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Homonyms

IRMNG homonym list - genus level - Initial letter = "I" (439)

Please note, this is a provisional homonyms list from IRMNG on 2019-03-22, 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.

Ianthe
     Ianthe Marseul, 1865 accepted as Ianthe Marseul, 1865 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)
 Ianthe R.A. Salisbury, 1866 accepted as Hypoxis Linnaeus, 1759 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Hypoxidaceae (Family)
     Ianthe Bovallius, 1881 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Isopoda incertae sedis (Family)

Iasis
     Iasis Savigny, 1816 · Animalia (Kingdom) > Chordata (Phylum) > Thaliacea (Class) > Salpida (Order) > Salpidae (Family)
 Iasis Lahille, 1890 accepted as Soestia Kott, 1998 · Animalia (Kingdom) > Chordata (Phylum) > Thaliacea (Class) > Salpida (Order) > Salpidae (Family)

Iberina
     Iberina Munier-Chalmas, 1902 † accepted as Iberina Munier-Chalmas, 1902 † (unassessed) · Protozoa (Kingdom) > (Phylum) > Protozoa (awaiting allocation) (Class) > (Order) > (Family)
     Iberina Simon, 1881 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Hahniidae (Family)

Iberis
     Iberis Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Brassicaceae (Family)
 Iberis J. Hill, 1756 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Brassicaceae (Family)

Iberocarterus
     Iberocarterus Csiki, 1932 accepted as Eocarterus Stichel, 1923 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Iberocarterus Antoine, 1959 accepted as Eocarterus Stichel, 1923 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Iberocypris
     Iberocypris Babinot, 1985 † accepted as Iberocypris Babinot, 1985 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Ostracoda (awaiting allocation) (Order) > Ostracoda (awaiting allocation) (Family)
     Iberocypris Doadrio, 1980 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Cypriniformes (Order) > Cyprinidae (Family)

Iberodinodes
 Iberodinodes Basilewsky & Grundmann, 1954 accepted as Chlaenius Bonelli, 1810 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Iberodinodes Wagner, 1932 accepted as Chlaenius Bonelli, 1810 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Iberospongia
     Iberospongia Garcia-Bellido & Rigby, 2004 † accepted as Iberospongia Garcia-Bellido & Rigby, 2004 † (unassessed) · Animalia (Kingdom) > Porifera (Phylum) > Hexactinellida (Class) > Reticulosa (Order) > Protospongiidae (Family)
     Iberospongia García-Bellido, 2002 † accepted as Iberospongia García-Bellido, 2002 † · Animalia (Kingdom) > Porifera (Phylum) > Hexactinellida (Class) > Reticulosa (Order) > Protospongiidae (Family)

Iberozabrus
 Iberozabrus Ganglbauer, 1931 accepted as Zabrus Schellenberg, 1806 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Iberozabrus Jeannel, 1942 accepted as Zabrus Schellenberg, 1806 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Ibidiomorphum
 Ibidiomorphum Gemminger & Harold, 1873 accepted as Ibidiomorphum Gemminger & Harold, 1873 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Ibidiomorphum Blessig, 1873 accepted as Olenecamptus Chevrolat, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Ibidion
     Ibidion Gory, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Ibidion Audinet-Serville, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Ibidium
 Ibidium Dejean, 1830 accepted as Ibidion Gory, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Ibidium R.A. Salisbury ex J.K. Small, 1913 accepted as Spiranthes L.C. Richard, 1817 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)

Ibis
 Ibis Lacepède, 1799 accepted as Mycteria Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Ciconiiformes (Order) > Ciconiidae (Family)
 Ibis Möhring, 1758 accepted as Mycteria Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Ciconiiformes (Order) > Ciconiidae (Family)
 Ibis Temminck, 1815 accepted as Plegadis Kaup, 1829 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Ciconiiformes (Order) > Threskiornithidae (Family)

Icaria
     Icaria Schiner, 1868 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tephritidae (Family)
     Icaria de Saussure, 1853 accepted as Icaria de Saussure, 1853 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Vespidae (Family)
 Icaria Thomson, 1878 accepted as Icarina Alluaud, 1896 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)
     Icaria Saunders, 1871 accepted as Icarina Alluaud, 1896 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)
 Icaria Macbride, 1929 accepted as Miconia Ruiz & Pavon, 1794 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Melastomataceae (Family)

