisovics, 1879 † · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Ceratitida (Order) > Megaphyllitidae (Family)
     Megaphyllites Mojsisovics, 1879 † · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Ceratitida (Order) > Megaphyllitidae (Family)

Megaphyllum
     Megaphyllum Soshkina, 1939 † accepted as Megaphyllum Soshkina, 1939 † (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
     Megaphyllum Verhoeff, 1894 · Animalia (Kingdom) > Arthropoda (Phylum) > Diplopoda (Class) > Julida (Order) > Julidae (Family)
 Megaphyllum R. Spruce ex H.E. Baillon, 1880 accepted as Pentagonia Bentham, 1844 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)

Megaphysothrips
     Megaphysothrips Ananthakrishnan, 1959 accepted as Megaphysothrips Ananthakrishnan, 1959 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Thysanoptera (Order) > Thysanoptera (awaiting allocation) (Family)
     Megaphysothrips Ramakrishna Ayyar & Margabandhu, 1939 accepted as Megaphysothrips Ramakrishna Ayyar & Margabandhu, 1939 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Thysanoptera (Order) > Thysanoptera (awaiting allocation) (Family)

Megaporus
     Megaporus Feng, 2006 † · Chromista (Kingdom) > Retaria (Phylum) > Polycystinea (Class) > Entactinaria (Order) > Entactiniidae (Family)
     Megaporus Brinck, 1944 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dytiscidae (Family)

Megapriapus
     Megapriapus Golvan, 1957 · Animalia (Kingdom) > Acanthocephala (Phylum) > Palaeacanthocephala (Class) > Echinorhynchida (Order) > Cavisomidae (Family)
     Megapriapus Golvan, Gracia-Rodrigo & Diaz-Ungria, 1964 · Animalia (Kingdom) > Acanthocephala (Phylum) > Palaeacanthocephala (Class) > Echinorhynchida (Order) > Cavisomidae (Family)

Megaproctus
     Megaproctus Brullé in Lepeletier, 1846 accepted as Megaproctus Brullé in Lepeletier, 1846 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Braconidae (Family)
 Megaproctus Chevrolat, 1840 accepted as Megacoelus Lacordaire, 1869 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Megaproctus Schönherr, 1838 accepted as Belorhynus Guérin-Ménéville, 1844 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Megaprosopus
     Megaprosopus Macquart, 1843 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
 Megaprosopus Reitter, 1908 accepted as Platyprosopus Mannerheim, 1831 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Megapselaphus
     Megapselaphus Montrouz, 1860 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Melandryidae (Family)
 Megapselaphus Gemminger in Gemminger & Harold, 1870 accepted as Megapselaphus Montrouz, 1860 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Melandryidae (Family)

Megaptera
     Megaptera Gray, 1846 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Cetacea (Order) > Balaenopteridae (Family)
     Megaptera Meek & Worthen, 1868 † accepted as Megaptera Meek & Worthen, 1868 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Tuarangiida (Order) > Myalinidae (Family)

Megaptynx
     Megaptynx Bonaparte, 1854 accepted as Megaptynx Bonaparte, 1854 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Megaptynx Bonaparte, 1854 accepted as Megaptynx Bonaparte, 1854 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Megapus
 Megapus Schlüter in Marck & Schlüter, 1868 † accepted as Cheirothrix Pictet & Humbert, 1866 † · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Aulopiformes (Order) > Cheirothricidae (Family)
 Megapus Neuman, 1880 accepted as Atractides Koch, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Hygrobatidae (Family)

Megara
     Megara Gray, 1840 accepted as Megara Gray, 1840 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
 Megara H. Adams & A. Adams, 1854 accepted as Lithasia Haldeman, 1840 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sorbeoconcha (Order) > Pleuroceridae (Family)

Megarhina
 Megarhina Macquart, 1838 accepted as Megarhinus Robineau-Desvoidy, 1827 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Culicidae (Family)
 Megarhina Walker, 1848 accepted as Megarhinus Robineau-Desvoidy, 1827 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Culicidae (Family)
 Megarhina Lepeletier & Serville, 1828 accepted as Helius Lepeletier & Serville, 1828 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tipulidae (Family)

Megarhinus
     Megarhinus Robineau-Desvoidy, 1827 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Culicidae (Family)
 Megarhinus Schönherr, 1833 accepted as Trigonocolus Lacordaire, 1863 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Megarhinus Schoenherr, 1835 accepted as Trigonocolus Lacordaire, 1863 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Megarhinus Rafinesque, 1820 accepted as Polyodon Lacepède, 1797 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Acipenseriformes (Order) > Polyodontidae (Family)

Megarhynchus
     Megarhynchus Laporte, 1832 accepted as Megarhynchus Laporte, 1832 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Megarhynchus Heine, 1860 accepted as Megarynchus Thunberg, 1824 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Tyrannidae (Family)
 Megarhynchus Gemmellaro, 1894 † accepted as Gemmellaroia Cossmann, 1898 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Strophomenata (Class) > Productida (Order) > Gemmellaroiidae (Family)

Megarrhamphus
     Megarrhamphus Laporte, 1832 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Pentatomidae (Family)
     Megarrhamphus Bergroth, 1891 accepted as Megarrhamphus Bergroth, 1891 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Megasaurus
     Megasaurus Gilmore, 1928 † accepted as Megasaurus Gilmore, 1928 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
     Megasaurus Rafinesque, 1815 accepted as Megasaurus Rafinesque, 1815 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)

Megascelis
     Megascelis Latreille in Cuvier, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
     Megascelis Shuckard, 1840 accepted as Megascelis Shuckard, 1840 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Megascelis Sturm, 1826 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
     Megascelis Dejean, 1821 accepted as Megascelis Latreille in Cuvier, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Megasemum
     Megasemum Aymard, 1856 † accepted as Megasemum Aymard, 1856 † · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Odonata (awaiting allocation) (Family)
     Megasemum Maneval, 1936 † accepted as Megasemum Maneval, 1936 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Odonata (awaiting allocation) (Family)
     Megasemum Kraatz, 1879 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Megasoma
     Megasoma Kirby, 1825 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
     Megasoma Boisduval in Feisthamel, 1832 accepted as Megasoma Boisduval in Feisthamel, 1832 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Megasphaera
     Megasphaera Rogosa, 1971 (Approved Lists, 1980) · Bacteria (Kingdom) > Firmicutes (Phylum) > Negativicutes (Class) > Veillonellales (Order) > Veillonellaceae (Family)
     Megasphaera Chen & Liu, 1986 † · Animalia (Kingdom) > Animalia (awaiting allocation) (Phylum) > Animalia (awaiting allocation) (Class) > Animalia (awaiting allocation) (Order) > Animalia (awaiting allocation) (Family)

Megaspidomorpha
 Megaspidomorpha Spaeth, 1943 accepted as Aspidimorpha Hope, 1840 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
 Megaspidomorpha Hincks, 1952 accepted as Aspidimorpha Hope, 1840 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Megaspis
     Megaspis Kaleniczenko, 1851 accepted as Megaspis Kaleniczenko, 1851 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Megaspis Macquart, 1842 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)
 Megaspis Schoenherr, 1833 accepted as Mecaspis Schönherr, 1823 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Megasternon
     Megasternon Gray, 1844 † accepted as Megasternon Gray, 1844 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
     Megasternon Gray, 1842 † accepted as Megasternon Gray, 1842 † · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)

Megasternum
     Megasternum Mulsant, 1844 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Hydrophilidae (Family)
 Megasternum Lydekker, 1889 † accepted as Megasternum Lydekker, 1889 † (Misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)

Megastes
     Megastes Guenée, 1854 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Crambidae (Family)
     Megastes Westwood in Doubleday & Westwood, 1851 accepted as Megastes Westwood in Doubleday & Westwood, 1851 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Brassolidae (Family)

Megastoma
     Megastoma Rafinesque, 1814 accepted as Megastoma Rafinesque, 1814 (unassessed) · Animalia (Kingdom) > Animalia (awaiting allocation) (Phylum) > Animalia (awaiting allocation) (Class) > Animalia (awaiting allocation) (Order) > Animalia (awaiting allocation) (Family)
     Megastoma Swainson, 1837 accepted as Megastoma Swainson, 1837 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Megastoma Wagner, 1907 accepted as Megastoma Wagner, 1907 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Cycloneritimorpha (Order) > Helicinidae (Family)
     Megastoma Scudder, 1882 accepted as Megastoma Scudder, 1882 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Gastropoda (awaiting allocation) (Order) > Gastropoda (awaiting allocation) (Family)
     Megastoma Morris & Lycett, 1851 accepted as Megastoma Morris & Lycett, 1851 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Megastoma Costa, 1850 accepted as Megastoma Costa, 1850 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
 Megastoma (Bentham) Bonnet & Barratte, 1895 accepted as Ogastemma R.K. Brummitt, 1982 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Boraginales (Order) > Boraginaceae (Family)
 Megastoma Grassi, 1881 accepted as Giardia Künstler, 1882 (junior homonym) · Protozoa (Kingdom) > Metamonada (Phylum) > Eopharyngea (Class) > Diplomonadida (Order) > Giardiidae (Family)

Megastomum
 Megastomum Sartirana, 1905 accepted as Megastomum Sartirana, 1905 (Misspelling) · Protozoa (Kingdom) > Metamonada (Phylum) > Eopharyngea (Class) > Diplomonadida (Order) > Hexamitidae (Family)
 Megastomum Schmarda, 1859 accepted as Telostomum Schmarda, 1859 (nomen oblitum) · Animalia (Kingdom) > Platyhelminthes (Phylum) > Turbellaria (Class) > Turbellaria (awaiting allocation) (Order) > Turbellaria (awaiting allocation) (Family)

Megateuthis
 Megateuthis Carus, 1880 accepted as Megateuthis Carus, 1880 (Unjustified (?) emendation) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Megateuthis Bayle, 1878 † accepted as Megateuthis Bayle, 1878 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Megateuthis Hilgendorf, 1880 † accepted as Architeuthis Steenstrup, 1857 (synonym) · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Teuthoidea (Order) > Architeuthidae (Family)

Megatheca
     Megatheca Warren, 1897 accepted as Megatheca Warren, 1897 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Megatheca H.N. Andrews, 1940 † accepted as Megatheca H.N. Andrews, 1940 † (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Pteridospermopsida (Class) > Pteridospermopsida (awaiting allocation) (Order) > Pteridospermopsida (awaiting allocation) (Family)

Megatoma
     Megatoma Herbst in Jablonsky, 1792 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dermestidae (Family)
 Megatoma Kugelann, 1792 accepted as Attagenus Latreille, 1802 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dermestidae (Family)
 Megatoma Háva, 2007 accepted as Megatoma Herbst in Jablonsky, 1792 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dermestidae (Family)
 Megatoma Dejean, 1821 accepted as Ctesias Stephens, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dermestidae (Family)

Megatracheloides
     Megatracheloides Lucas, 1920 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Megatracheloides Kissinger, 1968 accepted as Megatracheloides Lucas, 1920 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)

Megatrachelus
     Megatrachelus Motschoulsky, 1845 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Meloidae (Family)
 Megatrachelus Faust, 1889 accepted as Megatracheloides Lucas, 1920 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Megatrachelus Kissinger, 1968 accepted as Megatracheloides Lucas, 1920 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)

Megatrema
     Megatrema Sowerby, 1823 · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Sessilia (Order) > Pyrgomatidae (Family)
     Megatrema Cameron, 1907 accepted as Megatrema Cameron, 1907 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Ichneumonidae (Family)
     Megatrema Mayr, 1865 accepted as Megatrema Mayr, 1865 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Megatrichoniscus
     Megatrichoniscus Jackson, 1938 accepted as Megatrichoniscus Jackson, 1938 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Crustacea (awaiting allocation) (Class) > Crustacea (awaiting allocation) (Order) > Crustacea (awaiting allocation) (Family)
     Megatrichoniscus Brian, 1921 accepted as Megatrichoniscus Brian, 1921 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Crustacea (awaiting allocation) (Class) > Crustacea (awaiting allocation) (Order) > Crustacea (awaiting allocation) (Family)

Megera
     Megera Temminck, 1841 accepted as Megera Temminck, 1841 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)
 Megera Lioy, 1895 accepted as Megaera Robineau-Desvoidy, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Sarcophagidae (Family)

Megerlea
     Megerlea Robineau-Desvoidy, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Sarcophagidae (Family)
 Megerlea Davidson, 1856 † accepted as Megerlia King, 1850 · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Terebratulida (Order) > Kraussinidae (Family)

Meggittia
     Meggittia Ray, 1977 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Pseudomelatomidae (Family)
 Meggittia López-Neyra, 1929 accepted as Paroniella Fuhrmann, 1920 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Cestoda (Class) > Cyclophyllidea (Order) > Davaineidae (Family)

Megilla
     Megilla Fabricius, 1805 accepted as Megilla Fabricius, 1805 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Megilla Mulsant, 1850 accepted as Hippodamia Dejean, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coccinellidae (Family)
 Megilla Erichson in Ménétriés, 1849 accepted as Coleomegilla Cockerell, 1920 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coccinellidae (Family)

Megischia
     Megischia Solier, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Megischia Redtenbacher, 1845 accepted as Megischia Solier, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Megistogaster
     Megistogaster Macquart, 1851 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
 Megistogaster Hagen, 1849 accepted as Mecistogaster Rambur, 1842 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Pseudostigmatidae (Family)

Megistopus
     Megistopus Rambur, 1842 accepted as Megistopus Rambur, 1842 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Neuroptera (Order) > Myrmeleontidae (Family)
     Megistopus Landois, 1894 accepted as Megistopus Landois, 1894 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)

Megophthalmus
     Megophthalmus Curtis, 1833 accepted as Megophthalmus Curtis, 1833 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadellidae (Family)
     Megophthalmus Curtis, 1831 accepted as Megophthalmus Curtis, 1831 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadellidae (Family)

