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Homonyms

IRMNG homonym list - genus level - Initial letter = "X" (176)

Please note, this is a provisional homonyms list from IRMNG on 2019-09-22, 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.

Xaenia
 Xaenia Faust, 1891 accepted as Xynaea Pascoe, 1865 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Xaenia Duchassaing & Michelotti, 1860 accepted as Xenia Lamarck, 1816 · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Alcyonacea (Order) > Xeniidae (Family)

Xana
     Xana Garcia-Alcalde, 1972 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Terebratulida (Order) > Meganterididae (Family)
     Xana Kurdjumov, 1917 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Signiphoridae (Family)
     Xana Díaz Cosín, Briones & Trigo, 1989 accepted as Xana Díaz Cosín, Briones & Trigo, 1989 (unassessed) · Animalia (Kingdom) > Annelida (Phylum) > Oligochaeta (Class) > Oligochaeta (awaiting allocation) (Order) > Oligochaeta (awaiting allocation) (Family)

Xandaros
     Xandaros Maciolek, 1981 · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Spionida (Order) > Spionidae (Family)
 Xandaros Bishop, 1988 † accepted as Xandarocarcinus Karasawa, Schweitzer & Feldmann, 2011 † · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Xandarocarcinidae (Family)

Xanthea
     Xanthea Copper, 1996 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Atrypida (Order) > Atrypinidae (Family)
     Xanthea Lesson, 1837 accepted as Xanthea Lesson, 1837 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)

Xanthia
 Xanthia Hübner, 1809-1813 accepted as Xanthia Hübner, 1809-1813 (Published in a rejected work (ICZN)) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
 Xanthia Fairmaire, 1893 accepted as Xanthia Fairmaire, 1893 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Xanthidium
     Xanthidium Ehrenberg ex Ralfs, 1848 · Plantae (Kingdom) > Charophyta (Phylum) > Conjugatophyceae (Class) > Zygnematales (Order) > Desmidiaceae (Family)
     Xanthidium Robertson, 1903 accepted as Xanthidium Robertson, 1903 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Xanthidium Ehrenberg, 1834 accepted as Xanthidium Ehrenberg, 1834 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Crustacea (awaiting allocation) (Class) > Crustacea (awaiting allocation) (Order) > Crustacea (awaiting allocation) (Family)
 Xanthidium Delpino, 1871 accepted as Ambrosia Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Xantho
 Xantho Dutrochet, 1819 accepted as Xantho Dutrochet, 1819 · Animalia (Kingdom) > Annelida (Phylum) > Oligochaeta (Class) > Oligochaeta (awaiting allocation) (Order) > Oligochaeta (awaiting allocation) (Family)
     Xantho Leach, 1814 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Xanthidae (Family)
     Xantho E.J. Remy, 1849 accepted as Xantho E.J. Remy, 1849 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Xanthocera
     Xanthocera Amsel, 1953 accepted as Xanthocera Amsel, 1953 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Xanthocera Townsend, 1915 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)

Xanthochilus
     Xanthochilus Stål, 1872 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Lygaeidae (Family)
 Xanthochilus Bedel, 1909 accepted as Xanthochelus Chevrolat, 1873 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Xanthochilus Amyot, 1846 accepted as Xanthochilus Stål, 1872 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Lygaeidae (Family)

Xanthodes
     Xanthodes Guenée, 1852 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Nolidae (Family)
 Xanthodes Dana, 1852 accepted as Xanthias Rathbun, 1897 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Xanthidae (Family)

Xanthogramma
     Xanthogramma Schiner, 1860 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)
 Xanthogramma Weise, 1923 accepted as Chrysophtharta Weise, 1901 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Xantholeuca
     Xantholeuca Stephens, 1831 accepted as Xantholeuca Stephens, 1831 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Xantholeuca Hampson, 1910 accepted as Chionoxantha Hampson, 1914 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xantholinus
     Xantholinus Serville, 1825 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
     Xantholinus Dejean, 1821 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Xanthomantis
     Xanthomantis Warren in Seitz, 1909 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Pantheidae (Family)
     Xanthomantis Giglio-Tos, 1915 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Mantodea (Order) > Iridopterygidae (Family)

Xanthomima
     Xanthomima Warren, 1897 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
 Xanthomima Semenov, 1900 accepted as Colobostomus Fairmaire, 1886 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Oedemeridae (Family)

Xanthomixis
     Xanthomixis Sharpe, 1881 accepted as Xanthomixis Sharpe, 1881 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Sylviidae (Family)
 Xanthomixis Beck, 1996 accepted as Polymixis Hübner, 1820 (currently treated as subgenus of Polymixis, although an unreplaced homonym of Xanthomixis Sharpe, 1881 in Aves.) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xanthomonas
 Xanthomonas R. Scagel & J. Stein, 1961 accepted as · Chromista (Kingdom) > Ochrophyta (Phylum) > Xanthophyceae (Class) > Xanthophyceae (awaiting allocation) (Order) > Xanthophyceae (awaiting allocation) (Family)
     Xanthomonas W.J. Dowson, 1939 (Approved Lists, 1980) · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)

Xanthomus
 Xanthomus Mulsant, 1854 accepted as Cylindronotus Faldermann, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Xanthomus von Seidlitz, 1896 accepted as Gunarus Des Gozis, 1886 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Xanthopsis
 Xanthopsis Schafhäutl, 1863 accepted as Xanthopsis Schafhäutl, 1863 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Xanthidae (Family)
     Xanthopsis (A.P. de Candolle) K.H.E. Koch, 1851 accepted as Xanthopsis (A.P. de Candolle) K.H.E. Koch, 1851 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Xanthopsis A. Acloque, 1893 accepted as Catolechia Flotow, 1850 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Rhizocarpales (Order) > Rhizocarpaceae (Family)

Xanthopsora
 Xanthopsora G. Schneider & W.A. Weber in G. Schneider, 1979 accepted as Xanthopsorella K. Kalb & J. Hafellner in J. Hafellner, 1984 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Rhizocarpales (Order) > Catillariaceae (Family)
 Xanthopsora Spegazzini, 1922 accepted as Linochora F. von Höhnel, 1910 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Phyllachorales (Order) > Phyllachoraceae (Family)

Xanthoptera
     Xanthoptera Sodovsky, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Xanthoptera Guenée, 1852 accepted as Xanthoptera Guenée, 1852 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xanthosia
     Xanthosia Rudge, 1811 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Apiales (Order) > Araliaceae (Family)
     Xanthosia Bell, 1863 † · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Etyidae (Family)