Icarus
     Icarus Röber, 1898 accepted as Icarus Röber, 1898 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Icarus accepted as Icarus (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Pionidae (Family)
 Icarus Forbes, 1844 accepted as Oxynoe Rafinesque, 1814 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sacoglossa (Order) > Oxynoidae (Family)
     Icarus A.L. de Gasper & A. Salino in A.L. de Gasper, V.A. de O. Dittrich, A.R. Smith & A. Salino, 2016 · Plantae (Kingdom) > Tracheophyta (Phylum) > Polypodiopsida (Class) > Polypodiales (Order) > Blechnaceae (Family)

Icasma
     Icasma Collin, 1928 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Empididae (Family)
     Icasma Turner, 1902 accepted as Icasma Turner, 1902 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Icelus
     Icelus Koch, 1846 accepted as Icelus Koch, 1846 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Salticidae (Family)
     Icelus Krøyer, 1845 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Scorpaeniformes (Order) > Cottidae (Family)

Icharia
 Icharia accepted as Icaria de Saussure, 1853 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Vespidae (Family)
 Icharia Rothschild, 1911 accepted as Ichoria Butler, 1876 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Arctiidae (Family)

Ichneugale
     Ichneugale Jourdan, 1852 accepted as Ichneugale Jourdan, 1852 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)
     Ichneugale Filhol, 1883 accepted as Ichneugale Filhol, 1883 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)

Ichneumon
     Ichneumon Linnaeus, 1758 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Ichneumonidae (Family)
 Ichneumon Lacepède, 1799 accepted as Ichneumon Lacepède, 1799 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)
 Ichneumon Frisch, 1775 accepted as Herpestes Illiger, 1811 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Herpestidae (Family)

Ichnium
     Ichnium Sollas, 1900 † accepted as Ichnium Sollas, 1900 † (unassessed) · Animalia (Kingdom) > Animalia (awaiting allocation) (Phylum) > Animalia (awaiting allocation) (Class) > Animalia (awaiting allocation) (Order) > Animalia (awaiting allocation) (Family)
     Ichnium Pabst, 1896 † accepted as Ichnium Pabst, 1896 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Amphibia (awaiting allocation) (Order) > Amphibia (awaiting allocation) (Family)

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

Ichnusa
     Ichnusa Reuss, 1939 accepted as Ichnusa Reuss, 1939 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Nymphalidae (Family)
     Ichnusa Debrenne & Naud, 1981 † accepted as Ichnusa Debrenne & Naud, 1981 † (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
 Ichnusa Jeffreys, 1847 accepted as Bela Leach, 1847 (name introduced in synonymy, not available) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Mangeliidae (Family)

Ichnusella
 Ichnusella Cottarelli, 1971 accepted as Bereraia Huys, 2009 (Preoccupied by Ichnusella, Dieni & Massari, 1966 (Foraminifera)) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Harpacticoida (Order) > Leptopontiidae (Family)
 Ichnusella Dieni & Massari, 1966 † accepted as Trocholina Paalzow, 1922 † (Opinion of Loeblich & Tappan, 1987) · Chromista (Kingdom) > Retaria (Phylum) > Tubothalamea (Class) > Involutinida (Order) > Involutinidae (Family)

Ichthidion
 Ichthidion Bolivar, 1884 accepted as Ichthyotettix Rehn, 1901 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Pyrgomorphidae (Family)
 Ichthidion Haldeman, 1843 accepted as Retocomus Casey, 1895 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthicidae (Family)

Ichthyaetus
     Ichthyaetus Sweeting in Wood, 1837 accepted as Ichthyaetus Sweeting in Wood, 1837 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Ichthyaetus Kaup, 1829 † accepted as Ichthyaetus Kaup, 1829 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Longipterygiformes (Order) > Longipterygiformes (awaiting allocation) (Family)
     Ichthyaetus Agassiz, 1846 accepted as Ichthyaetus Agassiz, 1846 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)

Ichthyaëtus
 Ichthyaëtus Agassiz, 1846 accepted as Ichthyaetus Agassiz, 1846 · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
 Ichthyaëtus Sweeting in Wood, 1837 accepted as Ichthyaetus Sweeting in Wood, 1837 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Ichthydion
     Ichthydion Dejean, 1834 accepted as Ichthydion Dejean, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthicidae (Family)
 Ichthydion Saussure, 1859 accepted as Ichthyotettix Rehn, 1901 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Pyrgomorphidae (Family)
 Ichthydion Melsheimer, 1853 accepted as Retocomus Casey, 1895 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthicidae (Family)