Mehdinema
     Mehdinema Farooqui, 1967 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Diplogasterida (Order) > Diplogasteridae (Family)
 Mehdinema Baqri & Jana, 1980 accepted as Sicaguttur Siddiqi, 1970 · Animalia (Kingdom) > Nematoda (Phylum) > Dorylaimea (Class) > Dorylaimida (Order) > Dorylaimidae (Family)

Mehelya
     Mehelya Csiki, 1903 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Colubridae (Family)
     Mehelya Popov, 1939 accepted as Mehelya Popov, 1939 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Meinertia
     Meinertia Bollman, 1893 accepted as Meinertia Bollman, 1893 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Chilopoda (Class) > Geophilida (Order) > Dignathodontidae (Family)
 Meinertia Stebbing, 1893 accepted as Ceratothoa Dana, 1852 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Cymothoidae (Family)

Meinus
     Meinus Rafinesque, 1815 accepted as Meinus Rafinesque, 1815 · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Amphibia (awaiting allocation) (Order) > Amphibia (awaiting allocation) (Family)
 Meinus Dubois & Raffaelli, 2009 accepted as Lissotriton Bell, 1839 · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Caudata (Order) > Salamandridae (Family)

Meiostoma
     Meiostoma Sandon, 1941 · Chromista (Kingdom) > Ciliophora (Phylum) > Prostomatea (Class) > Prostomatida (Order) > Buetschliidae (Family)
 Meiostoma Andrássy, 2007 accepted as Mukhina Özdikmen, 2010 (junior homonym) · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Panagrolaimida (Order) > Panagrolaimidae (Family)

Meira
     Meira Boekhout, Scorzetti, Gerson & Sztejnberg, 2003 · Fungi (Kingdom) > Basidiomycota (Phylum) > Exobasidiomycetes (Class) > Exobasidiomycetidae incertae sedis (Order) > Exobasidiomycetidae incertae sedis (Family)
 Meira Cameron, 1910 accepted as Meira Cameron, 1910 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Tiphiidae (Family)
     Meira Jacquelin-Duval, 1852 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Meisteria
     Meisteria Scopoli, 1777 accepted as Meisteria Scopoli, 1777 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Meisteria Siebold & Zuccarini, 1846 accepted as Enkianthus Loureiro, 1790 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Ericaceae (Family)
 Meisteria Scopoli ex J.F. Gmelin, 1791 accepted as Poraqueiba Aublet, 1775 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Metteniusales (Order) > Metteniusaceae (Family)

Meitanella
     Meitanella Lin & Yin, 1978 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Redlichiida (Order) > Redlichiida (awaiting allocation) (Family)
     Meitanella Lin & Yin in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 † accepted as Meitanella Lin & Yin in Zhang, Lu, Zhu, Qian, Lin, Zhou, Zhang & Yuan, 1980 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)

Meitania
     Meitania Yuan, 1978 † accepted as Meitania Yuan, 1978 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)
     Meitania Yuan in Zhang † accepted as Meitania Yuan in Zhang † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)

Mekongia
     Mekongia Crosse & P. Fischer, 1876 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Architaenioglossa (Order) > Viviparidae (Family)
 Mekongia Uvarov, 1925 accepted as Mekongiana Uvarov, 1940 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Pyrgomorphidae (Family)

Meladendron
 Meladendron Molina, 1810 accepted as Heliotropium Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Boraginales (Order) > Boraginaceae (Family)
 Meladendron Saint-Lager, 1880 accepted as Melaleuca Linnaeus, 1767 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Myrtaceae (Family)

Meladerma
 Meladerma Swainson, 1839 accepted as Rachycentron Kaup, 1826 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Rachycentridae (Family)
 Meladerma Kerr, 1938 accepted as Finlaysonia Wallich, 1831 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Apocynaceae (Family)

Melaleuca
     Melaleuca Van der Wulp, 1891 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
     Melaleuca Linnaeus, 1767 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Myrtaceae (Family)
 Melaleuca Patouillard, 1887 accepted as Melanoleuca Patouillard, 1897 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Agaricales (Order) > Tricholomataceae (Family)

Melampus
     Melampus Gray, 1865 accepted as Melampus Gray, 1865 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)
     Melampus Montfort, 1810 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Ellobiida (Order) > Ellobiidae (Family)

Melanaetus
     Melanaetus Roberts, 1922 accepted as Melanaetus Roberts, 1922 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Melanaetus accepted as Melanaethus Uhler, 1875 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cydnidae (Family)

Melanaporus
     Melanaporus Priesner, 1967 accepted as Melanaporus Priesner, 1967 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Melanaporus Ashmead, 1902 accepted as Melanaporus Ashmead, 1902 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Melanchroea
 Melanchroea Agassiz, 1846 accepted as Melanchroia Hübner, 1819 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
 Melanchroea accepted as Melanochroea Kraatz, 1900 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Melancrus
     Melancrus Dejean, 1834 accepted as Melancrus Dejean, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Melancrus Reiche & Saulcy, 1857 accepted as Oxycara Solier, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Melanea
 Melanea Sowerby, 1818 accepted as Melanea Sowerby, 1818 (Misspelling) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sorbeoconcha (Order) > Thiaridae (Family)
 Melanea C.H. Persoon, 1805 accepted as Malanea Aublet, 1775 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)

Melanella
     Melanella Bowdich, 1822 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Ptenoglossa (Order) > Eulimidae (Family)
     Melanella Bory de St. Vincent, 1827 accepted as Melanella Bory de St. Vincent, 1827 (unassessed) · Protozoa (Kingdom) > (Phylum) > Protozoa (awaiting allocation) (Class) > (Order) > (Family)
     Melanella Wade, 1911 † · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Ostracoda (awaiting allocation) (Order) > Ostracoda incertae sedis (Family)
 Melanella Swainson, 1840 accepted as Amphimelania P. Fischer, 1885 (invalid: junior homonym of Melanella Bowdich, 1822 [Eulimidae]; Amphimelania is a replacement name.) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sorbeoconcha (Order) > Melanopsidae (Family)

Melanesthes
     Melanesthes Diakonoff, 1954 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Cosmopterigidae (Family)
     Melanesthes Dejean, 1834 accepted as Melanesthes Dejean, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Melanesthes Faldermann, 1835 accepted as Melanesthes Faldermann, 1835 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Melanesthes Lacordaire · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Melania
     Melania Wallengren, 1863 accepted as Melania Wallengren, 1863 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Arctiidae (Family)
     Melania Sodovsky, 1837 accepted as Melania Sodovsky, 1837 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Satyridae (Family)
     Melania Distant, 1901 accepted as Melania Distant, 1901 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Melania Meigen, 1838 accepted as Melanota Rondani, 1857 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
 Melania Lamarck, 1799 accepted as Thiara Röding, 1798 (objective synonym of Thiara) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sorbeoconcha (Order) > Thiaridae (Family)
     Melania Caziot, 1910 accepted as Melania Caziot, 1910 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Helicidae (Family)
     Melania Perry, 1811 accepted as Melania Perry, 1811 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Melanichthys
 Melanichthys Agassiz, 1846 accepted as Melanichthys Agassiz, 1846 (Unjustified (?) emendation) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Stomiiformes (Order) > Sternoptychidae (Family)
 Melanichthys Temminck & Schlegel in Siebold, 1844 accepted as Girella Gray, 1835 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Kyphosidae (Family)

Melaniella
     Melaniella R. Bauer, Vánky, Begerow & Oberwinkler, 1999 · Fungi (Kingdom) > Basidiomycota (Phylum) > Exobasidiomycetes (Class) > Doassansiales (Order) > Melaniellaceae (Family)
     Melaniella Fox, 1984 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Cimolesta (Order) > Ptolemaiidae (Family)
     Melaniella Pfeiffer, 1857 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Oleacinidae (Family)
 Melaniella Paetel, 1888 accepted as Melaniella Paetel, 1888 (Misspelling) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Melaniella Fischer, 1887 accepted as Melanella Bowdich, 1822 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Ptenoglossa (Order) > Eulimidae (Family)

Melanites
     Melanites Krueger, 1823 accepted as Melanites Krueger, 1823 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Melanites Agassiz, 1846 accepted as Melanites Agassiz, 1846 (Unjustified (?) emendation) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Melanites Rafinesque, 1818 accepted as Melanites Rafinesque, 1818 · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Melanium
     Melanium Busch in Philippi, 1842 accepted as Melanium Busch in Philippi, 1842 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Melanium P. Browne, 1756 accepted as Cuphea P. Browne, 1756 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Lythraceae (Family)

Melanius
 Melanius Dejean, 1828 accepted as Pterostichus Bonelli, 1810 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Melanius Bonelli, 1810 accepted as Pterostichus Bonelli, 1810 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Melanobaris
     Melanobaris Alonso-Zarazaga & Lyal, 1999 accepted as Melanobaris Alonso-Zarazaga & Lyal, 1999 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Melanobaris Zaslavskii, 1956 accepted as Melanobaris Zaslavskii, 1956 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)

Melanoboris
     Melanoboris Alonso-Zarazaga & Lyal, 1999 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Melanoboris Zaslavskij, 1956 accepted as Melanoboris Alonso-Zarazaga & Lyal, 1999 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Melanochaeta
     Melanochaeta Bezzi, 1906 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Chloropidae (Family)
     Melanochaeta E. Müller, J. Harr & P. Sulmont, 1969 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Chaetosphaeriales (Order) > Chaetosphaeriaceae (Family)

Melanochlamys
     Melanochlamys Cheeseman, 1881 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Cephalaspidea (Order) > Aglajidae (Family)
 Melanochlamys H. Sydow & P. Sydow in O. Fuhrmann & E. Mayor, 1914 accepted as Gilletiella P.A. Saccardo & P. Sydow, 1899 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Dothideomycetes incertae sedis (Order) > Dothideomycetes incertae sedis (Family)

Melanochroa
     Melanochroa Röder, 1886 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Stratiomyidae (Family)
     Melanochroa Yoshiyasu, 1985 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Crambidae (Family)
 Melanochroa Broun, 1882 accepted as Cyclaxyra Broun, 1893 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Phalacridae (Family)

Melanococcyx
     Melanococcyx Wuerttemberg, 1857 accepted as Melanococcyx Wuerttemberg, 1857 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Melanococcyx Heuglin, 1867 accepted as Melanococcyx Heuglin, 1867 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Melanocoma
     Melanocoma Harrison, 1910 accepted as Melanocoma Harrison, 1910 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Melanocoma Wollaston, 1867 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Melanocoris
     Melanocoris Champion, 1900 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Anthocoridae (Family)
 Melanocoris Marshall, 1868 accepted as Corimelaena White, 1839 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cydnidae (Family)

Melanocryptus
     Melanocryptus Cameron, 1902 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Ichneumonidae (Family)
     Melanocryptus Linnavuori, 1982 accepted as Melanocryptus Linnavuori, 1982 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Melanodactylus
     Melanodactylus Baudon, 1963 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)
 Melanodactylus Bleeker, 1858 accepted as Chrysichthys Bleeker, 1858 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Siluriformes (Order) > Claroteidae (Family)

Melanodes
     Melanodes Guenée, 1857 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
 Melanodes Chaudoir, 1876 accepted as Melanchiton Andrewes, 1940 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Melanodesmus
     Melanodesmus Carl, 1914 accepted as Melanodesmus Carl, 1914 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Myriapoda (awaiting allocation) (Class) > Myriapoda (awaiting allocation) (Order) > Myriapoda (awaiting allocation) (Family)
 Melanodesmus Loomis, 1941 accepted as Jeekelia Loomis, 1950 · Animalia (Kingdom) > Arthropoda (Phylum) > Diplopoda (Class) > Polydesmida (Order) > Pyrgodesmidae (Family)

Melanodiscus
     Melanodiscus F. von Höhnel, 1918 · Fungi (Kingdom) > Ascomycota (Phylum) > Ascomycota incertae sedis (Class) > Ascomycota incertae sedis (Order) > Ascomycota incertae sedis (Family)
 Melanodiscus Radlkofer in T. Durand, 1887 accepted as Glenniea J.D. Hooker in Bentham & J.D. Hooker, 1862 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Sapindales (Order) > Sapindaceae (Family)

Melanogaster
     Melanogaster Rondani, 1857 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)
     Melanogaster Corda in J. Sturm, 1831 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Boletales (Order) > Paxillaceae (Family)
     Melanogaster Corda, 1831 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Boletales (Order) > Paxillaceae (Family)

Melanoglena
     Melanoglena E.V. Eichwald, 1849 accepted as Melanoglena E.V. Eichwald, 1849 (unassessed) · Plantae (Kingdom) > Algae (awaiting allocation) (Phylum) > Algae (awaiting allocation) (Class) > Algae (awaiting allocation) (Order) > Algae (awaiting allocation) (Family)
     Melanoglena Eichwald in Diesing, 1850 accepted as Melanoglena Eichwald in Diesing, 1850 (unassessed) · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Trematoda (awaiting allocation) (Order) > Trematoda (awaiting allocation) (Family)

Melanoides
     Melanoides Adams, 1854 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sorbeoconcha (Order) > Thiaridae (Family)
     Melanoides Olivier, 1804 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sorbeoconcha (Order) > Thiaridae (Family)

Melanolepis
     Melanolepis Dyar, 1928 accepted as Melanolepis Dyar, 1928 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
     Melanolepis H.G.L. Reichenbach ex Zollinger, 1856 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Euphorbiaceae (Family)

Melanolestes
     Melanolestes Stål, 1866 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Reduviidae (Family)
     Melanolestes Selys, 1871 accepted as Melanolestes Selys, 1871 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Odonata (awaiting allocation) (Family)