Xanthosoma
     Xanthosoma Ashmead, 1888 accepted as Xanthosoma Ashmead, 1888 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Eurytomidae (Family)
     Xanthosoma H.W. Schott in H.W. Schott & Endlicher, 1832 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Alismatales (Order) > Araceae (Family)

Xanthospila
     Xanthospila Fairmaire, 1884 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xanthospila Houlbert in Oberthuer, 1918 accepted as Tosxampila Oiticica Filho, 1955 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Castniidae (Family)

Xanthostigma
     Xanthostigma Navás, 1909 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Raphidioptera (Order) > Raphidiidae (Family)
     Xanthostigma Kennedy, 1920 accepted as Xanthostigma Kennedy, 1920 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Pseudostigmatidae (Family)

Xanthothopia
 Xanthothopia Lucas, 1920 accepted as Xanthothopia Lucas, 1920 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Xanthothopia Mäklin, 1864 accepted as Strongylium Kirby, 1819 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Xanthoxylum
 Xanthoxylum H. Yabe & S. Endô, 1930 † accepted as · Plantae (Kingdom) > Plantae (awaiting allocation) (Phylum) > Plantae (awaiting allocation) (Class) > Plantae (awaiting allocation) (Order) > Plantae (awaiting allocation) (Family)
 Xanthoxylum P. Miller, 1768 accepted as Zanthoxylum Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Sapindales (Order) > Rutaceae (Family)

Xanthozona
     Xanthozona Townsend, 1908 accepted as Xanthozona Townsend, 1908 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
 Xanthozona Hampson, 1910 accepted as Xanthomera Hampson, 1914 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xanthus
 Xanthus Agassiz, 1843 accepted as Xantho Leach, 1814 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Xanthidae (Family)
     Xanthus Gistl, 1834 accepted as Melanotus Eschscholtz, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)
 Xanthus Dietz, 1891 accepted as Dietzianus Sleeper, 1953 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Xarifa
     Xarifa Fall, 1905 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ptinidae (Family)
 Xarifa Humes, 1960 accepted as Xarifia Humes, 1960 · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Cyclopoida (Order) > Xarifiidae (Family)

Xela
     Xela Jell in Bengtson, Conway Morris, Cooper, Jell & Runnegar, 1990 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Redlichiida (Order) > Chengkouaspidae (Family)
 Xela Thompson & Vockeroth in Thompson, 1999 accepted as Cepa Thompson & Vockeroth in Thompson, 2007 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)

Xena
     Xena Narchuk, 1964 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Chloropidae (Family)
     Xena Martins-Neto, 1999 † accepted as Xena Martins-Neto, 1999 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Eolepidopterigidae (Family)

Xenacanthus
     Xenacanthus Beyrich, 1848 † · Animalia (Kingdom) > Chordata (Phylum) > Chondrichthyes (Class) > Xenacanthiformes (Order) > Xenacanthidae (Family)
 Xenacanthus Bremekamp, 1944 accepted as Strobilanthes Blume, 1826 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Acanthaceae (Family)

Xenadidactus
     Xenadidactus Damoiseau, 1979 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)
 Xenadidactus Damoiseau, 1972 accepted as Xenadidactus Damoiseau, 1979 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)

Xenapates
     Xenapates Kirby, 1882 accepted as Xenapates Kirby, 1882 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Xenapates Eaton, 1904 accepted as Xenapates Eaton, 1904 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Psychodidae (Family)

Xenaspis
     Xenaspis Osten-Sacken, 1881 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Platystomatidae (Family)
     Xenaspis Waagen, 1895 † accepted as Xenaspis Waagen, 1895 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Ceratitida (Order) > Xenodiscidae (Family)

Xenaster
     Xenaster Simonwitsch, 1871 † · Animalia (Kingdom) > Echinodermata (Phylum) > Asteroidea (Class) > Pustulosida (Order) > Xenasteridae (Family)
     Xenaster Bierig, 1939 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Xenaster Mahunka, 1970 accepted as Brasilopsis Mahunka, 1975 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Pygmephoridae (Family)

Xenella
     Xenella Cobb, 1920 · Animalia (Kingdom) > Nematoda (Phylum) > Enoplea (Class) > Trefusiida (Order) > Xenellidae (Family)
 Xenella Rauther in Kükenthal & Krumbach, 1930 accepted as Xennella Cobb, 1920 (Spelling variation) · Animalia (Kingdom) > Nematoda (Phylum) > Enoplea (Class) > Trefusiida (Order) > Xenellidae (Family)

Xenia
     Xenia Lamarck, 1816 · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Alcyonacea (Order) > Xeniidae (Family)
 Xenia M. Gerbaulet, 1992 accepted as Grahamia Gillies in W.J. Hooker & Arnott, 1833 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Anacampserotaceae (Family)
 Xenia Faust, 1894 accepted as Faustiella Berg, 1898 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Xenica
     Xenica Westwood in Doubleday & Westwood, 1851 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Nymphalidae (Family)
 Xenica Brunner, 1891 accepted as Xenicola Uvarov, 1940 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)

Xenium
     Xenium Liana, 1980 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Proscopiidae (Family)
     Xenium Gorbach, 1985 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pterioida (Order) > Pterioida (awaiting allocation) (Family)

Xenobatrisus
     Xenobatrisus Jeannel, 1949 † accepted as Xenobatrisus Jeannel, 1949 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
     Xenobatrisus Wasmann, 1918 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Xenobius
     Xenobius Zhang Fuji & Hu Qixiong, 1985 accepted as Xenobius Zhang Fuji & Hu Qixiong, 1985 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Caudata (Order) > Hynobiidae (Family)
     Xenobius Borgmeier, 1931 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Xenocara
 Xenocara Regan, 1904 accepted as Ancistrus Kner, 1854 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Siluriformes (Order) > Loricariidae (Family)
 Xenocara Pic, 1912 accepted as Xenocera Broun, 1881 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ptinidae (Family)
 Xenocara Lucas, 1920 accepted as Xenocera Broun, 1881 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ptinidae (Family)

Xenocephalus
     Xenocephalus Kaup, 1858 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Uranoscopidae (Family)
 Xenocephalus Leakey, 1965 † accepted as Megalotragus van Hoepen, 1932 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Bovidae (Family)
 Xenocephalus Wasmann, 1887 accepted as Vatesus Sharp, 1876 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Xenocera
     Xenocera Broun, 1881 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ptinidae (Family)
     Xenocera Borchmann, 1936 accepted as Xenocera Borchmann, 1936 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Xenocerus
     Xenocerus Germar in Schönherr, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthribidae (Family)
     Xenocerus Germar, 1829 accepted as Xenocerus Germar in Schönherr, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthribidae (Family)