Melanoleuca
     Melanoleuca Stephens, 1829 accepted as Melanoleuca Stephens, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Melanoleuca St.-Lag. accepted as Melaleuca Linnaeus, 1767 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Myrtaceae (Family)
     Melanoleuca Patouillard, 1897 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Agaricales (Order) > Tricholomataceae (Family)
     Melanoleuca Morris in Wood, 1837 accepted as Melanoleuca Morris in Wood, 1837 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Melanoloma
     Melanoloma Loew, 1873 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Richardiidae (Family)
     Melanoloma Cassini in F. Cuvier, 1823 accepted as Melanoloma Cassini in F. Cuvier, 1823 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Melanolophus
     Melanolophus Roberts, 1922 accepted as Melanolophus Roberts, 1922 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Melanolophus Fairmaire in Révoil, 1882 accepted as Melanolophus Fairmaire in Révoil, 1882 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)

Melanomia
     Melanomia Pauly, 1990 accepted as Melanomia Pauly, 1990 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Halictidae (Family)
     Melanomia Pauly, 1991 accepted as Melanomia Pauly, 1991 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Halictidae (Family)

Melanomma
     Melanomma Nitschke ex Fuckel, 1870 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Pleosporales (Order) > Melanommataceae (Family)
     Melanomma Grote, 1875 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Melanomys
     Melanomys Thomas, 1902 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Rodentia (Order) > Cricetidae (Family)
 Melanomys Winter, 1983 accepted as Uromys Peters, 1867 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Rodentia (Order) > Muridae (Family)

Melanonemotelus
     Melanonemotelus Lindner, 1937 accepted as Nemotelus Geoffroy, 1762 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Stratiomyidae (Family)
 Melanonemotelus Hanson, 1958 accepted as Nemotelus Geoffroy, 1762 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Stratiomyidae (Family)
     Melanonemotelus Szilady, 1941 accepted as Nemotelus Geoffroy, 1762 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Stratiomyidae (Family)

Melanopelta
     Melanopelta Shishkin, 1967 † accepted as Melanopelta Shishkin, 1967 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Temnospondyli (Order) > Plagiosauridae (Family)
 Melanopelta Kirschstein, 1939 accepted as Gnomonia Cesati & De Notaris, 1863 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Diaporthales (Order) > Gnomoniaceae (Family)

Melanopenthea
     Melanopenthea Breuning, 1942 accepted as Melanopenthea Breuning, 1942 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Melanopenthea Breuning, 1961 accepted as Penthea Laporte in Brullé, 1840 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Melanophora
     Melanophora Meigen, 1803 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Rhinophoridae (Family)
 Melanophora Koch in Panzer, 1833 accepted as Zelotes Gistl, 1848 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Gnaphosidae (Family)
 Melanophora J.A. von Arx, 1957 accepted as Elsinoe Raciborski, 1900 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Myriangiales (Order) > Elsinoaceae (Family)

Melanophthalma
     Melanophthalma Motschoulsky, 1866 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Latridiidae (Family)
 Melanophthalma Hampson, 1926 accepted as Marojala Viette, 1966 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Melanophyllum
     Melanophyllum Gorsky, 1951 † · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Rugosa (Order) > Rugosa (awaiting allocation) (Family)
     Melanophyllum Velenovský, 1921 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Agaricales (Order) > Agaricaceae (Family)

Melanopis
     Melanopis Hampson · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
 Melanopis Bergroth, 1905 accepted as Oropsime Gozis, 1881 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Latridiidae (Family)

Melanopitta
     Melanopitta Bonaparte, 1854 accepted as Melanopitta Bonaparte, 1854 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Melanopitta Bonaparte, 1854 accepted as Melanopitta Bonaparte, 1854 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Melanops
 Melanops Nitschke ex Fuckel, 1870 accepted as Botryosphaeria Cesati & G. De Notaris, 1863 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Botryosphaeriales (Order) > Botryosphaeriaceae (Family)
     Melanops Becker, 2014 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Notodontidae (Family)

Melanopsidium
     Melanopsidium Colla, 1824 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)
 Melanopsidium P.A. Poiteau ex A.P. de Candolle, 1830 accepted as Alibertia A. Richard ex A.P. de Candolle, 1830 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)

Melanopsis
     Melanopsis Férussac in Férussac & Férussac, 1807 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sorbeoconcha (Order) > Melanopsidae (Family)
 Melanopsis Gozis, 1875 accepted as Oropsime Gozis, 1881 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Latridiidae (Family)

Melanoptychia
 Melanoptychia Pavlovic, 1926 † accepted as Melanoptychia Pavlovic, 1926 † (Misspelling) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Melanoptychia Neumayr, 1880 † accepted as Melanopsis Férussac in Férussac & Férussac, 1807 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sorbeoconcha (Order) > Melanopsidae (Family)

Melanopus
     Melanopus Konow, 1897 accepted as Melanopus Konow, 1897 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Melanopus Patouillard, 1887 accepted as Polyporus P. Micheli ex Adanson, 1763 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Polyporales (Order) > Polyporaceae (Family)

Melanoseris
     Melanoseris Decaisne in Jacquemont, 1841-1843 accepted as Melanoseris Decaisne in Jacquemont, 1841-1843 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Melanoseris Zanardini, 1874 accepted as Pollexfenia Harvey, 1844 (synonym) · Plantae (Kingdom) > Rhodophyta (Phylum) > Florideophyceae (Class) > Ceramiales (Order) > Rhodomelaceae (Family)

Melanosoma
 Melanosoma Bonaparte, 1850 accepted as Melanosoma Bonaparte, 1850 (Misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Melanosoma Robineau-Desvoidy, 1853 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Conopidae (Family)
 Melanosoma Gilchrist, 1902 accepted as Melanonosoma Gilchrist, 1902 (misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Gadiformes (Order) > Melanonidae (Family)

Melanosphecia
     Melanosphecia Le Cerf in Oberthuer, 1917 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sesiidae (Family)
     Melanosphecia Le Cerf in Oberthuer, 1916 accepted as Melanosphecia Le Cerf in Oberthuer, 1917 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sesiidae (Family)

Melanospilus
     Melanospilus Stål, 1868 accepted as Melanospilus Stål, 1868 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Lygaeidae (Family)
 Melanospilus Westwood, 1847 accepted as Platyrhopalus Westwood, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Melanospora
 Melanospora W. Mudd, 1861 accepted as Poeltinula J. Hafellner, 1984 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Rhizocarpales (Order) > Rhizocarpaceae (Family)
     Melanospora Corda, 1837 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Melanosporales (Order) > Ceratostomataceae (Family)

Melanostigma
     Melanostigma Günther, 1881 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Zoarcidae (Family)
 Melanostigma Kirschstein, 1939 accepted as Capronia P.A. Saccardo, 1883 · Fungi (Kingdom) > Ascomycota (Phylum) > Eurotiomycetes (Class) > Chaetothyriales (Order) > Herpotrichiellaceae (Family)

Melanostola
     Melanostola Dejean, 1834 accepted as Melanostola Dejean, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Melanostola Sénac, 1887 accepted as Pimelia Fabricius, 1775 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Melanostoma
     Melanostoma Schiner, 1860 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)
     Melanostoma Stål, 1872 accepted as Melanostoma Stål, 1872 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Pentatomidae (Family)
 Melanostoma Döderlein in Steindachner & Döderlein, 1883 accepted as Synagrops Günther, 1887 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Acropomatidae (Family)

Melanotus
     Melanotus Erichson in Thon, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)
     Melanotus Eschscholtz, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)
 Melanotus Gistel, 1834 accepted as Cardiophorus Eschscholtz in Thon, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)
 Melanotus Patouillard, 1900 accepted as Psilocybe (E.M. Fries) P. Kummer, 1871 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Agaricales (Order) > Strophariaceae (Family)
 Melanotus Dejean, 1831 accepted as Polpochila Solier in Gay, 1849 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Melanoxanthus
     Melanoxanthus Eschscholtz, 1836 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)
     Melanoxanthus Buckton, 1879 accepted as Melanoxanthus Buckton, 1879 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Aphididae (Family)
     Melanoxanthus Dejean, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)

Melanthes
     Melanthes Mabille, 1904 accepted as Melanthes Mabille, 1904 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Hesperiidae (Family)
 Melanthes Blume accepted as Breynia J.R. Forster & J.G.A. Forster, 1775 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Phyllanthaceae (Family)

Melanthidium
     Melanthidium Cockerell, 1947 accepted as Melanthidium Cockerell, 1947 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Melanthidium Pasteels, 1969 † accepted as Melanthidium Pasteels, 1969 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Megachilidae (Family)

Melanthium
 Melanthium Medikus, 1789 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ranunculales (Order) > Ranunculaceae (Family)
 Melanthium Linnaeus, 1753 accepted as Veratrum Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Liliales (Order) > Melanthiaceae (Family)

Melantho
     Melantho Bowdich, 1822 accepted as Melantho Bowdich, 1822 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Architaenioglossa (Order) > Viviparidae (Family)
 Melantho Laporte, 1836 accepted as Crepicardus Candèze, 1857 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)

Melanura
     Melanura Baldamus, 1856 accepted as Melanura Baldamus, 1856 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Melanura Agassiz, 1853 accepted as Umbra Kramer in Scopoli, 1777 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Esociformes (Order) > Umbridae (Family)

Melaraphis
     Melaraphis Stentz in Philippi, 1836 accepted as Melaraphis Stentz in Philippi, 1836 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Melaraphis Schaufuss, 1869 accepted as Melarhaphe Menke, 1828 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Littorinidae (Family)

Melasma
     Melasma P.J. Bergius, 1767 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Orobanchaceae (Family)
 Melasma Wollaston, 1864 accepted as Melasmana Strand, 1935 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
     Melasma H. Adams & A. Adams, 1854 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sorbeoconcha (Order) > Thiaridae (Family)

Melasoma
     Melasoma Swainson, 1837 accepted as Melasoma Swainson, 1837 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Melasoma Stephens, 1831 accepted as Chrysomela Linnaeus, 1758 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Melatoma
     Melatoma Gray, 1847 accepted as Melatoma Gray, 1847 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Melatoma Swainson, 1840 accepted as Clionella Gray, 1847 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Clavatulidae (Family)

Melea
     Melea Sandhouse, 1943 accepted as Melea Sandhouse, 1943 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Melea accepted as Malea Valenciennes in Humboldt, 1832 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Tonnidae (Family)

Meleagris
     Meleagris Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Galliformes (Order) > Phasianidae (Family)
     Meleagris Montfort, 1810 accepted as Meleagris Montfort, 1810 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Meleagris Fischer-Waldheim, 1835 accepted as Pinctada Röding, 1798 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pterioida (Order) > Pteriidae (Family)

Melestora
     Melestora Stål, 1860 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Blattodea (Order) > Polyphagidae (Family)
 Melestora Hebard, 1920 accepted as Ceuthobiella Hebard, 1921 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Blattodea (Order) > Blattellidae (Family)

Meleus
     Meleus Frivaldsky, 1835 accepted as Meleus Frivaldsky, 1835 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
     Meleus Dejean, 1821 accepted as Plinthus Germar, 1817 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Melia
     Melia Curtis, 1828 accepted as Melia Curtis, 1828 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Pyralidae (Family)
     Melia Fischer, 1829 † accepted as Melia Fischer, 1829 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Orthocerida (Order) > Orthoceratidae (Family)
     Melia Albers, 1850 accepted as Melia Albers, 1850 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Gastropoda (awaiting allocation) (Order) > Gastropoda (awaiting allocation) (Family)
     Melia Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Sapindales (Order) > Meliaceae (Family)
 Melia Billberg, 1820 accepted as Melita Leach, 1814 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Melitidae (Family)
 Melia Gistel, 1848 accepted as Nardoa Gray, 1840 (Synonym according to Fisher (1919)) · Animalia (Kingdom) > Echinodermata (Phylum) > Asteroidea (Class) > Valvatida (Order) > Ophidiasteridae (Family)
 Melia Walker, 1855 accepted as Ilema Moore, 1858 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lymantriidae (Family)
 Melia Latreille in Berthold, 1827 accepted as Lybia H. Milne Edwards, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Xanthidae (Family)
 Melia Heinemann, 1866 accepted as Euzophera Zeller, 1867 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Pyralidae (Family)
     Melia Bosc in Risso, 1813 accepted as Melia Bosc in Risso, 1813 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Decapoda (awaiting allocation) (Family)
     Melia Robineau-Desvoidy, 1830 accepted as Melia Robineau-Desvoidy, 1830 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
     Melia Neumoegen, 1892 accepted as Melia Neumoegen, 1892 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Notodontidae (Family)

Melibaea
     Melibaea Robineau-Desvoidy, 1848 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
     Melibaea Saunders, 1859 accepted as Melibaea Saunders, 1859 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Melibaea Forbes, 1838 accepted as Melibe Rang, 1829 (incorrect subsequent spelling) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Nudibranchia (Order) > Tethydidae (Family)

Meliboea
 Meliboea Robineau-Desvoidy, 1863 accepted as Melibaea Robineau-Desvoidy, 1848 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
 Meliboea Forbes, 1838 accepted as Melibe Rang, 1829 (incorrect subsequent spelling [by Forbes, 1838] of Melibe Rang, 1829) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Nudibranchia (Order) > Tethydidae (Family)

Melicerta
 Melicerta Tilesius, 1831 accepted as Melicerta Tilesius, 1831 · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
 Melicerta Stephens, 1833 accepted as Melicerta Stephens, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Melicerta Risso, 1816 accepted as Lysmata Risso, 1816 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Hippolytidae (Family)
 Melicerta Schrank, 1803 accepted as Floscularia Cuvier, 1798 · Animalia (Kingdom) > Rotifera (Phylum) > Monogononta (Class) > Flosculariaceae (Order) > Flosculariidae (Family)
 Melicerta Péron & Lesueur, 1810 accepted as Melicertum sensu L. Agassiz, 1862 (preoccupied by Melicerta Schrank, 1803 [Rotatoria]) · Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Leptothecata (Order) > Melicertidae (Family)