Xenocharis
     Xenocharis Delucchi, 1954 accepted as Xenocharis Delucchi, 1954 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Xenocharis Bierig, 1934 accepted as Xenocharis Bierig, 1934 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)

Xenochirus
 Xenochirus Gilbert, 1890 accepted as Xeneretmus Gilbert in Jordan, 1903 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Scorpaeniformes (Order) > Agonidae (Family)
 Xenochirus Gloger, 1841 accepted as Petaurus Shaw, 1791 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Diprotodontia (Order) > Petauridae (Family)

Xenochroma
     Xenochroma Warren, 1902 accepted as Xenochroma Warren, 1902 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
 Xenochroma Schmidt, 1924 accepted as Monnechroma Napp & Martins, 2005 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xenococcus
     Xenococcus Silvestri, 1924 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Pseudococcidae (Family)
     Xenococcus G. Thuret in É. Bornet & G. Thuret, 1880 · Bacteria (Kingdom) > Cyanobacteria (Phylum) > Cyanophyceae (Class) > Chroococcales (Order) > Xenococcaceae (Family)

Xenocrinus
     Xenocrinus Miller, 1881 † · Animalia (Kingdom) > Echinodermata (Phylum) > Crinoidea (Class) > Monobathrida (Order) > Monobathrida (awaiting allocation) (Family)
     Xenocrinus Jahn, 1892 † accepted as Xenocrinus Jahn, 1892 † (unassessed) · Animalia (Kingdom) > Echinodermata (Phylum) > Echinodermata (awaiting allocation) (Class) > Echinodermata (awaiting allocation) (Order) > Echinodermata (awaiting allocation) (Family)

Xenocypris
     Xenocypris Triebel, 1962 accepted as Xenocypris Triebel, 1962 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Ostracoda (awaiting allocation) (Order) > Ostracoda (awaiting allocation) (Family)
     Xenocypris Günther, 1868 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Cypriniformes (Order) > Cyprinidae (Family)

Xenodochus
     Xenodochus Schlechtendal, 1826 · Fungi (Kingdom) > Basidiomycota (Phylum) > Pucciniomycetes (Class) > Pucciniales (Order) > Phragmidiaceae (Family)
     Xenodochus Andrewes, 1941 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Xenodon
     Xenodon Boie in Férussac, 1826 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Colubridae (Family)
 Xenodon Rüppell, 1836 accepted as Odonus Gistel, 1848 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Tetraodontiformes (Order) > Balistidae (Family)

Xenodus
     Xenodus Miller, 1892 † accepted as Xenodus Miller, 1892 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
 Xenodus Andrewes, 1924 accepted as Xenodochus Andrewes, 1941 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Xenogaster
     Xenogaster Mason, 1981 accepted as Xenogaster Mason, 1981 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Braconidae (Family)
     Xenogaster Wasmann, 1891 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Xenognathus
     Xenognathus Malloch, 1930 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Platystomatidae (Family)
 Xenognathus Gilbert, 1915 accepted as Conocara Goode & Bean, 1896 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Osmeriformes (Order) > Alepocephalidae (Family)
 Xenognathus Case, 1928 † accepted as Colognathus Case, 1933 † · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Procolophonomorpha (Order) > Procolophonidae (Family)
 Xenognathus Jordan, 1928 accepted as Ganthoxena Alonso-Zarazaga & Lyal, 1999 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthribidae (Family)

Xenogomphus
     Xenogomphus Needham, 1944 accepted as Xenogomphus Needham, 1944 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Odonata (awaiting allocation) (Family)
     Xenogomphus Needham, 1948 accepted as Xenogomphus Needham, 1948 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Odonata (awaiting allocation) (Family)

Xenometra
     Xenometra Emery, 1917 accepted as Xenometra Emery, 1917 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Xenometra Ozaki, 1932 accepted as Ozametra Marcus, 1949 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Turbellaria (Class) > Neorhabdocoela (Order) > Umagillidae (Family)

Xenomystus
     Xenomystus Günther, 1868 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Osteoglossiformes (Order) > Notopteridae (Family)
 Xenomystus Lütken, 1874 accepted as Hemipsilichthys Eigenmann & Eigenmann, 1889 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Siluriformes (Order) > Loricariidae (Family)

Xenoneura
     Xenoneura Warren, 1896 accepted as Xenoneura Warren, 1896 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Xenoneura Scudder in Dawson, 1866 † accepted as Xenoneura Scudder in Dawson, 1866 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Orthoptera (awaiting allocation) (Family)

Xenopathia
     Xenopathia Rebel, 1902 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Blastobasidae (Family)
     Xenopathia Rebel in Staudinger & Rebel, 1901 accepted as Xenopathia Rebel, 1902 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Blastobasidae (Family)

Xenopeltis
     Xenopeltis H. Sydow & P. Sydow, 1919 · Fungi (Kingdom) > Ascomycota (Phylum) > Ascomycota incertae sedis (Class) > Ascomycota incertae sedis (Order) > Ascomycota incertae sedis (Family)
     Xenopeltis Reinwardt in Férussac, 1826 accepted as Xenopeltis Reinwardt in Férussac, 1826 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Xenopeltidae (Family)

Xenophanes
     Xenophanes Godman & Salvin, 1895 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Hesperiidae (Family)
 Xenophanes Thomson, 1877 accepted as Xenophanes Thomson, 1877 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Xenophasia
 Xenophasia Strickland, 1841 accepted as Xenophasia Strickland, 1841 (Unjustified (?) emendation) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Xenophasia Townsend, 1934 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)

Xenophasma
     Xenophasma Dognin, 1905 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Pyralidae (Family)
     Xenophasma Redtenbacher in Brunner & Redtenbacher, 1908 accepted as Xenophasma Redtenbacher in Brunner & Redtenbacher, 1908 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Phasmatodea (Order) > Phasmatidae (Family)

Xenophlebia
     Xenophlebia Demoulin, 1968 † · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Ephemeroptera (Order) > Leptophlebiidae (Family)
 Xenophlebia Riek, 1976 † accepted as Litophlebia Hubbard & Riek, 1978 † · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Ephemeroptera (Order) > Litophlebiidae (Family)

Xenopholis
     Xenopholis Peters, 1869 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Colubridae (Family)
 Xenopholis Davis, 1887 † accepted as Trewavasia White & Moy-Thomas, 1941 † · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Pycnodontiformes (Order) > Pycnodontiformes (awaiting allocation) (Family)

Xenophonus
     Xenophonus Blackwall, 1864 accepted as Xenophonus Blackwall, 1864 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Arachnida (awaiting allocation) (Order) > Arachnida (awaiting allocation) (Family)
     Xenophonus Müller, 1942 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Xenoplia
     Xenoplia Warren, 1894 accepted as Xenoplia Warren, 1894 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Xenoplia Medvedev, 1952 accepted as Xenoplia Medvedev, 1952 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)

Xenopoma
     Xenopoma Crosse, 1890 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Pomatiidae (Family)
     Xenopoma Willdenow, 1811 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Lamiaceae (Family)

Xenopopillia
     Xenopopillia Kolbe, 1968 accepted as Xenopopillia Kolbe, 1968 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Xenopopillia Kolbe, 1910 accepted as Popillia Serville, 1825 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Xenoppia
     Xenoppia Mahunka, 1982 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Oribatida (Order) > Oppiidae (Family)
     Xenoppia Townsend, 1915 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Sarcophagidae (Family)

Xenops
     Xenops Illiger, 1811 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Furnariidae (Family)
 Xenops Leach, 1815 accepted as Xenos Rossi, 1794 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Strepsiptera (Order) > Stylopidae (Family)

Xenopsis
     Xenopsis Saunders, 1867 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)
 Xenopsis Johnson, 1969 accepted as Austrosiphon Fisher, 1954 · Animalia (Kingdom) > Sipuncula (Phylum) > Sipunculidea (Class) > Sipunculoidea (Order) > Sipunculidae (Family)

Xenopteryx
     Xenopteryx Dybas, 1961 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ptiliidae (Family)
 Xenopteryx Pagenstecher, 1909 accepted as Xeropteryx Butler, 1883 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xenopus
     Xenopus Wagler, 1827 · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Anura (Order) > Pipidae (Family)
     Xenopus Penzig & P.A. Saccardo, 1901 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Agaricomycetes incertae sedis (Order) > Agaricomycetes incertae sedis (Family)
 Xenopus Roelofs, 1875 accepted as Ixalma Pascoe, 1871 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Xenopyxis
     Xenopyxis Townsend, 1940 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
 Xenopyxis Gilbert, 1915 accepted as Xeneretmus Gilbert in Jordan, 1903 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Scorpaeniformes (Order) > Agonidae (Family)

Xenorhinus
 Xenorhinus Leconte & Horn, 1883 accepted as Rhinomalus Gemminger in Harold, 1870 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cucujidae (Family)
 Xenorhinus Faust, 1886 accepted as Beardiella Alonso-Zarazaga & Lyal, 1999 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Xenoscelis
     Xenoscelis Wollaston, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Erotylidae (Family)
 Xenoscelis Sen Gupta & Crowson, 1971 accepted as Xenoscelis Wollaston, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Erotylidae (Family)

Xenosina
     Xenosina Malloch, 1925 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Muscidae (Family)
     Xenosina Warren, 1900 accepted as Xenosina Warren, 1900 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Xenosoma
     Xenosoma H. Sydow & P. Sydow, 1921 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Agaricomycetes incertae sedis (Order) > Agaricomycetes incertae sedis (Family)
     Xenosoma Felder, 1874 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Arctiidae (Family)
     Xenosoma Chamberlin, 1945 accepted as Xenosoma Chamberlin, 1945 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Diplopoda (Class) > Polydesmida (Order) > Paradoxosomatidae (Family)

Xenostephanus
     Xenostephanus Arkell & Callomon, 1963 † · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Ammonitida (Order) > Perisphinctidae (Family)
     Xenostephanus Simpson, Minoprio & Patterson, 1962 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Notoungulata (Order) > Acoelodidae (Family)

Xenostigmus
     Xenostigmus Smith, 1944 accepted as Xenostigmus Smith, 1944 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Braconidae (Family)
 Xenostigmus Riek, 1966 accepted as Bortesia Pagliano & Scaramozzino, 1989 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Torymidae (Family)

Xenostrobus
     Xenostrobus R. Daber, 1957 † accepted as Xenostrobus R. Daber, 1957 † (unassessed) · Plantae (Kingdom) > Plantae (awaiting allocation) (Phylum) > Plantae (awaiting allocation) (Class) > Plantae (awaiting allocation) (Order) > Plantae (awaiting allocation) (Family)
     Xenostrobus Wilson, 1967 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Mytiloida (Order) > Mytilidae (Family)

Xenostylus
     Xenostylus Bates, 1885 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xenostylus Goin, Case, Woodburne, Vizcaíno & Reguero, 1999 † accepted as · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Marsupialia (awaiting allocation) (Order) > Marsupialia (awaiting allocation) (Family)

Xenotermes
     Xenotermes Holmgren, 1912 accepted as Xenotermes Holmgren, 1912 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Blattodea (Order) > Isoptera_(awaiting_allocation) (Family)
     Xenotermes Wasmann, 1896 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Xenotherium
     Xenotherium Ameghino, 1904 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Notoungulata (Order) > Mesotheriidae (Family)
 Xenotherium Douglass, 1905 † accepted as Epoicotherium Simpson, 1927 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Cimolesta (Order) > Epoicotheriidae (Family)

Xenothyris
     Xenothyris Ching, Sun & Rong, 1976 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Terebratulida (Order) > Terebrataliidae (Family)
     Xenothyris Townes, 1969 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Ichneumonidae (Family)

Xenurus
     Xenurus Boie, 1826 accepted as Xenurus Boie, 1826 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Xenurus Wagler, 1830 accepted as Cabassous McMurtrie in Cuvier, 1831 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Cingulata (Order) > Dasypodidae (Family)

Xenus
     Xenus J. Kohlmeyer & B. Volkmann-Kohlmeyer, 1992 · Fungi (Kingdom) > Ascomycota (Phylum) > Eurotiomycetes (Class) > Pyrenulales (Order) > Pyrenulales incertae sedis (Family)
     Xenus Kaup, 1829 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Charadriiformes (Order) > Scolopacidae (Family)
 Xenus Péringuey, 1899 accepted as Aphrotus Péringuey, 1904 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Xenus Agassiz, 1846 accepted as Xenos Rossi, 1794 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Strepsiptera (Order) > Stylopidae (Family)

Xeris
     Xeris Costa, 1894 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Siricidae (Family)
     Xeris Medicus, 1791 accepted as Xeris Medicus, 1791 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Iridaceae (Family)

Xerobia
     Xerobia Stål, 1873 accepted as Xerobia Stål, 1873 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Xerobia Gistel, 1856 accepted as Cleonis Dejean, 1821 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Xerocarpa
 Xerocarpa (G. Don) E. Spach, 1840 accepted as Xerocarpa (G. Don) E. Spach, 1840 (nomen rejiciendum) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Goodeniaceae (Family)
 Xerocarpa H.J. Lam, 1919 accepted as Teijsmanniodendron Koorders, 1904 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Lamiaceae (Family)