Melicertum
     Melicertum Oken, 1815 · Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Leptothecata (Order) > Melicertidae (Family)
     Melicertum sensu L. Agassiz, 1862 · Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Leptothecata (Order) > Melicertidae (Family)
 Melicertum Goldfuss, 1820 accepted as Melicerta Péron & Lesueur, 1810 · Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Leptothecata (Order) > Mitrocomidae (Family)

Melicertus
     Melicertus Simon, 1864 accepted as Melicertus Simon, 1864 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Arachnida (awaiting allocation) (Order) > Arachnida (awaiting allocation) (Family)
 Melicertus Rafinesque, 1814 accepted as Penaeus Fabricius, 1798 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Penaeidae (Family)

Melicharella
     Melicharella Goding, 1930 accepted as Melicharella Goding, 1930 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Membracidae (Family)
     Melicharella Semenov, 1902 accepted as Melicharella Semenov, 1902 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Melichrus
     Melichrus R. Brown, 1810 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Ericaceae (Family)
 Melichrus Brenske, 1892 accepted as Hilyotrogus Fairmaire, 1886 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Melidora
     Melidora Lesson, 1830 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Coraciiformes (Order) > Halcyonidae (Family)
     Melidora Noronha ex R.A. Salisbury, 1817 accepted as Melidora Noronha ex R.A. Salisbury, 1817 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Ericaceae (Family)

Meligethiella
     Meligethiella Medvedev, 1969 † · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Trogossitidae (Family)
     Meligethiella Medvedev, 1969 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Nitidulidae (Family)

Melina
     Melina Dejean, 1835 accepted as Melina Dejean, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
     Melina Robineau-Desvoidy, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Sciomyzidae (Family)
 Melina Philipsson, 1788 accepted as Isognomon Lightfoot, 1786 (synonym) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pterioida (Order) > Pteriidae (Family)
 Melina Chapuis in Lacordaire, 1874 accepted as Colaspoides Laporte, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Melinaea
     Melinaea Bates, 1862 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Nymphalidae (Family)
 Melinaea Sodovsky, 1837 accepted as Melitaea Fabricius, 1807 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Nymphalidae (Family)
     Melinaea Hübner, 1816 accepted as Melinaea Hübner, 1816 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Danaidae (Family)

Melinda
     Melinda Robineau-Desvoidy, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Calliphoridae (Family)
     Melinda Moore, 1883 accepted as Melinda Moore, 1883 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Melindopsis
     Melindopsis Aurivillius, 1898 accepted as Melindopsis Aurivillius, 1898 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Melindopsis Kurahashi, 1964 accepted as Melindopsis Kurahashi, 1964 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Calliphoridae (Family)

Melinesthes
     Melinesthes Kraatz, 1880 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
 Melinesthes Péringuey, 1909 accepted as Mimesthes Marseul, 1873 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Meloidae (Family)

Melinia
     Melinia Ringdahl, 1929 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Anthomyiidae (Family)
     Melinia A. Costa in O. Costa, 1859 accepted as Melinia A. Costa in O. Costa, 1859 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Melinia Decaisne in Alph. de Candolle, 1844 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Apocynaceae (Family)

Meliniella
     Meliniella Suwa, 1974 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Anthomyiidae (Family)
 Meliniella accepted as Melliniella Harms, 1914 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)

Melinna
     Melinna Malmgren, 1866 · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Terebellida (Order) > Ampharetidae (Family)
     Melinna Uhler, 1887 accepted as Melinna Uhler, 1887 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Miridae (Family)

Melinum
     Melinum Medikus, 1791 accepted as Melinum Medikus, 1791 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Lamiaceae (Family)
 Melinum Link, 1829 accepted as Zizania Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Poaceae (Family)

Meliolaster
     Meliolaster F. von Höhnel, 1918 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Capnodiales (Order) > Asterinaceae (Family)
 Meliolaster Doidge, 1920 accepted as Amazonia Theissen, 1913 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Meliolales (Order) > Meliolaceae (Family)

Meliolinopsis
 Meliolinopsis Beeli, 1920 accepted as Meliolaster F. von Höhnel, 1918 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Capnodiales (Order) > Asterinaceae (Family)
 Meliolinopsis F.L. Stevens, 1924 accepted as Scolionema Theissen & H. Sydow, 1918 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Dothideomycetidae incertae sedis (Order) > Parodiopsidaceae (Family)

Melissa
     Melissa Smith, 1854 accepted as Melissa Smith, 1854 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Apidae (Family)
     Melissa Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Lamiaceae (Family)
 Melissa Strahl, 1861 accepted as Euxanthus Dana, 1851 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Xanthidae (Family)

Melissodes
     Melissodes Latreille in Cuvier, 1829 accepted as Melissodes Latreille in Cuvier, 1829 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Melissodes Berthold in Latreille, 1827 accepted as Melissodes Berthold in Latreille, 1827 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Melitaea
     Melitaea Fabricius, 1807 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Nymphalidae (Family)
 Melitaea Lamarck, 1816 accepted as Melitaea Lamarck, 1816 (Misspelling) · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Gorgonacea (Order) > Melithaeidae (Family)
 Melitaea Gistl, 1848 accepted as Melitaea Gistl, 1848 (Misspelling) · Animalia (Kingdom) > Cnidaria (Phylum) > Scyphozoa (Class) > Scyphozoa (awaiting allocation) (Order) > Scyphozoa (awaiting allocation) (Family)

Melitea
 Melitea Lamouroux, 1812 accepted as Melitea Lamouroux, 1812 · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Gorgonacea (Order) > Melithaeidae (Family)
     Melitea Péron & Lesueur, 1810 accepted as Melitea Péron & Lesueur, 1810 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Scyphozoa (Class) > Scyphozoa (awaiting allocation) (Order) > Scyphozoa (awaiting allocation) (Family)
     Melitea Urios, Agogue, Intertaglia, Lesongeur & Lebaron, 2008 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Alteromonadales (Order) > Alteromonadaceae (Family)

Melitella
     Melitella Gray, 1859 accepted as Melitella Gray, 1859 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Gorgonacea (Order) > Melithaeidae (Family)
 Melitella Gregory in Lankester, 1900 accepted as Melitella Gregory in Lankester, 1900 (Misspelling) · Animalia (Kingdom) > Echinodermata (Phylum) > Echinoidea (Class) > Clypeasteroida (Order) > Mellitidae (Family)
     Melitella Sommier, 1907 accepted as Melitella Sommier, 1907 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Melithea
 Melithea Milne-Edwards, 1857 accepted as Melithea Milne-Edwards, 1857 (Misspelling) · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Gorgonacea (Order) > Melithaeidae (Family)
     Melithea Selys, 1837 accepted as Melithea Selys, 1837 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Melithreptus
     Melithreptus Vieillot, 1816 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Meliphagidae (Family)
 Melithreptus Loew, 1840 accepted as Sphaerophoria Lepeletier & Serville, 1828 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)

Melitoides
     Melitoides Gurjanova, 1934 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Melitidae (Family)
     Melitoides Gurjanova, 1936 accepted as Melitoides Gurjanova, 1936 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Melitidae (Family)

Melitoma
     Melitoma Lepeletier & Serville, 1828 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Apidae (Family)
     Melitoma Berthold in Latreille, 1827 accepted as Melitoma Lepeletier & Serville, 1828 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Apidae (Family)

Melitonoma
     Melitonoma Dejean, 1835 accepted as Melitonoma Dejean, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Melitonoma Lacordaire, 1848 accepted as Melitonoma Lacordaire, 1848 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Melitonoma Chevrolat, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Melitta
     Melitta Kirby, 1802 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Melittidae (Family)
 Melitta Gistl, 1848 accepted as Mellita L. Agassiz, 1841 · Animalia (Kingdom) > Echinodermata (Phylum) > Echinoidea (Class) > Clypeasteroida (Order) > Mellitidae (Family)

Melittobia
     Melittobia Westwood, 1849 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Eulophidae (Family)
     Melittobia Westwood, 1848 accepted as Melittobia Westwood, 1849 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Eulophidae (Family)

Melittophagus
 Melittophagus Boie, 1828 accepted as Merops Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Coraciiformes (Order) > Meropidae (Family)
 Melittophagus Kirby & Spence, 1828 accepted as Meloe Linnaeus, 1758 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Meloidae (Family)

Melizophilus
     Melizophilus Leach, 1816 accepted as Melizophilus Leach, 1816 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Melizophilus Forster, 1817 accepted as Melizophilus Forster, 1817 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Mella
     Mella Vandelli, 1788 accepted as Mella Vandelli, 1788 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Scrophulariaceae (Family)
     Mella Walker, 1859 accepted as Mella Walker, 1859 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Mellia
     Mellia Meyrick, 1934 accepted as Mellia Meyrick, 1934 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Pyralidae (Family)
     Mellia Schmidt, 1920 accepted as Mellia Schmidt, 1920 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Mellia Fischer-Waldheim, 1844 accepted as Mellia Fischer-Waldheim, 1844 (Unjustified (?) emendation) · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Cephalopoda (awaiting allocation) (Order) > Cephalopoda (awaiting allocation) (Family)

Mellisuga
     Mellisuga Brisson, 1760 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Apodiformes (Order) > Trochilidae (Family)
     Mellisuga Vieillot, 1816 accepted as Mellisuga Vieillot, 1816 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Passeriformes (awaiting allocation) (Family)
     Mellisuga Rafinesque, 1815 accepted as Mellisuga Rafinesque, 1815 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Apodiformes (Order) > Trochilidae (Family)

Mellita
     Mellita L. Agassiz, 1841 · Animalia (Kingdom) > Echinodermata (Phylum) > Echinoidea (Class) > Clypeasteroida (Order) > Mellitidae (Family)
 Mellita Fabricius, 1823 accepted as Mellita Fabricius, 1823 (Suppressed name (ICZN)) · Animalia (Kingdom) > Echinodermata (Phylum) > Echinodermata (awaiting allocation) (Class) > Echinodermata (awaiting allocation) (Order) > Echinodermata (awaiting allocation) (Family)

Melloa
     Melloa Roewer, 1930 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Opiliones (Order) > Gonyleptidae (Family)
     Melloa Bureau, 1868 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Bignoniaceae (Family)
 Melloa Schenkel, 1953 accepted as Melloina Brignoli, 1985 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Paratropididae (Family)

Melloina
     Melloina Brignoli, 1985 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Paratropididae (Family)
 Melloina Amaral Campos, 1946 accepted as Colossoma Eigenmann & Kennedy, 1903 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Characiformes (Order) > Serrasalmidae (Family)

Melo
     Melo Broderip in Sowerby I, 1826 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Volutidae (Family)
 Melo P. Miller, 1754 accepted as Cucumis Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Cucurbitales (Order) > Cucurbitaceae (Family)

Melobesia
     Melobesia J.V.F. Lamouroux, 1812 · Plantae (Kingdom) > Rhodophyta (Phylum) > Florideophyceae (Class) > Corallinales (Order) > Hapalidiaceae (Family)
 Melobesia Foslie, 1898 accepted as Hydrolithon (Foslie) Foslie, 1909 (synonym) · Plantae (Kingdom) > Rhodophyta (Phylum) > Florideophyceae (Class) > Corallinales (Order) > Hapalidiaceae (Family)
 Melobesia Heydrich, 1897 accepted as Lithophyllum Philippi, 1837 · Plantae (Kingdom) > Rhodophyta (Phylum) > Florideophyceae (Class) > Corallinales (Order) > Hapalidiaceae (Family)

Melocactus
 Melocactus Boehmer in Ludwig, 1760 accepted as Melocactus Boehmer in Ludwig, 1760 (nomen rejiciendum) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Cactaceae (Family)
     Melocactus Link & Otto, 1827 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Cactaceae (Family)

Melochia
     Melochia Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malvales (Order) > Malvaceae (Family)
 Melochia Rottbøll, 1778 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Gentianales (awaiting allocation) (Family)

Melodes
     Melodes Keyserling & Blasius, 1840 accepted as Melodes Keyserling & Blasius, 1840 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Melodes Guenée, 1845 accepted as Melodes Guenée, 1845 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Melodorum
     Melodorum Loureiro, 1790 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Magnoliales (Order) > Annonaceae (Family)
 Melodorum (Dunal) J.D. Hooker & T. Thomson, 1855 accepted as Fissistigma W. Griffith, 1854 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Magnoliales (Order) > Annonaceae (Family)

Melolontha
     Melolontha Fabricius, 1775 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
 Melolontha Geoffroy, 1762 accepted as Clytra Laicharting, 1781 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Melongena
     Melongena Schumacher, 1817 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Melongenidae (Family)
 Melongena P. Miller, 1754 accepted as Solanum Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Solanales (Order) > Solanaceae (Family)

Melonia
 Melonia Schinz in Schinz-Cuvier, 1825 accepted as Melonia Schinz in Schinz-Cuvier, 1825 (Misspelling) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sorbeoconcha (Order) > Thiaridae (Family)
 Melonia Bronn, 1849 † accepted as Melonis de Montfort, 1808 · Chromista (Kingdom) > Retaria (Phylum) > Globothalamea (Class) > Rotaliida (Order) > Nonionidae (Family)
 Melonia Lamarck, 1822 accepted as Borelis de Montfort, 1808 (Opinion of Loeblich & Tappan, 1987) · Chromista (Kingdom) > Retaria (Phylum) > Tubothalamea (Class) > Miliolida (Order) > Alveolinidae (Family)

Melonites
     Melonites Norwood & Owen, 1846 † accepted as Melonites Norwood & Owen, 1846 † (unassessed) · Animalia (Kingdom) > Echinodermata (Phylum) > Echinoidea (Class) > Echinocystitoida (Order) > Palaechinidae (Family)
     Melonites Bogoslovskii, 1971 † · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Anarcestida (Order) > Anarcestida (awaiting allocation) (Family)
 Melonites Lamarck, 1812 accepted as Borelis de Montfort, 1808 (Opinion of Loeblich & Tappan, 1987) · Chromista (Kingdom) > Retaria (Phylum) > Tubothalamea (Class) > Miliolida (Order) > Alveolinidae (Family)