Xerocarpus
 Xerocarpus P.A. Karsten, 1881 accepted as Phanerochaete P.A. Karsten, 1889 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Polyporales (Order) > Phanerochaetaceae (Family)
 Xerocarpus Guillemin & Perrottet in Guillemin, Perrottet & A. Richard, 1832 accepted as Rothia Persoon, 1807 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)

Xerococcus
     Xerococcus Ferris, 1921 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Eriococcidae (Family)
     Xerococcus Oersted, 1852 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)

Xerodesmus
     Xerodesmus Cook, 1896 accepted as Xerodesmus Cook, 1896 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Myriapoda (awaiting allocation) (Class) > Myriapoda (awaiting allocation) (Order) > Myriapoda (awaiting allocation) (Family)
 Xerodesmus Chamberlin, 1923 accepted as Kapyrodesmus Attems, 1940 · Animalia (Kingdom) > Arthropoda (Phylum) > Diplopoda (Class) > Polydesmida (Order) > Pyrgodesmidae (Family)

Xerophila
 Xerophila Gould, 1841 accepted as Aphelocephala Oberholser, 1899 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Pardalotidae (Family)
 Xerophila Held, 1837 accepted as Theba Risso, 1826 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Oxychilidae (Family)

Xerophyllum
     Xerophyllum Fairmaire, 1846 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tetrigidae (Family)
     Xerophyllum A. Michaux, 1803 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Liliales (Order) > Melanthiaceae (Family)

Xeroplana
     Xeroplana Monterosato, 1893 accepted as Xeroplana Monterosato, 1893 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Xeroplana Briquet, 1895 accepted as Stilbe P.J. Bergius, 1767 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Stilbaceae (Family)

Xeropteryx
     Xeropteryx Kiriakoff, 1963 accepted as Xeropteryx Kiriakoff, 1963 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Xeropteryx Butler, 1883 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
 Xeropteryx Redtenbacher in Brunner v. Wattenwyl, 1895 accepted as Xerophyllopteryx Rehn, 1905 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)

Xestia
     Xestia Hübner, 1818 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
 Xestia Audinet-Serville, 1834 accepted as Coleoxestia Aurivillius in Schenkling, 1912 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xestocis
 Xestocis Lea, 1913 accepted as Calpurnius Zimmerman, 1994 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Xestocis Casey, 1898 accepted as Cis Latreille, 1796 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ciidae (Family)

Xestonotellus
 Xestonotellus Reuter, 1905 accepted as Trilaccus Horváth, 1902 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Miridae (Family)
 Xestonotellus Horváth, 1914 accepted as Scopiastella Slater, 1957 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Lygaeidae (Family)

Xestonotus
     Xestonotus Leconte, 1854 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
     Xestonotus Föerster, 1856 accepted as Xestonotus Föerster, 1856 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Scelionidae (Family)
 Xestonotus Kuwert, 1894 accepted as Stigmatium Gray, 1832 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cleridae (Family)

Xiadongoceras
     Xiadongoceras Lai & Xu in Zeng Ni, Xu, Zhou, Wang, Li, Lai & Xiang, 1983 † accepted as Xiadongoceras Lai & Xu in Zeng Ni, Xu, Zhou, Wang, Li, Lai & Xiang, 1983 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Cephalopoda (awaiting allocation) (Order) > Cephalopoda (awaiting allocation) (Family)
     Xiadongoceras Xu & Lai, 1983 † accepted as Xiadongoceras Xu & Lai, 1983 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Cephalopoda (awaiting allocation) (Order) > Cephalopoda (awaiting allocation) (Family)

Xilophagus
 Xilophagus Latreille in Cuvier, 1829 accepted as Xylophagus Meigen, 1803 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Xylophagidae (Family)
 Xilophagus Geinitz, 1845 accepted as Xylophaga Turton, 1822 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Myoida (Order) > Pholadidae (Family)

Xinjiangia
     Xinjiangia Hong, 1983 † accepted as Xinjiangia Hong, 1983 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Trichoptera (Order) > Trichoptera (awaiting allocation) (Family)
     Xinjiangia Zhang, 1981 † accepted as Xinjiangia Zhang, 1981 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)
     Xinjiangia Huang & Murayama, 1988 accepted as Xinjiangia Huang & Murayama, 1988 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Xiphidia
     Xiphidia Dallas accepted as Xiphidia Dallas (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
     Xiphidia Coding, 1930 accepted as Xiphidia Coding, 1930 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Membracidae (Family)
 Xiphidia Lepeletier, 1823 accepted as Xiphidia Lepeletier, 1823 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Xiphidion
     Xiphidion Audinet-Serville, 1831 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)
     Xiphidion Dixon in Sowerby, 1846 † accepted as Xiphidion Dixon in Sowerby, 1846 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Crustacea (awaiting allocation) (Class) > Crustacea (awaiting allocation) (Order) > Crustacea (awaiting allocation) (Family)
     Xiphidion Provancher, 1875 accepted as Xiphidion Provancher, 1875 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Xiphidion Girard, 1858 accepted as Xiphister Jordan, 1880 (synonym) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Stichaeidae (Family)

Xiphidium
 Xiphidium Burmeister, 1838 accepted as Xiphidium Burmeister, 1838 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)
 Xiphidium Dixon, 1850 † accepted as Xiphidium Dixon, 1850 † (Unjustified (?) emendation) · Animalia (Kingdom) > Arthropoda (Phylum) > Crustacea (awaiting allocation) (Class) > Crustacea (awaiting allocation) (Order) > Crustacea (awaiting allocation) (Family)
     Xiphidium Aublet, 1775 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Commelinales (Order) > Haemodoraceae (Family)
 Xiphidium accepted as Xiphidion Girard, 1858 (misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Stichaeidae (Family)

Xiphiozona
     Xiphiozona Berry, 1919 accepted as Xiphiozona Berry, 1919 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Xiphiozona Berry, 1919 accepted as Leptochiton Gray, 1847 · Animalia (Kingdom) > Mollusca (Phylum) > Polyplacophora (Class) > Lepidopleurida (Order) > Leptochitonidae (Family)

Xiphistes
     Xiphistes Stål, 1866 accepted as Xiphistes Stål, 1866 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Xiphistes Jordan & Starks, 1895 accepted as Phytichthys Hubbs in Jordan, 1923 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Stichaeidae (Family)

Xiphiurus
 Xiphiurus Gaud & Mouchet, 1959 accepted as Gaudiomouchetus Özdikmen, 2008 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Astigmata (Order) > Pterolichidae (Family)
     Xiphiurus Smith, 1847 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Ophidiiformes (Order) > Ophidiidae (Family)