Melopyrrha
     Melopyrrha Gray, 1855 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Fringillidae (Family)
     Melopyrrha Bonaparte, 1853 accepted as Melopyrrha Gray, 1855 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Fringillidae (Family)

Melostrachia
     Melostrachia Iredale, 1938 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Camaenidae (Family)
     Melostrachia Solem, 1979 accepted as Melostrachia Solem, 1979 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Gastropoda (awaiting allocation) (Order) > Gastropoda (awaiting allocation) (Family)

Melpia
     Melpia Walker in Saunders, 1850 accepted as Melpia Walker in Saunders, 1850 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
     Melpia Stål, 1867 accepted as Melpia Stål, 1867 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Melpomene
     Melpomene A.R. Smith & R.C. Moran, 1992 · Plantae (Kingdom) > Tracheophyta (Phylum) > Polypodiopsida (Class) > Polypodiales (Order) > Polypodiaceae (Family)
     Melpomene Cambridge, 1898 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Agelenidae (Family)

Melusina
     Melusina Haeckel, 1880 accepted as Melusina Haeckel, 1880 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
 Melusina Meigen, 1800 accepted as Melusina Meigen, 1800 (Published in a suppressed work (ICZN)) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Simuliidae (Family)
 Melusina Stål, 1867 accepted as Melusina Stål, 1867 (Suppressed name (ICZN)) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Melybaeus
 Melybaeus Marseul, 1865 accepted as Meliboeus Deyrolle, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)
 Melybaeus Barthe, 1902 accepted as Meliboeus Deyrolle, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)

Membranicola
     Membranicola Foissner, Berger & Schaumburg, 1999 · Chromista (Kingdom) > Ciliophora (Phylum) > Ciliophora (awaiting allocation) (Class) > Ciliophora (awaiting allocation) (Order) > Ciliophora (awaiting allocation) (Family)
     Membranicola Li et al., 2016 · Bacteria (Kingdom) > Bacteroidetes (Phylum) > Saprospiria (Class) > Saprospirales (Order) > Saprospiraceae (Family)

Membranites
     Membranites Al-Ruwaili, 2000 † · Protozoa (Kingdom) > Acritarcha (Phylum) > Acritarcha (awaiting allocation) (Class) > Acritarcha (awaiting allocation) (Order) > Acritarcha (awaiting allocation) (Family)
     Membranites A. Fucini, 1938 † accepted as Membranites A. Fucini, 1938 † (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Rhizophoraceae (Family)

Membranolobus
     Membranolobus Dubinin, 1956 accepted as Membranolobus Dubinin, 1956 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Astigmata (Order) > Vexillariidae (Family)
     Membranolobus Gaud & Mouchet, 1959 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Astigmata (Order) > Vexillariidae (Family)
     Membranolobus Dubinin, 1953 accepted as Membranolobus Gaud & Mouchet, 1959 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Astigmata (Order) > Vexillariidae (Family)

Memina
 Memina Fischer de Waldheim, 1814 accepted as Chironectes Illiger, 1811 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Didelphimorphia (Order) > Didelphidae (Family)
 Memina Gray, 1821 accepted as Neotragus Smith, 1827 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Bovidae (Family)

Meminna
 Meminna Agassiz, 1842 accepted as Neotragus Smith, 1827 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Bovidae (Family)
 Meminna Gray, 1836 accepted as Moschiola Gray, 1852 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Tragulidae (Family)

Mena
     Mena Stephenson, 1920 · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Actiniaria (Order) > Halcampidae (Family)
 Mena Swainson, 1839 accepted as Spicara Rafinesque, 1810 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Centracanthidae (Family)

Menarus
     Menarus Andrewes, 1939 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Menarus Jedlicka, 1934 accepted as Menarus Andrewes, 1939 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Mendesia
     Mendesia Petri, 1962 † accepted as Mendesia Petri, 1962 † (unassessed) · Protozoa (Kingdom) > (Phylum) > (Class) > (Order) > Protozoa (awaiting allocation) (Family)
     Mendesia de Joannis, 1902 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Elachistidae (Family)

Mendesina
     Mendesina Lane, 1974 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Mendesina Amsel, 1935 accepted as Mendesia de Joannis, 1902 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Elachistidae (Family)

Mendesius
     Mendesius Piza, 1960 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)
 Mendesius Roewer, 1943 accepted as Gonyleptes Kirby, 1819 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Opiliones (Order) > Gonyleptidae (Family)

Mendocinia
     Mendocinia Jensen-Haarup, 1920 accepted as Mendocinia Jensen-Haarup, 1920 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Mendocinia Bordas, 1944 † accepted as Mendocinia Bordas, 1944 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)

Meneghinia
 Meneghinia Visiani, 1847 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Gesneriaceae (Family)
     Meneghinia Fucini, 1931 † accepted as Meneghinia Fucini, 1931 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Meneghinia Endlicher, 1839 accepted as Meneghinia Endlicher, 1839 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Boraginales (Order) > Boraginaceae (Family)
 Meneghinia O. Silvestri, 1889 accepted as Dendritina d'Orbigny, 1826 (Opinion of Loeblich & Tappan, 1987) · Chromista (Kingdom) > Retaria (Phylum) > Tubothalamea (Class) > Miliolida (Order) > Peneroplidae (Family)

Meneidophallus
 Meneidophallus Bordoni, 1972 † accepted as Xantholinus Dejean, 1821 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Meneidophallus Bordoni, 1971 accepted as Xantholinus Dejean, 1821 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Meneidophallus Bordoni, 1999 accepted as Xantholinus Dejean, 1821 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Menelikia
     Menelikia Arambourg, 1941 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Bovidae (Family)
 Menelikia Alberti, 1954 † accepted as Alteramenelikia Alberti, 1971 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Zygaenidae (Family)

Menemachus
     Menemachus Schönherr, 1843 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
     Menemachus Dejean, 1836 accepted as Apostasimerus Schönherr, 1844 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Menephilus
 Menephilus Carter, 1926 accepted as Hydissus Pascoe, 1869 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
     Menephilus Mulsant, 1854 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Meneristes
     Meneristes Pascoe, 1869 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Meneristes Carter accepted as Zophophilus Fairmaire, 1881 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Menestho
     Menestho Monterosato, 1878 accepted as Menestho Monterosato, 1878 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Menestho Möller, 1842 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Heterostropha (Order) > Pyramidellidae (Family)
     Menestho Conrad, 1860 accepted as Menestho Conrad, 1860 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Menesto
     Menesto Pergens, 1887 accepted as Menesto Pergens, 1887 · Animalia (Kingdom) > Bryozoa (Phylum) > Bryozoa (awaiting allocation) (Class) > Bryozoa (awaiting allocation) (Order) > Bryozoa (awaiting allocation) (Family)
 Menesto Crosse, 1864 accepted as Menestho Möller, 1842 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Heterostropha (Order) > Pyramidellidae (Family)

Menetho
     Menetho Rafinesque, 1837 accepted as Menetho Rafinesque, 1837 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Frankeniaceae (Family)
 Menetho Gray, 1847 accepted as Menestho Möller, 1842 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Heterostropha (Order) > Pyramidellidae (Family)

Menetus
     Menetus H. Adams & A. Adams, 1855 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Hygrophila (Order) > Planorbidae (Family)
     Menetus Fischer, 1883 accepted as Menetus Fischer, 1883 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Menetus Aldrich, 1926 accepted as Aldrichomyia Özdikmen, 2006 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)

Menevia
     Menevia Schaus in Seitz, 1928 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Mimallonidae (Family)
     Menevia Lake, 1938 † accepted as Menevia Lake, 1938 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Ptychopariida (Order) > Conocoryphidae (Family)

Menexenus
     Menexenus Stål, 1875 accepted as Menexenus Stål, 1875 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Phasmatodea (Order) > Lonchodidae (Family)
     Menexenus Artigas, 1970 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Asilidae (Family)

Mengea
     Mengea Grote, 1886 † · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Strepsiptera (Order) > Mengeidae (Family)
 Mengea H. Conwentz, 1886 † accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Rosales (Order) > Rosaceae (Family)
 Mengea Cambridge, 1903 accepted as Allomengea Strand, 1912 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Linyphiidae (Family)
 Mengea J.C. Schauer, 1843 accepted as Amaranthus Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Amaranthaceae (Family)

Menida
     Menida Motschoulsky, 1862 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Pentatomidae (Family)
 Menida accepted as Menidia Bonaparte, 1836 (misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Atheriniformes (Order) > Atherinopsidae (Family)

Menidia
     Menidia Bonaparte, 1836 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Atheriniformes (Order) > Atherinopsidae (Family)
 Menidia Browne, 1789 accepted as (Not available; published in a rejected work on Official Index (Opinion 89)) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Clupeiformes (Order) > Engraulidae (Family)

Menippe
 Menippe Jeffreys, 1867 accepted as Aclis Lovén, 1846 (invalid: junior homonym of Menippe de Haan, 1833; Pherusa Jeffreys, 1869, is a replacement name) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Ptenoglossa (Order) > Aclididae (Family)
     Menippe De Haan in Siebold, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Menippidae (Family)

Meniscus
     Meniscus Irgens, 1977 (Approved Lists, 1980) · Bacteria (Kingdom) > Bacteroidetes (Phylum) > Cytophagia (Class) > Cytophagales (Order) > Cytophagaceae (Family)
     Meniscus Schiödte, 1839 accepted as Meniscus Schiödte, 1839 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Menius
     Menius du Buysson, 1898 accepted as Menius du Buysson, 1898 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Menius Chapuis in Lacordaire, 1874 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Mennerella
 Mennerella Schmidt, 1971 † accepted as Remondella Durham, 1955 † (subjective junior synonym) · Animalia (Kingdom) > Echinodermata (Phylum) > Echinoidea (Class) > Clypeasteroida (Order) > Scutellidae (Family)
     Mennerella Egorov, 1950 † · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Podocopida (Order) > Cavellinidae (Family)

Menneria
     Menneria A.S. Lopuchin, 1971 † · Protozoa (Kingdom) > Acritarcha (Phylum) > Acritarcha (awaiting allocation) (Class) > Acritarcha (awaiting allocation) (Order) > Acritarcha (awaiting allocation) (Family)
     Menneria Schischkinskaja, 1964 † · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Ostracoda (awaiting allocation) (Order) > Ostracoda (awaiting allocation) (Family)

Menoceras
     Menoceras Troxell, 1921 accepted as Menoceras Troxell, 1921 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Perissodactyla (Order) > Rhinocerotidae (Family)
     Menoceras (R. Brown) J. Lindley, 1846 accepted as Menoceras (R. Brown) J. Lindley, 1846 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Goodeniaceae (Family)

Menodon
     Menodon von Meyer, 1835 accepted as Menodon von Meyer, 1835 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
 Menodon Osborn, 1891 accepted as Menopon Nitzsch, 1818 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Phthiraptera (Order) > Menoponidae (Family)

Menodora
     Menodora Horváth, 1912 accepted as Menodora Horváth, 1912 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Menodora Bonpland in Humboldt & Bonpland, 1812 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Oleaceae (Family)

Menoethius
     Menoethius White, 1848 accepted as Menoethius White, 1848 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Crustacea (awaiting allocation) (Class) > Crustacea (awaiting allocation) (Order) > Crustacea (awaiting allocation) (Family)
 Menoethius Haan in Siebold, 1839 accepted as Menaethius H. Milne Edwards, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Majidae (Family)

Menorosia
     Menorosia Collado & Alonso-Zarazaga, 1996 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Aderidae (Family)
     Menorosia Báguena Corella, 1948 accepted as Menorosia Collado & Alonso-Zarazaga, 1996 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Aderidae (Family)

Menoscelis
     Menoscelis Dejean, 1835 accepted as Menoscelis Dejean, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coccinellidae (Family)
 Menoscelis Mulsant, 1850 accepted as Thalassa Mulsant, 1850 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coccinellidae (Family)

Mentophilus
     Mentophilus Blanchard in Brullé, 1840 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
     Mentophilus Laporte de Castelnau, 1840 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Mentula
     Mentula Plancus, 1760 accepted as Mentula Plancus, 1760 (unassessed) · Animalia (Kingdom) > Echinodermata (Phylum) > Echinodermata (awaiting allocation) (Class) > Echinodermata (awaiting allocation) (Order) > Echinodermata (awaiting allocation) (Family)
     Mentula Paetel, 1875 accepted as Mentula Paetel, 1875 · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Mentzelia
     Mentzelia Quenstedt, 1869 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Spiriferida (Order) > Spiriferinidae (Family)
     Mentzelia Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Cornales (Order) > Loasaceae (Family)

Menyanthes
     Menyanthes Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Menyanthaceae (Family)
     Menyanthes Schwarz, 1791 accepted as Menyanthes Schwarz, 1791 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Menyllus
     Menyllus Pascoe, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Menyllus Gray, 1867 accepted as Iophon Gray, 1867 (junior synonym) · Animalia (Kingdom) > Porifera (Phylum) > Demospongea (Class) > Poecilosclerida (Order) > Acarnidae (Family)

Menzbieria
     Menzbieria Bogoyavlensky, 1922 · Chromista (Kingdom) > Miozoa (Phylum) > Gregarinomorphea (Class) > Arthrogregarida (Order) > Lipotrophidae (Family)
 Menzbieria Plous, 1975 accepted as Menzbieria Bogoyavlensky, 1922 · Chromista (Kingdom) > Miozoa (Phylum) > Gregarinomorphea (Class) > Arthrogregarida (Order) > Lipotrophidae (Family)

Menziesia
     Menziesia J.E. Smith, 1791 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Ericaceae (Family)
     Menziesia Gibson, 1976 † · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Capsalidea (Order) > Capsalidae (Family)