Xiphocephalus
     Xiphocephalus Théodoridès, 1964 · Chromista (Kingdom) > Miozoa (Phylum) > Gregarinomorphea (Class) > Arthrogregarida (Order) > Stylocephalidae (Family)
 Xiphocephalus Bovallius, 1890 accepted as Rhabdosoma Adams & White, 1849 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Oxycephalidae (Family)

Xiphocera
 Xiphocera Macquart, 1834 accepted as Ancylorhynchus Berthold in Latreille, 1827 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Asilidae (Family)
 Xiphocera Burmeister, 1838 accepted as Lamarckiana Kirby, 1910 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Pamphagidae (Family)

Xiphochaeta
     Xiphochaeta Mesnil, 1968 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
     Xiphochaeta Poeppig in Poeppig & Endlicher, 1843 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Xiphochilus
     Xiphochilus Nardo, 1847 accepted as Xiphochilus Nardo, 1847 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Pycnogonida (Class) > Pantopoda (Order) > Pantopoda (awaiting allocation) (Family)
 Xiphochilus Bleeker, 1857 accepted as Xiphocheilus Bleeker, 1857 (misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Labridae (Family)

Xiphomyia
     Xiphomyia Townsend, 1917 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
     Xiphomyia Artemiev, 1991 accepted as Xiphomyia Artemiev, 1991 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Psychodidae (Family)

Xiphonotus
     Xiphonotus Lacordaire, 1854 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Histeridae (Family)
 Xiphonotus Marseul, 1856 accepted as Xiphonotus Lacordaire, 1854 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Histeridae (Family)

Xiphophora
     Xiphophora Montagne, 1842 · Chromista (Kingdom) > Ochrophyta (Phylum) > Phaeophyceae (Class) > Fucales (Order) > Xiphophoraceae (Family)
     Xiphophora Saussure, 1859 accepted as Xiphophora Saussure, 1859 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Romaleidae (Family)

Xiphophyllum
     Xiphophyllum Beier, 1960 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)
     Xiphophyllum M.D. Zalessky in M.D. Zalessky & E.F. Tschirkova, 1937 † accepted as Xiphophyllum M.D. Zalessky in M.D. Zalessky & E.F. Tschirkova, 1937 † (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Pinopsida (Class) > Cordaitales (Order) > Cordaitales (awaiting allocation) (Family)
 Xiphophyllum J.K. Ehrhart, 1789 accepted as Cephalanthera L.C. Richard, 1817 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)

Xiphoramphus
     Xiphoramphus Blyth, 1843 accepted as Xiphoramphus Blyth, 1843 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Sylviidae (Family)
 Xiphoramphus accepted as Xiphorhamphus Müller & Troschel, 1844 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Characiformes (Order) > Acestrorhynchidae (Family)

Xiphorhamphus
 Xiphorhamphus Blyth, 1843 accepted as Xiphirhynchus Blyth, 1842 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Sylviidae (Family)
 Xiphorhamphus Müller & Troschel, 1844 accepted as Acestrorhynchus Eigenmann & Kennedy, 1903 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Characiformes (Order) > Acestrorhynchidae (Family)

Xiphorhynchus
     Xiphorhynchus Swainson, 1827 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Furnariidae (Family)
     Xiphorhynchus Wagler, 1830 accepted as Xiphorhynchus Wagler, 1830 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
 Xiphorhynchus Agassiz in Spix & Agassiz, 1829 accepted as Acestrorhynchus Eigenmann & Kennedy, 1903 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Characiformes (Order) > Acestrorhynchidae (Family)
 Xiphorhynchus Léger, 1893 accepted as Pyxinia Hammerschmidt, 1838 · Chromista (Kingdom) > Miozoa (Phylum) > Gregarinomorphea (Class) > Arthrogregarida (Order) > Actinocephalidae (Family)

Xiphosoma
     Xiphosoma Wagler in Spix, 1824 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Boidae (Family)
 Xiphosoma Marshall, 1892 accepted as Eiphosoma Cresson, 1865 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Ichneumonidae (Family)

Xiphostoma
     Xiphostoma Kirby & Spence, 1828 accepted as Xiphostoma Kirby & Spence, 1828 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Xiphostoma Agassiz in Spix & Agassiz, 1829 accepted as Boulengerella Eigenmann, 1903 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Characiformes (Order) > Ctenoluciidae (Family)

Xiphotheca
     Xiphotheca Ecklon & Zeyher, 1836 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)
     Xiphotheca de Wever in de Wever, Sanfilippo, Riedel & Gruber, 1979 † · Chromista (Kingdom) > Retaria (Phylum) > Polycystinea (Class) > Nassellaria (Order) > Nassellaria (awaiting allocation) (Family)
 Xiphotheca Agassiz, 1846 accepted as Lepidopus Goüan, 1770 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Trichiuridae (Family)

Xiphura
 Xiphura Agassiz, 1846 accepted as Xiphura Agassiz, 1846 (Unjustified (?) emendation) · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Amphibia (awaiting allocation) (Order) > Amphibia (awaiting allocation) (Family)
     Xiphura Brullé, 1832 accepted as Xiphura Brullé, 1832 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
     Xiphura Gray, 1830 accepted as Xiphura Gray, 1830 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)

Xishania
     Xishania Hong, 1982 † accepted as Xishania Hong, 1982 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Xishania Hu in Chen, Luo, Hu, Yin, Jiang, Wu, Li & Chen, 2002 † accepted as Xishania Hu in Chen, Luo, Hu, Yin, Jiang, Wu, Li & Chen, 2002 † (unassessed) · Animalia (Kingdom) > Problematica (Phylum) > Problematica (awaiting allocation) (Class) > Problematica (awaiting allocation) (Order) > Problematica (awaiting allocation) (Family)

Xizangia
     Xizangia D.Y. Hong, 1986 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Scrophulariaceae (Family)
     Xizangia Zhang, 1988 accepted as Xizangia Zhang, 1988 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Trogidae (Family)
     Xizangia Zhang, 1982 † accepted as Xizangia Zhang, 1982 † (unassessed) · Protozoa (Kingdom) > (Phylum) > (Class) > Sarcomastigota (awaiting allocation) (Order) > Sarcomastigota (awaiting allocation) (Family)
     Xizangia Song, Zhu & Zhang, 2004 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Gnaphosidae (Family)