Mephites
 Mephites Swainson, 1835 accepted as Mephitis Geoffroy & Cuvier, 1795 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Mephitidae (Family)
 Mephites Gray, 1847 accepted as Mephitis Geoffroy & Cuvier, 1795 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Mephitidae (Family)

Mephitis
     Mephitis Geoffroy & Cuvier, 1795 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Mephitidae (Family)
 Mephitis Desmarest, 1820 accepted as Mydaus Cuvier in Geoffroy & Cuvier, 1821 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Mephitidae (Family)

Meracantha
     Meracantha Kirby in Richardson, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Meracantha Macquart, 1851 accepted as Meracanthomyia Hendel, 1910 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tephritidae (Family)

Meratia
 Meratia Alph. de Candolle, 1846 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Boraginales (Order) > Boraginaceae (Family)
 Meratia Cassini in F. Cuvier, 1824 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Meratia Loiseleur-Deslongchamps, 1818 accepted as Chimonanthus J. Lindley, 1819 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Laurales (Order) > Calycanthaceae (Family)

Mercetia
 Mercetia Bakkendorf, 1965 accepted as Psyllaephagus Ashmead, 1900 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Encyrtidae (Family)
     Mercetia Kieffer in André, 1906 accepted as Mercetia Kieffer in André, 1906 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Meredithia
     Meredithia J.Agardh, 1892 · Plantae (Kingdom) > Rhodophyta (Phylum) > Rhodophyta incertae sedis (Class) > Cryptonemiales (Order) > Kallymeniaceae (Family)
 Meredithia Hernández-Alcántara & Solís-Weiss, 2000 accepted as Magelona F. Müller, 1858 (subjective synonym) · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Magelonida (Order) > Magelonidae (Family)

Mergulus
     Mergulus Vieillot, 1816 accepted as Mergulus Vieillot, 1816 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Mergulus Linnaeus, 1766 accepted as Mergulus Linnaeus, 1766 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Mergus
     Mergus Brisson, 1760 accepted as Mergus Brisson, 1760 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Podicipediformes (Order) > Podicipedidae (Family)
     Mergus Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Anseriformes (Order) > Anatidae (Family)

Meria
     Meria Illiger, 1807 accepted as Meria Illiger, 1807 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Tiphiidae (Family)
 Meria accepted as Vanikoro Quoy & Gaimard, 1832 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Vanikoridae (Family)
     Meria Vuillemin, 1896 · Fungi (Kingdom) > Ascomycota (Phylum) > Leotiomycetes (Class) > Helotiales (Order) > Hemiphacidiaceae (Family)
 Meria Griffith & Pidgeon, 1833 accepted as Maja Lamarck, 1801 (incorrect spelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Majidae (Family)

Meriana
 Meriana Rafinesque, 1815 accepted as Meria Illiger, 1807 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Tiphiidae (Family)
 Meriana Macquart, 1835 accepted as Meriania Robineau-Desvoidy, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
 Meriana É.P. Ventenat, 1829 accepted as Meriania O. Swartz, 1797 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Melastomataceae (Family)
 Meriana Vellozo, 1829 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Solanales (Order) > Convolvulaceae (Family)
 Meriana C.J. Trew, 1754 accepted as Meriana C.J. Trew, 1754 (nomen rejiciendum) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Iridaceae (Family)

Meriania
     Meriania Robineau-Desvoidy, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
     Meriania O. Swartz, 1797 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Melastomataceae (Family)

Meridiana
 Meridiana Linnaeus f., 1781 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Portulacaceae (Family)
 Meridiana J. Hill, 1761 accepted as Gazania J. Gaertner, 1791 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Meridion
     Meridion C.Agardh, 1824 · Chromista (Kingdom) > Ochrophyta (Phylum) > Bacillariophyceae (Class) > Fragilariales (Order) > Fragilariaceae (Family)
 Meridion Des Gozis, 1886 accepted as Callidium Mulsant, 1839 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Merimna
     Merimna Saunders, 1868 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)
     Merimna Thomson, 1878 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)

Meriola
     Meriola Banks, 1895 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Corinnidae (Family)
 Meriola Davie, 1993 accepted as Lipkemera Davie, 2010 (preoccupied) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Xanthidae (Family)

Merion
     Merion Mulsant & Verreaux, 1875 accepted as Merion Mulsant & Verreaux, 1875 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Apodiformes (Order) > Trochilidae (Family)
     Merion Schinz in Cuvier, 1825 accepted as Merion Schinz in Cuvier, 1825 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Passeres (awaiting allocation) (Family)

Meriones
     Meriones Illiger, 1811 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Rodentia (Order) > Muridae (Family)
 Meriones Cuvier, 1823 † accepted as Zapus Coues, 1875 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Rodentia (Order) > Dipodidae (Family)

Merionoeda
     Merionoeda Pascoe, 1858 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Merionoeda sensu Bates, 1885 accepted as Merionoeda Pascoe, 1858 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Merionus
     Merionus Stephens, 1829 accepted as Merionus Stephens, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
     Merionus Stephens, 1831 accepted as Merionus Stephens, 1831 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
     Merionus Dejean, 1821 accepted as Barynotus Germar, 1817 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Merisma
     Merisma McDunnough, 1920 accepted as Merisma McDunnough, 1920 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
 Merisma Broun, 1909 accepted as Toura Broun, 1909 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Merisma (E.M. Fries) Gillet, 1878 accepted as Grifola S.F. Gray, 1821 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Polyporales (Order) > Meripilaceae (Family)
 Merisma Persoon, 1797 accepted as Thelephora Ehrhart ex Willdenow, 1787 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Thelephorales (Order) > Thelephoraceae (Family)

Merista
     Merista Suess, 1851 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Spiriferida (Order) > Meristellidae (Family)
 Merista Chapuis in Lacordaire, 1875 accepted as Meristata Strand, 1935 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Meristocotyle
 Meristocotyle Rossbach, 1906 accepted as Merizocotyle Cerfontaine, 1894 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Monocotylidea (Order) > Monocotylidae (Family)
     Meristocotyle Fischthal & Kuntz, 1964 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Opisthorchiida (Order) > Meristocotylidae (Family)

Meristodon
     Meristodon Sauvage, 1883 † accepted as Meristodon Sauvage, 1883 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
     Meristodon Agassiz, 1843 † accepted as Meristodon Agassiz, 1843 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)

Merium
     Merium Kirby in Richardson, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Merium LeConte, 1873 accepted as Meriellum Linsley, 1957 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Merizomyria
     Merizomyria Kützing, 1843 accepted as Merizomyria Kützing, 1843 · Bacteria (Kingdom) > Cyanobacteria (Phylum) > Cyanophyceae (Class) > Cyanophyceae (awaiting allocation) (Order) > Cyanophyceae incertae sedis (Family)
     Merizomyria Pollini, 1817 accepted as Merizomyria Pollini, 1817 · Bacteria (Kingdom) > Cyanobacteria (Phylum) > Cyanophyceae (Class) > Cyanophyceae (awaiting allocation) (Order) > Cyanophyceae (awaiting allocation) (Family)

Merklia
     Merklia Chen, 1997 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
     Merklia Ito, 2004 accepted as Merklia Ito, 2004 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Merlangius
     Merlangius Geoffroy, 1767 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Gadiformes (Order) > Gadidae (Family)
     Merlangius Garsault, 1764 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Gadiformes (Order) > Gadidae (Family)

Merlangus
 Merlangus Rafinesque, 1810 accepted as Merluccius Rafinesque, 1810 (synonym) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Gadiformes (Order) > Merlucciidae (Family)
 Merlangus Oken (ex Cuvier), 1817 accepted as Merlangius Garsault, 1764 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Gadiformes (Order) > Gadidae (Family)

Merlucius
 Merlucius Schinz in Cuvier, 1822 accepted as Merluccius Rafinesque, 1810 (misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Gadiformes (Order) > Merlucciidae (Family)
 Merlucius Gronow in Gray, 1854 accepted as Merluccius Rafinesque, 1810 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Gadiformes (Order) > Merlucciidae (Family)

Merlus
     Merlus de la Fresnaye, 1838 accepted as Merlus de la Fresnaye, 1838 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Merlus Guichenot, 1848 accepted as Merluccius Rafinesque, 1810 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Gadiformes (Order) > Merlucciidae (Family)

Merocoris
     Merocoris Perty, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Coreidae (Family)
     Merocoris Burmeister, 1834 accepted as Merocoris Burmeister, 1834 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Pentatomidae (Family)
     Merocoris Hahn, 1834 accepted as Merocoris Hahn, 1834 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Merodontus
     Merodontus Jekel, 1854 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Merodontus MacLeay, 1871 accepted as Amphistomus van Lansberge, 1874 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Meroe
     Meroe Stephens, 1833 accepted as Brachycentrus Curtis, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Trichoptera (Order) > Brachycentridae (Family)
 Meroe Stephens, 1836 accepted as Brachycentrus Curtis, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Trichoptera (Order) > Brachycentridae (Family)
 Meroe Schumacher, 1817 accepted as Sunetta Link, 1807 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Veneridae (Family)

Merogymnus
     Merogymnus Hobby, 1933 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Asilidae (Family)
 Merogymnus Ogilby, 1908 accepted as Opistognathus Cuvier, 1816 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Opistognathidae (Family)

Meromyza
     Meromyza Meigen, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Chloropidae (Family)
     Meromyza Stephens, 1829 accepted as Meromyza Meigen, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Chloropidae (Family)

Merona
     Merona Norman, 1865 · Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Anthoathecata (Order) > Oceaniidae (Family)
 Merona Sharp, 1883 accepted as Meronera Sharp, 1887 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Merone
 Merone Storer, 1846 accepted as Morone Mitchill, 1814 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Moronidae (Family)
 Merone Allman, 1872 accepted as Merona Norman, 1865 · Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Anthoathecata (Order) > Oceaniidae (Family)

Meropachys
     Meropachys Popov, 1986 † accepted as Meropachys Popov, 1986 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Meropachys Burmeister, 1835 accepted as Meropachys Burmeister, 1835 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Meropachys Hope, 1841 accepted as Tessaromma Newman, 1840 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Merope
     Merope Newman, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Mecoptera (Order) > Meropeidae (Family)
     Merope M.J. Roemer, 1846 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Sapindales (Order) > Rutaceae (Family)
 Merope Weddell, 1856 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
     Merope Martens, 1860 accepted as Merope Martens, 1860 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Helicidae (Family)
 Merope H. Adams & A. Adams, 1856 accepted as Meropesta Iredale, 1929 (invalid: junior homonym of Merope Newman, 1838) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Mactridae (Family)
 Merope Thomson, 1882 accepted as Laophontodes Scott T., 1894 (synonym) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Harpacticoida (Order) > Ancorabolidae (Family)

Merophorus
     Merophorus Faust, 1889 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Merophorus Garman, 1899 accepted as Paraliparis Collett, 1879 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Scorpaeniformes (Order) > Liparidae (Family)

Merostachys
     Merostachys K.P.J. Sprengel, 1824 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Poaceae (Family)
 Merostachys Nakai, 1935 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Saxifragales (Order) > Crassulaceae (Family)

Merostenus
     Merostenus Walker, 1837 accepted as Merostenus Walker, 1837 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Merostenus White, 1855 accepted as Caribbomerus Vitali in Vitali & Rezbanyai-Reser, 2003 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Merou
     Merou Gray, 1842 accepted as Merou Gray, 1842 · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
     Merou Bonaparte, 1831 accepted as Epinephelus Bloch, 1793 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Serranidae (Family)

Merremia
     Merremia Dennstedt ex Endlicher, 1841 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Solanales (Order) > Convolvulaceae (Family)
     Merremia Berg, 1901 accepted as Merremia Berg, 1901 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Elapidae (Family)

Merriamella
     Merriamella Titova, 1994 † accepted as Merriamella Titova, 1994 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Mesogastropoda (Order) > Mesogastropoda (awaiting allocation) (Family)
     Merriamella Jordan, 1907 † accepted as Merriamella Jordan, 1907 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
 Merriamella Blodgett & Johnson, 1992 † accepted as Merriamites Blodgett & Johnson, 1995 † · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca incertae sedis (Class) > Gastropoda/Monoplacophora incertae sedis (Order) > Pterothecidae (Family)

Merrifieldia
     Merrifieldia Tutt, 1905 accepted as Merrifieldia Tutt, 1905 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Pterophoridae (Family)
 Merrifieldia J.Agardh, 1885 accepted as Hypnea J.V.F. Lamouroux, 1813 (synonym) · Plantae (Kingdom) > Rhodophyta (Phylum) > Florideophyceae (Class) > Gigartinales (Order) > Hypneaceae (Family)

Mertensia
     Mertensia A.W. Roth, 1797 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Boraginales (Order) > Boraginaceae (Family)
 Mertensia Kunth in Humboldt, Bonpland & Kunth, 1817 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Rosales (Order) > Ulmaceae (Family)
 Mertensia Willdenow, 1804 accepted as Dicranopteris Bernhardi, 1805 · Plantae (Kingdom) > Tracheophyta (Phylum) > Polypodiopsida (Class) > Gleicheniales (Order) > Gleicheniaceae (Family)
 Mertensia Thunberg ex Roth, 1806 accepted as Champia Desvaux, 1809 (synonym) · Plantae (Kingdom) > Rhodophyta (Phylum) > Florideophyceae (Class) > Rhodymeniales (Order) > Champiaceae (Family)
     Mertensia Lesson, 1830 · Animalia (Kingdom) > Ctenophora (Phylum) > Tentaculata (Class) > Cydippida (Order) > Mertensiidae (Family)

Meruana
     Meruana Sjöstedt, 1909 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
     Meruana Delucchi, 1962 accepted as Meruana Delucchi, 1962 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Merula
 Merula Möhring, 1758 accepted as Merula Möhring, 1758 (Published in a rejected work (ICZN)) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Cuculiformes (Order) > Cuculidae (Family)
     Merula Boie, 1826 accepted as Merula Boie, 1826 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Turdidae (Family)
 Merula Koch, 1816 accepted as Turdus Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Muscicapidae (Family)