Xya
     Xya Latreille, 1809 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tridactylidae (Family)
 Xya Herrmannsen, 1849 accepted as Xya Herrmannsen, 1849 (Misspelling) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Xylaria
     Xylaria Hill ex Schrank, 1789 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Xylariales (Order) > Xylariaceae (Family)
 Xylaria J. Hill ex S.F. Gray, 1821 accepted as Xylaria J. Hill ex S.F. Gray, 1821 (nomen rejiciendum) · Fungi (Kingdom) > Ascomycota (Phylum) > Ascomycota incertae sedis (Class) > Ascomycota incertae sedis (Order) > Ascomycota incertae sedis (Family)
 Xylaria Hill ex Greville, 1823 accepted as Cordyceps E.M. Fries, 1824 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Hypocreales (Order) > Cordycipitaceae (Family)

Xylariopsis
     Xylariopsis Bates, 1884 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xylariopsis F.L. Tai, 1934 accepted as Konradia Raciborski, 1900 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Hypocreales (Order) > Clavicipitaceae (Family)

Xyleborus
     Xyleborus R.C. Harris & Ladd, 2007 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Lecanorales (Order) > Stereocaulaceae (Family)
     Xyleborus Eichhoff, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Xyleborus Bowdich, 1825 accepted as Xyleborus Bowdich, 1825 (Suppressed name (ICZN)) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)

Xylinades
 Xylinades Latreille, 1828 accepted as Xylinada Berthold in Latreille, 1827 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthribidae (Family)
 Xylinades Gyllenhal in Schönherr, 1833 accepted as Xylinada Berthold in Latreille, 1827 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthribidae (Family)

Xylita
     Xylita Paykull, 1798 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Melandryidae (Family)
 Xylita Redtenbacher, 1858 accepted as Zilora Mulsant, 1856 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Melandryidae (Family)

Xylobius
     Xylobius Guérin in Spinola, 1841 accepted as Xylobius Guérin in Spinola, 1841 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cleridae (Family)
     Xylobius Dawson, 1860 † accepted as Xylobius Dawson, 1860 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Myriapoda (awaiting allocation) (Class) > Myriapoda (awaiting allocation) (Order) > Myriapoda (awaiting allocation) (Family)
 Xylobius Latreille, 1834 accepted as Xylophilus Mannerheim, 1823 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Eucnemidae (Family)

Xyloborus
     Xyloborus Kirby & Spence, 1828 accepted as Xyloborus Kirby & Spence, 1828 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Xyloborus Dejean, 1834 accepted as Xyloborus Dejean, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Xyloborus Motschulsky, 1858 accepted as Rhipidandrus Leconte, 1862 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Xyloceras
     Xyloceras Zhuravleva, 1978 † accepted as Xyloceras Zhuravleva, 1978 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Cephalopoda (awaiting allocation) (Order) > Cephalopoda (awaiting allocation) (Family)
 Xyloceras A.L. Smith, 1901 accepted as Xylobotryum Patouillard, 1895 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Dothideomycetes incertae sedis (Order) > Dothideomycetes incertae sedis (Family)

Xylococcus
     Xylococcus Nuttall, 1842 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Ericaceae (Family)
     Xylococcus Loew, 1883 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Margarodidae (Family)
 Xylococcus R. Brown ex J. Britten & S. Moore accepted as Petalostigma F. von Mueller, 1857 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Picrodendraceae (Family)

Xylodes
     Xylodes Lang & Smith, 1927 † accepted as Xylodes Lang & Smith, 1927 † (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Stauriida (Order) > Entelophyllidae (Family)
     Xylodes Waterhouse, 1876 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ptinidae (Family)

Xylodryas
     Xylodryas Turner, 1922 accepted as Xylodryas Turner, 1922 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
 Xylodryas Meyrick, 1925 accepted as Xylodryadella Fletcher, 1940 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Oecophoridae (Family)

Xyloecus
     Xyloecus Shuckard, 1837 † accepted as Xyloecus Shuckard, 1837 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Xyloecus Boisduval & Lacordaire, 1835 accepted as Xyloecus Boisduval & Lacordaire, 1835 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Eucnemidae (Family)
     Xyloecus Dejean, 1833 accepted as Xylophilus Mannerheim, 1823 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Eucnemidae (Family)

Xylographus
     Xylographus Mellié, 1849 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ciidae (Family)
     Xylographus Dejean, 1835 accepted as Xylographus Mellié, 1849 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ciidae (Family)

Xylolaemus
     Xylolaemus Redtenbacher, 1858 accepted as Xylolaemus Redtenbacher, 1858 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Xylolaemus Dejean, 1835 accepted as Xylolaemus Dejean, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Xylolaemus Reitter, 1882 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Zopheridae (Family)

Xyloma
     Xyloma Rafinesque, 1837 · Fungi (Kingdom) > Fungi (awaiting allocation) (Phylum) > Fungi (awaiting allocation) (Class) > Fungi (awaiting allocation) (Order) > Fungi (awaiting allocation) (Family)
 Xyloma Persoon, 1794 accepted as Rhytisma E.M. Fries, 1818 · Fungi (Kingdom) > Ascomycota (Phylum) > Leotiomycetes (Class) > Rhytismatales (Order) > Rhytismataceae (Family)

Xylon
 Xylon O. Kuntze, 1891 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malvales (Order) > Malvaceae (Family)
     Xylon P. Miller, 1754 accepted as Xylon P. Miller, 1754 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malvales (Order) > Malvaceae (Family)
     Xylon Linnaeus, 1758 accepted as Xylon Linnaeus, 1758 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malvales (Order) > Malvaceae (Family)

Xylonichus
     Xylonichus Boisduval, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
     Xylonichus Dejean, 1833 accepted as Xylonichus Dejean, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)

Xylopertha
     Xylopertha Guérin-Méneville, 1845 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Bostrichidae (Family)
     Xylopertha Lucas, 1849 accepted as Xylopertha Lucas, 1849 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)

Xylophagus
     Xylophagus Link ex Murrill, 1903 accepted as Xylophagus Link ex Murrill, 1903 (unassessed) · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Polyporales (Order) > Meruliaceae (Family)
     Xylophagus Meigen, 1803 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Xylophagidae (Family)
 Xylophagus Link, 1809 accepted as Serpula (Persoon) S.F. Gray, 1821 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Boletales (Order) > Serpulaceae (Family)

Xylophilus
     Xylophilus Willems et al., 1987 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Betaproteobacteria (Class) > Burkholderiales (Order) > Burkholderiales incertae sedis (Family)
     Xylophilus Latreille, 1825 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Aderidae (Family)
     Xylophilus Mannerheim, 1823 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Eucnemidae (Family)
 Xylophilus Curtis, 1830 accepted as Euglenes Westwood, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Aderidae (Family)

Xylophylla
     Xylophylla Hampson, 1913 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
 Xylophylla Linnaeus, 1771 accepted as Phyllanthus Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Phyllanthaceae (Family)

Xylorhiza
     Xylorhiza Laporte in Brullé, 1840 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Xylorhiza T. Nuttall, 1840 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Xylorhiza R.A. Salisbury, 1866 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Liliales (Order) > Liliaceae (Family)
     Xylorhiza Dejean, 1835 accepted as Xylorhiza Laporte in Brullé, 1840 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xylosphaeria
     Xylosphaeria M.C. Cooke, 1879 · Fungi (Kingdom) > Ascomycota (Phylum) > Ascomycota incertae sedis (Class) > Ascomycota incertae sedis (Order) > Ascomycota incertae sedis (Family)
 Xylosphaeria G.H. Otth, 1869 accepted as Mycothyridium Petrak, 1962 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Dothideomycetes incertae sedis (Order) > Dothideomycetes incertae sedis (Family)

Xylospongia
     Xylospongia Gray, 1869 † · Animalia (Kingdom) > Porifera (Phylum) > Hexactinellida (Class) > Lychniscosida (Order) > Lychniscosa (awaiting allocation) (Family)
     Xylospongia Hérenger, 1942 † accepted as Xylospongia Hérenger, 1942 † (unassessed) · Animalia (Kingdom) > Porifera (Phylum) > Porifera (awaiting allocation) (Class) > Porifera (awaiting allocation) (Order) > Porifera (awaiting allocation) (Family)

Xyloterus
     Xyloterus Hartig, 1837 accepted as Xyloterus Hartig, 1837 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Xyloterus Erichson, 1836 accepted as Trypondendron Stephens, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Xylotheca
     Xylotheca Hochstetter, 1843 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Achariaceae (Family)
 Xylotheca Reitter, 1897 accepted as Tricorynus Waterhouse, 1849 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ptinidae (Family)

Xylotrogus
 Xylotrogus Agassiz, 1846 accepted as Thorictus Germar, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Histeridae (Family)
 Xylotrogus Stephens, 1830 accepted as Lyctus Fabricius, 1792 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Latridiidae (Family)

Xylotrupes
     Xylotrupes Hope, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
     Xylotrupes Dejean, 1835 accepted as Xylotrupes Dejean, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Bostrichidae (Family)

Xylotrya
     Xylotrya Menke, 1830 accepted as Xylotrya Menke, 1830 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Myoida (Order) > Teredinidae (Family)
 Xylotrya Blainville, 1828 accepted as Bankia Gray, 1842 (synonym) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Myoida (Order) > Teredinidae (Family)

Xymenella
     Xymenella Finlay, 1926 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Muricidae (Family)
     Xymenella Allan, 1927 accepted as Xymenella Finlay, 1926 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Muricidae (Family)

Xyphocera
 Xyphocera Latreille, 1807 accepted as Paussus Linnaeus, 1775 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Xyphocera Bigot, 1857 accepted as Ancylorhynchus Berthold in Latreille, 1827 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Asilidae (Family)

Xyphocerus
     Xyphocerus Rafinesque, 1815 accepted as Xyphocerus Rafinesque, 1815 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Orthoptera (awaiting allocation) (Family)
 Xyphocerus accepted as Ancylorhynchus Berthold in Latreille, 1827 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Asilidae (Family)

Xyridion
     Xyridion (H.G.L. Reichenbach) Klatt, 1872 accepted as Xyridion (H.G.L. Reichenbach) Klatt, 1872 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Iridaceae (Family)
     Xyridion (Tausch) Fourreau, 1869 accepted as Xyridion (Tausch) Fourreau, 1869 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Iridaceae (Family)

Xyris
 Xyris Adanson, 1763 accepted as Xyris Adanson, 1763 (Misspelling) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Iridaceae (Family)
     Xyris Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Xyridaceae (Family)

Xyroscelis
     Xyroscelis Saunders, 1868 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)
     Xyroscelis Thomson, 1878 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)

Xysta
     Xysta Meigen, 1824 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
 Xysta Eschscholtz, 1829 accepted as Eleodes Eschscholtz, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Xystonella
     Xystonella Kofoid & Campbell, 1939 accepted as Xystonella Kofoid & Campbell, 1939 (unassessed) · Protozoa (Kingdom) > (Phylum) > Protozoa (awaiting allocation) (Class) > (Order) > (Family)
     Xystonella Brandt, 1907 · Chromista (Kingdom) > Ciliophora (Phylum) > Spirotrichea (Class) > Tintinnida (Order) > Xystonellidae (Family)

Xystonellopsis
     Xystonellopsis Jörgensen, 1924 · Chromista (Kingdom) > Ciliophora (Phylum) > Spirotrichea (Class) > Tintinnida (Order) > Xystonellidae (Family)
     Xystonellopsis Kofoid & Campbell, 1939 accepted as Xystonellopsis Kofoid & Campbell, 1939 (unassessed) · Protozoa (Kingdom) > (Phylum) > Protozoa (awaiting allocation) (Class) > (Order) > (Family)

Xystridura
     Xystridura Whitehouse, 1936 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Redlichiida (Order) > Paradoxididae (Family)
     Xystridura David, 1932 † accepted as Xystridura David, 1932 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)

Xystrodus
     Xystrodus Plieninger, 1860 † · Animalia (Kingdom) > Chordata (Phylum) > Chondrichthyes (Class) > Ctenacanthiformes (Order) > Ctenacanthiformes (awaiting allocation) (Family)
 Xystrodus Morris & Roberts, 1862 † accepted as Platyxystrodus Hay, 1899 † · Animalia (Kingdom) > Chordata (Phylum) > Chondrichthyes (Class) > Chondrenchelyiformes (Order) > Chondrenchelyiformes (awaiting allocation) (Family)

Xystrophorus
     Xystrophorus Dejean, 1833 accepted as Clada Pascoe, 1887 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ptinidae (Family)
 Xystrophorus Lesne, 1902 accepted as Clada Pascoe, 1887 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ptinidae (Family)

Xystropus
     Xystropus Solier, 1835 accepted as Xystropus Solier, 1835 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Xystropus Agassiz, 1846 accepted as Systropus Wiedemann, 1820 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Bombyliidae (Family)

Xystus
     Xystus Hartig in Germar, 1840 accepted as Xystus Hartig in Germar, 1840 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Xystus Schönherr, 1826 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Xystus Fischer de Waldheim, 1829 accepted as Cleogonus Schönherr, 1825 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Xystus Grote, 1874 accepted as Prionoxystus Grote, 1882 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Cossidae (Family)