Merulius
 Merulius Haller ex G.R. Boehmer, 1760 accepted as Cantharellus Adanson ex E.M. Fries, 1821 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Cantharellales (Order) > Cantharellaceae (Family)
 Merulius E.M. Fries, 1821 accepted as Phlebia E.M. Fries, 1821 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Polyporales (Order) > Meruliaceae (Family)

Merus
     Merus Gistl, 1857 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Merus Poey, 1871 accepted as Epinephelus Bloch, 1793 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Serranidae (Family)

Mesacanthus
     Mesacanthus Traquair, 1888 † accepted as Mesacanthus Traquair, 1888 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Acanthodii (Class) > Acanthodiformes (Order) > Acanthodidae (Family)
 Mesacanthus Desbrochers, 1875 accepted as Polydrusus Germar, 1817 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Mesacmaea
     Mesacmaea Andres, 1883 · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Actiniaria (Order) > Haloclavidae (Family)
     Mesacmaea Ehrenberg, 1834 accepted as Mesacmaea Ehrenberg, 1834 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)

Mesagyrtes
 Mesagyrtes Ponomarenko in Arnol'di, Zherikhin, Nikritin & Ponomarenko, 1977 † accepted as Mesecanus Newton, 1982 † · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Agyrtidae (Family)
 Mesagyrtes Broun, 1895 accepted as Colon Herbst in Jablonsky, 1797 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Leiodidae (Family)

Mesalia
     Mesalia Gray, 1847 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sorbeoconcha (Order) > Turritellidae (Family)
 Mesalia Mulsant & Rey, 1867 accepted as Globicornis Latreille in Cuvier, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dermestidae (Family)

Mesaspis
     Mesaspis Bourguignat, 1876 accepted as Mesaspis Bourguignat, 1876 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Mesaspis Cope, 1877 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Anguidae (Family)

Mesembriotherium
     Mesembriotherium Ameghino, 1889 † accepted as Mesembriotherium Ameghino, 1889 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)
     Mesembriotherium Moreno, 1882 accepted as Mesembriotherium Moreno, 1882 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)

Meseres
     Meseres Ludwig, 1893 accepted as Meseres Ludwig, 1893 · Animalia (Kingdom) > Echinodermata (Phylum) > Holothuroidea (Class) > Synallactida (Order) > Synallactidae (Family)
     Meseres Schewiakoff, 1892 · Chromista (Kingdom) > Ciliophora (Phylum) > Spirotrichea (Class) > Halteriida (Order) > Meseridae (Family)

Mesetaia
     Mesetaia Hupé, 1953 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Ptychopariida (Order) > Ptychopariida (awaiting allocation) (Family)
     Mesetaia Hupé in Piveteau, 1953 † accepted as Mesetaia Hupé, 1953 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Ptychopariida (Order) > Ptychopariida (awaiting allocation) (Family)

Mesites
     Mesites Hoffmann, 1866 † accepted as Mesites Hoffmann, 1866 † (unassessed) · Animalia (Kingdom) > Echinodermata (Phylum) > Cystoidea (Class) > Cystoidea (awaiting allocation) (Order) > Cystoidea (awaiting allocation) (Family)
     Mesites Schönherr, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
     Mesites Geoffroy, 1838 accepted as Mesites Geoffroy, 1838 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Gruiformes (Order) > Mesitornithidae (Family)
 Mesites Jenyns, 1842 accepted as Galaxias Cuvier, 1816 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Osmeriformes (Order) > Galaxiidae (Family)
 Mesites Ludwig, 1893 accepted as Mesothuria Ludwig, 1894 · Animalia (Kingdom) > Echinodermata (Phylum) > Holothuroidea (Class) > Synallactida (Order) > Synallactidae (Family)

Mesitinus
     Mesitinus Fairmaire, 1903 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Mesitinus Voss, 1925 accepted as Omolabus Jekel, 1860 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Attelabidae (Family)

Mesobius
     Mesobius Chamberlin, 1951 accepted as Mesobius Chamberlin, 1951 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Chilopoda (Class) > Lithobiida (Order) > Lithobiidae (Family)
     Mesobius Hubbs & Iwamoto, 1977 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Gadiformes (Order) > Macrouridae (Family)

Mesobothrus
     Mesobothrus Verhoeff, 1937 accepted as Mesobothrus Verhoeff, 1937 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Myriapoda (awaiting allocation) (Class) > Myriapoda (awaiting allocation) (Order) > Myriapoda (awaiting allocation) (Family)
     Mesobothrus Folkmanová, 1940 accepted as Mesobothrus Folkmanová, 1940 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Myriapoda (awaiting allocation) (Class) > Myriapoda (awaiting allocation) (Order) > Myriapoda (awaiting allocation) (Family)

Mesocaris
     Mesocaris Ortmann, 1893 accepted as Mesocaris Ortmann, 1893 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Palaemonidae (Family)
 Mesocaris Edmondson, 1935 accepted as Antecaridina Edmondson, 1954 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Atyidae (Family)

Mesocentrus
     Mesocentrus Szépligeti, 1900 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Braconidae (Family)
     Mesocentrus Funkhouser, 1921 accepted as Mesocentrus Funkhouser, 1921 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Membracidae (Family)

Mesocera
     Mesocera Macquart, 1839 accepted as Mesocera Macquart, 1839 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Acroceridae (Family)
 Mesocera Sørensen in Koch (Keyserling), 1886 accepted as Ibalonius Karsch, 1880 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Opiliones (Order) > Podoctidae (Family)

Mesocerambyx
     Mesocerambyx Zagajkevich, 1991 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Mesocerambyx Hitzinger, 1943 accepted as Mesocerambyx Hitzinger, 1943 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)

Mesoceras
     Mesoceras Barrande, 1877 † · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Discosorida (Order) > Mesoceratidae (Family)
 Mesoceras Sørensen in Koch (Keyserling), 1886 accepted as Ibalonius Karsch, 1880 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Opiliones (Order) > Podoctidae (Family)
 Mesoceras Cook, 1930 † accepted as Teleoceras Hatcher, 1894 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Perissodactyla (Order) > Rhinocerotidae (Family)

Mesocetus
     Mesocetus Van Beneden, 1880 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Cetacea (Order) > Cetacea (awaiting allocation) (Family)
 Mesocetus Fraas, 1904 † accepted as Eocetus Fraas, 1904 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Cetacea (Order) > Protocetidae (Family)
 Mesocetus Moreno, 1892 † accepted as Diaphorocetus Ameghino, 1894 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Cetacea (Order) > Physeteridae (Family)

Mesochaeta
     Mesochaeta Brauer & Bergenstamm, 1891 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
     Mesochaeta Stein, 1911 accepted as Mesochaeta Stein, 1911 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)

Mesochara
     Mesochara L. Grambast, 1963 † · Plantae (Kingdom) > Charophyta (Phylum) > Charophyceae (Class) > Charales (Order) > Characeae (Family)
 Mesochara Cameron, 1939 accepted as Aleochara Gravenhorst, 1802 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Mesochara Blackwelder, 1952 accepted as Aleochara Gravenhorst, 1802 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Mesochloa
     Mesochloa Scudder, 1898 accepted as Mesochloa Scudder, 1898 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Orthoptera (awaiting allocation) (Family)
     Mesochloa Rafinesque, 1838 accepted as Mesochloa Rafinesque, 1838 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Amaryllidaceae (Family)

Mesochoerus
     Mesochoerus Shaw & Cooke, 1941 † accepted as Mesochoerus Shaw & Cooke, 1941 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Suidae (Family)
 Mesochoerus Trouessart, 1898 accepted as Mesochoerus Trouessart, 1898 (Misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)

Mesochrysa
     Mesochrysa Navás, 1927 accepted as Mesochrysa Navás, 1927 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Neuroptera (Order) > Neuroptera (awaiting allocation) (Family)
     Mesochrysa Navás, 1936 accepted as Mesochrysa Navás, 1936 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Neuroptera (Order) > Neuroptera (awaiting allocation) (Family)

Mesocladiscites
     Mesocladiscites Shevyrev, 1968 † · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Ceratitida (Order) > Ceratitida (awaiting allocation) (Family)
     Mesocladiscites Farsan, 1972 † accepted as Mesocladiscites Farsan, 1972 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Cephalopoda (awaiting allocation) (Order) > Cephalopoda (awaiting allocation) (Family)

Mesoclastus
     Mesoclastus Wagler, 1832 accepted as Mesoclastus Wagler, 1832 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Mesoclastus Gistl, 1836 accepted as Hypocephalus Desmarest, 1832 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Mesocnus
     Mesocnus Matthew, 1931 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Pilosa (Order) > Megalonychidae (Family)
     Mesocnus La Torre & Matthew, 1915 † accepted as Mesocnus Matthew, 1931 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Pilosa (Order) > Megalonychidae (Family)
 Mesocnus Matthew, 1918 † accepted as Mesocnus Matthew, 1931 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Pilosa (Order) > Megalonychidae (Family)

Mesocordulia
     Mesocordulia May, 1992 accepted as Mesocordulia May, 1992 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Insecta (awaiting allocation) (Order) > Insecta (awaiting allocation) (Family)
     Mesocordulia Ren & Guo, 1996 † accepted as Mesocordulia Ren & Guo, 1996 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Odonata (awaiting allocation) (Family)

Mesocorixa
     Mesocorixa Handlirsch, 1906 † accepted as Mesocorixa Handlirsch, 1906 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Mesocorixa Hong & Wang, 1990 † accepted as Mesocorixa Hong & Wang, 1990 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Mesocrangon
     Mesocrangon Woodward, 1873 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Crangonidae (Family)
     Mesocrangon Zarenkov, 1965 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Crangonidae (Family)
 Mesocrangon Zarenkov, 1964 accepted as Mesocrangon Zarenkov, 1965 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Crangonidae (Family)

Mesocryptus
     Mesocryptus Szépligeti, 1916 accepted as Mesocryptus Szépligeti, 1916 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Mesocryptus Thomson, 1873 accepted as Mesocryptus Thomson, 1873 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Mesoctenus
 Mesoctenus Thomas, 1918 accepted as Petrodromus Peters, 1846 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Insectivora (Order) > Macroscelididae (Family)
 Mesoctenus Mello-Leitão, 1930 accepted as Nothroctenus Badcock, 1932 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Ctenidae (Family)

Mesocyclus
     Mesocyclus Dupouy, 1966 † accepted as Mesocyclus Dupouy, 1966 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Gastropoda (awaiting allocation) (Order) > Gastropoda (awaiting allocation) (Family)
     Mesocyclus Pollonera, 1906 accepted as Mesocyclus Pollonera, 1906 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Mesocyprinus
 Mesocyprinus Fang, 1936 accepted as Cyprinus Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Cypriniformes (Order) > Cyprinidae (Family)
 Mesocyprinus Cheng, 1950 accepted as Cyprinus Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Cypriniformes (Order) > Cyprinidae (Family)

Mesocythere
     Mesocythere Kiss, 1959 accepted as Mesocythere Kiss, 1959 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Podocopida (Order) > Cytherideidae (Family)
     Mesocythere Hartmann, 1956 · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Podocopida (Order) > Leptocytheridae (Family)

Mesoda
     Mesoda Marcus, 1949 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Turbellaria (Class) > Proseriata (Order) > Monocelididae (Family)
 Mesoda Faubel, 1983 accepted as Mesocela Jacubowa, 1906 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Turbellaria (Class) > Polycladida (Order) > Latocestidae (Family)

Mesodema
     Mesodema Whitehouse, 1939 † accepted as Mesodema Whitehouse, 1939 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)
 Mesodema Caldwell, 1945 accepted as Misodema Melichar, 1907 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Issidae (Family)

Mesodendrium
     Mesodendrium Waggoner & Langer, 1993 † accepted as Mesodendrium Waggoner & Langer, 1993 † (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Hydrozoa (awaiting allocation) (Order) > Hydrozoa (awaiting allocation) (Family)
     Mesodendrium Faust, 1919 accepted as Mesodendrium Faust, 1919 (unassessed) · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Trematoda (awaiting allocation) (Order) > Trematoda (awaiting allocation) (Family)

Mesodiplogaster
 Mesodiplogaster Goodey, 1963 accepted as Pristionchus Kreis, 1932 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Diplogasterida (Order) > Diplogasteridae (Family)
     Mesodiplogaster Körner, 1954 accepted as Pristionchus Kreis, 1932 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Diplogasterida (Order) > Diplogasteridae (Family)

Mesodiscus
     Mesodiscus Rafinesque, 1838 accepted as Mesodiscus Rafinesque, 1838 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Apiales (Order) > Apiaceae (Family)
 Mesodiscus Minot, 1877 accepted as Prosthiostomum Quatrefages, 1845 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Turbellaria (Class) > Polycladida (Order) > Prosthiostomidae (Family)
 Mesodiscus Piller, 1978 † accepted as Triadodiscus Piller, 1983 † (Opinion of Loeblich & Tappan, 1987) · Chromista (Kingdom) > Retaria (Phylum) > Tubothalamea (Class) > Involutinida (Order) > Involutinidae (Family)

Mesodon
     Mesodon Rafinesque, 1831 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Polygyridae (Family)
     Mesodon Wagner, 1851 † accepted as Mesodon Wagner, 1851 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Pycnodontiformes (Order) > Pycnodontidae (Family)
 Mesodon Ameghino, 1882 † accepted as Glossotherium Owen, 1839 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Pilosa (Order) > Mylodontidae (Family)
 Mesodon Trouessart, 1898 accepted as Mesoplodon Gervais, 1850 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Cetacea (Order) > Ziphiidae (Family)

Mesodonta
     Mesodonta Matsumura, 1920 accepted as Mesodonta Matsumura, 1920 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Mesodonta Baly, 1865 accepted as Clitena Baly, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Mesogenea
     Mesogenea Gray, 1863 accepted as Mesogenea Gray, 1863 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Mesogenea Hampson, 1902 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Mesogomphus
     Mesogomphus Davis, 1883 † accepted as Mesogomphus Davis, 1883 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
     Mesogomphus Handlirsch, 1906 † accepted as Mesogomphus Handlirsch, 1906 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Gomphidae (Family)
     Mesogomphus Morris & Roberts, 1862 † accepted as Mesogomphus Morris & Roberts, 1862 † · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
 Mesogomphus Förster, 1906 accepted as Paragomphus Cowley, 1934 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Gomphidae (Family)

Mesogramma
     Mesogramma A.P. de Candolle, 1838 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Mesogramma Loew, 1865 accepted as Mesograpta Loew, 1872 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)
 Mesogramma Stephens, 1850 accepted as Mesotype Hübner, 1825 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
 Mesogramma Hong, 1984 † accepted as Hebeigramma Hong, 2003 † · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Caloneurodea (Order) > Hebeigrammidae (Family)

Mesohemerobius
     Mesohemerobius Ping, 1928 † accepted as Mesohemerobius Ping, 1928 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Neuroptera (Order) > Neuroptera (awaiting allocation) (Family)
     Mesohemerobius Nakahara, 1966 accepted as Mesohemerobius Nakahara, 1966 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Neuroptera (Order) > Hemerobiidae (Family)

Mesojassus
     Mesojassus Handlirsch, 1939 † accepted as Mesojassus Handlirsch, 1939 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Membracidae (Family)
     Mesojassus Tillyard, 1916 † accepted as Mesojassus Tillyard, 1916 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Mesolaelaps
     Mesolaelaps Hirst, 1926 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Laelapidae (Family)
 Mesolaelaps Schulz, 1906 accepted as Mesolaelaps Schulz, 1906 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Pteromalidae (Family)

Mesoleuca
     Mesoleuca Hübner, 1825 accepted as Mesoleuca Hübner, 1825 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Mesoleuca Packard, 1903 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Mesolophus
     Mesolophus Büttikofer, 1896 accepted as Mesolophus Büttikofer, 1896 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Mesolophus Gahan, 1894 accepted as Agelasta Newman, 1842 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Mesolyda
     Mesolyda Rasnitsyn, 1963 † accepted as Mesolyda Rasnitsyn, 1963 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Mesolyda Hong, 1983 † accepted as Mesolyda Hong, 1983 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Mesolytta
     Mesolytta Selander, 1960 accepted as Mesolytta Selander, 1960 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Mesolytta Kaszab, 1962 accepted as Lytta Fabricius, 1775 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Meloidae (Family)

Mesomelaena
     Mesomelaena C.G.D. Nees in J.G.C. Lehmann, 1846 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Cyperaceae (Family)
 Mesomelaena Rondani, 1865 accepted as Mesomelena Rondani, 1859 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Sarcophagidae (Family)

Mesomomus
     Mesomomus Pascoe, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Mesomomus Aurivillius, 1921 accepted as Nesomomus Pascoe, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Mesomorpha
     Mesomorpha Pratz, 1882 † · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Scleractinia (Order) > Thamnasteriidae (Family)
 Mesomorpha Hodgson, 1841 accepted as Mesomorpha Hodgson, 1841 (Unjustified (?) emendation) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Mesomorphus
     Mesomorphus Miedel, 1880 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
     Mesomorphus von Seidlitz, 1893 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Mesomphix
     Mesomphix Rafinesque, 1819 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Zonitidae (Family)
     Mesomphix Rafinesque, 1818 accepted as Mesomphix Rafinesque, 1819 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Zonitidae (Family)

Mesomyia
     Mesomyia Macquart, 1850 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tabanidae (Family)
     Mesomyia Pongrácz, 1928 † accepted as Mesomyia Pongrácz, 1928 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Bibionidae (Family)

Mesomys
     Mesomys Wagner, 1845 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Rodentia (Order) > Echimyidae (Family)
 Mesomys Sars, 1893 accepted as Mesomysis Czerniavsky, 1882 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Mysida (Order) > Mysidae (Family)

Mesomysis
 Mesomysis Czerniavsky, 1882 accepted as Mysis Latreille, 1802 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Mysida (Order) > Mysidae (Family)
 Mesomysis Norman, 1905 accepted as Michtheimysis Norman, 1902 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Mysida (Order) > Mysidae (Family)

Mesonema
     Mesonema Pierantoni, 1916 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Drilonematida (Order) > Drilonematidae (Family)
 Mesonema Eschscholtz, 1829 accepted as Aequorea Péron & Lesueur, 1810 (synonym) · Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Leptothecata (Order) > Aequoreidae (Family)

Mesonemia
 Mesonemia Lesson, 1837 accepted as · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
 Mesonemia Godman & Salvin, 1880 accepted as Mesosemia Hübner, 1819 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Riodinidae (Family)

Mesoneuron
 Mesoneuron Desfontaines, 1818 accepted as Caesalpinia Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)
 Mesoneuron Ching, 1963 accepted as Mesophlebion Holttum, 1971 · Plantae (Kingdom) > Tracheophyta (Phylum) > Polypodiopsida (Class) > Polypodiales (Order) > Thelypteridaceae (Family)

Mesonevra
     Mesonevra Lioy, 1864 accepted as Mesonevra Lioy, 1864 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
 Mesonevra Agassiz, 1846 accepted as Mesonevra Agassiz, 1846 (Unjustified (?) emendation) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Tenthredinidae (Family)

Mesonyssoides
     Mesonyssoides Fain & Nadchatram, 1962 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Rhinonyssidae (Family)
 Mesonyssoides Strandtmann & Clifford, 1962 accepted as Tinaminyssus Strandtmann & Wharton, 1958 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Rhinonyssidae (Family)

Mesopanorpa
     Mesopanorpa Tillyard, 1918 † accepted as Mesopanorpa Tillyard, 1918 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Mecoptera (Order) > Mesopanorpodidae (Family)
     Mesopanorpa Handlirsch, 1906 † accepted as Mesopanorpa Handlirsch, 1906 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Mecoptera (Order) > Mecoptera (awaiting allocation) (Family)

Mesopelopia
     Mesopelopia Kalugina in Kalugina & Kovalev, 1985 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Chironomidae (Family)
     Mesopelopia Roback, 1971 accepted as Mesopelopia Roback, 1971 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Chironomidae (Family)

Mesopeltis
     Mesopeltis Masi, 1917 accepted as Mesopeltis Masi, 1917 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Pteromalidae (Family)
     Mesopeltis Cope, 1867 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Colubridae (Family)

Mesophaea
     Mesophaea Pascoe, 1869 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Mesophaea Fraser, 1928 accepted as Anisophaea Fraser, 1934 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Euphaeidae (Family)

Mesophila
     Mesophila Walker, 1849 accepted as Mesophila Walker, 1849 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
     Mesophila Mulsant & Verreaux, 1866 accepted as Mesophila Mulsant & Verreaux, 1866 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Mesophora
     Mesophora Borgmeier, 1937 accepted as Mesophora Borgmeier, 1937 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
 Mesophora Laseron, 1958 accepted as Coriophora Laseron, 1958 (Junior homonym of Mesophora Borgmeier, 1937) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Ptenoglossa (Order) > Triphoridae (Family)

Mesophylla
     Mesophylla Melichar, 1901 accepted as Mesophylla Melichar, 1901 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Flatidae (Family)
     Mesophylla Thomas, 1901 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Chiroptera (Order) > Phyllostomidae (Family)
     Mesophylla Dumortier, 1822 accepted as Mesophylla Dumortier, 1822 (unassessed) · Plantae (Kingdom) > Marchantiophyta (Phylum) > Jungermanniopsida (Class) > Jungermanniales (Order) > Jungermanniaceae (Family)
 Mesophylla Buschbeck, 1911 accepted as Mesopsylla Dampf, 1910 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Siphonaptera (Order) > Leptopsyllidae (Family)

Mesophyllum
     Mesophyllum Me. Lemoine, 1928 · Plantae (Kingdom) > Rhodophyta (Phylum) > Florideophyceae (Class) > Corallinales (Order) > Hapalidiaceae (Family)
     Mesophyllum Schlüter, 1889 † · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Rugosa (Order) > Rugosa (awaiting allocation) (Family)
     Mesophyllum Beauvais, 1986 † accepted as Mesophyllum Beauvais, 1986 † (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Scleractinia (Order) > Scleractinia (awaiting allocation) (Family)
     Mesophyllum Barrois, 1889 † accepted as Mesophyllum Barrois, 1889 † (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
     Mesophyllum Hahn, 1911 accepted as Mesophyllum Hahn, 1911 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
 Mesophyllum Vieira, 1942 accepted as Macrophyllum Gray, 1838 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Chiroptera (Order) > Phyllostomidae (Family)

Mesopora
     Mesopora Ehrenberg, 1854 † accepted as Mesopora Ehrenberg, 1854 † (unassessed) · Protozoa (Kingdom) > (Phylum) > Protozoa (awaiting allocation) (Class) > (Order) > (Family)
 Mesopora accepted as Mesepora Matsumura, 1914 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Tropiduchidae (Family)
 Mesopora Wesmael, 1852 accepted as Psen Latreille, 1796 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Sphecidae (Family)

Mesoporus
     Mesoporus Cameron, 1959 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Mesoporus Ryvkin in Ponomarenko & Ryvkin, 1990 † accepted as Ryvkinius Herman, 2001 † · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Mesoporus Lillick, 1937 accepted as Mesoporos Lillick, 1937 (spelling variation) · Chromista (Kingdom) > Miozoa (Phylum) > Dinophyceae (Class) > Prorocentrales (Order) > Prorocentraceae (Family)

Mesopraocis
 Mesopraocis Kulzer, 1958 accepted as Praocis Eschscholtz, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Mesopraocis Flores & Pizarro-Araya, 2014 accepted as Praocis Eschscholtz, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Mesopristes
     Mesopristes Bleeker, 1873 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Terapontidae (Family)
     Mesopristes Bleeker, 1873 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Terapontidae (Family)
 Mesopristes Fowler, 1918 (ex Bleeker) accepted as Mesopristes Bleeker, 1873 (synonym) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Terapontidae (Family)

Mesops
     Mesops Billberg, 1820 accepted as Mesops Billberg, 1820 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Mesops Günther, 1862 accepted as Biotodoma Eigenmann & Kennedy, 1903 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Cichlidae (Family)
 Mesops Audinet-Serville, 1831 accepted as Mesopsis Bolivar, 1906 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Mesopsocus
     Mesopsocus Kolbe, 1880 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Psocoptera (Order) > Mesopsocidae (Family)
     Mesopsocus Hong, 1983 † accepted as Mesopsocus Hong, 1983 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Psocoptera (Order) > Psocoptera (awaiting allocation) (Family)

Mesoptera
 Mesoptera Rafinesque, 1833 accepted as Liparis L.C. Richard, 1817 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)
 Mesoptera J.D. Hooker in Bentham & J.D. Hooker, 1873 accepted as Psydrax J. Gaertner, 1788 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)

Mesopteryx
     Mesopteryx Hutton, 1892 † accepted as Mesopteryx Hutton, 1892 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Mesopteryx Saussure, 1870 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Mantodea (Order) > Mantidae (Family)
     Mesopteryx Pilsbry & Olsson, 1945 accepted as Mesopteryx Pilsbry & Olsson, 1945 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Mesorchis
 Mesorchis Dietz, 1909 accepted as Stephanoprora Odhner, 1902 (synonym) · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Plagiorchiida (Order) > Echinochasmidae (Family)
 Mesorchis Linton, 1910 accepted as Antorchis Linton, 1911 (junior homonym) · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Plagiorchiida (Order) > Faustulidae (Family)

Mesorhinus
     Mesorhinus Ameghino, 1885 † accepted as Mesorhinus Ameghino, 1885 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)
     Mesorhinus Jaekel, 1910 accepted as Mesorhinus Jaekel, 1910 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)

Mesorthophlebia
     Mesorthophlebia Willmann, 1989 accepted as Mesorthophlebia Willmann, 1989 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Mecoptera (Order) > Mecoptera (awaiting allocation) (Family)
     Mesorthophlebia Hong, 1983 † accepted as Mesorthophlebia Hong, 1983 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Mecoptera (Order) > Mecoptera (awaiting allocation) (Family)

Mesosa
     Mesosa Perty, 1832 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Mesosa Latreille in Cuvier, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Mesosa Dahl, 1823 accepted as Mesosa Dahl, 1823 (Published in a suppressed work (ICZN)) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Mesosa sensu LeConte, 1852 accepted as Synaphaeta Thomson, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Mesosaurus
     Mesosaurus Barkas, 1873 † accepted as Mesosaurus Barkas, 1873 † · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Amphibia (awaiting allocation) (Order) > Amphibia (awaiting allocation) (Family)
     Mesosaurus Gervais, 1869 † · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Testudines (Order) > Mesosauridae (Family)

Mesoscarabaeus
     Mesoscarabaeus Hong, 1982 † accepted as Mesoscarabaeus Hong, 1982 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Mesoscarabaeus Zídek & Pokorný, 2008 accepted as Scarabaeus Linnaeus, 1758 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Mesoscytina
     Mesoscytina Tillyard, 1920 † accepted as Mesoscytina Tillyard, 1920 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Mesoscytina Hong, 1983 † accepted as Mesoscytina Hong, 1983 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Mesoserica
     Mesoserica Matsumura, 1911 accepted as Mesoserica Matsumura, 1911 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Mesoserica Brenske, 1898 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Mesosmylus
     Mesosmylus Krueger, 1913 accepted as Mesosmylus Krueger, 1913 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Neuroptera (Order) > Neuroptera (awaiting allocation) (Family)
     Mesosmylus Pa