Ichthydium
     Ichthydium Ehrenberg, 1830 · Animalia (Kingdom) > Gastrotricha (Phylum) > Gastrotricha (awaiting allocation) (Class) > Chaetonotida (Order) > Chaetonotidae (Family)
 Ichthydium Agassiz, 1846 accepted as Ichthydium Agassiz, 1846 (Unjustified (?) emendation) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Ichthydium Ehrenberg, 1831 accepted as Ichthydium Ehrenberg, 1831 (unassessed) · Protozoa (Kingdom) > (Phylum) > Protozoa (awaiting allocation) (Class) > (Order) > (Family)

Ichthyoborus
     Ichthyoborus Kaup, 1842 accepted as Ichthyoborus Kaup, 1842 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Ichthyoborus Boulenger, 1907 accepted as Ichthyborus Günther, 1864 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Characiformes (Order) > Distichodontidae (Family)

Ichthyocolla
     Ichthyocolla Geoffroy, 1767 accepted as Ichthyocolla Geoffroy, 1767 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
 Ichthyocolla Agassiz, 1846 accepted as Ichthyocolla Agassiz, 1846 (Unjustified (?) emendation) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
 Ichthyocolla Garsault, 1764 accepted as Acipenser Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Acipenseriformes (Order) > Acipenseridae (Family)

Ichthyodes
     Ichthyodes Newman, 1842 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Ichthyodes Adelung, 1900 accepted as Ichthyodes Adelung, 1900 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Ephemeroptera (Order) > Ephemeridae (Family)

Ichthyolithus
     Ichthyolithus Germar in Keferstein, 1826 accepted as Ichthyolithus Germar in Keferstein, 1826 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
 Ichthyolithus Linnaeus, 1768 accepted as Ichthyolithus Linnaeus, 1768 (Published in a rejected work (ICZN)) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)

Ichthyophaga
 Ichthyophaga Syromjatnikova, 1949 accepted as Piscinquilinus Sluys & Kawakatsu, 2005 (preoccupied) · Animalia (Kingdom) > Platyhelminthes (Phylum) > Turbellaria (Class) > Prolecithophora (Order) > Genostomatidae (Family)
     Ichthyophaga Lesson, 1843 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Accipitriformes (Order) > Accipitridae (Family)
 Ichthyophaga Baker, 1927 accepted as Ichthyophaga Lesson, 1843 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Accipitriformes (Order) > Accipitridae (Family)

Ichthyophis
     Ichthyophis Fitzinger, 1826 · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Gymnophiona (Order) > Ichthyophiidae (Family)
 Ichthyophis Lesson, 1828 accepted as Scuticaria Jordan & Snyder, 1901 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Anguilliformes (Order) > Muraenidae (Family)

Ichthyopisthen
     Ichthyopisthen Aurivillius, 1891 accepted as Ichthyopisthen Aurivillius, 1891 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dryophthoridae (Family)
     Ichthyopisthen Roelofs, 1892 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dryophthoridae (Family)

Ichthyosoma
     Ichthyosoma Felder, 1874 accepted as Ichthyosoma Felder, 1874 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Ichthyosoma Montrouzier, 1855 accepted as Thesisternus · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Ichthyoxenus
 Ichthyoxenus auctt. accepted as Ichthyoxenos Herklots, 1870 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Cymothoidae (Family)
 Ichthyoxenus Zimmer in Krumbach & Kükenthal, 1927 accepted as Ichthyoxenus auctt. (later usage) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Cymothoidae (Family)

Icmaleus
 Icmaleus Gistel, 1856 accepted as Hydaticus Leach, 1817 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dytiscidae (Family)
 Icmaleus Gistel, 1856 accepted as Hydaticus Leach, 1817 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dytiscidae (Family)

Iconella
     Iconella A. Jurilj, 1948 · Chromista (Kingdom) > Ochrophyta (Phylum) > Bacillariophyceae (Class) > Bacillariophyceae (awaiting allocation) (Order) > Bacillariophyceae (awaiting allocation) (Family)
     Iconella Mason, 1981 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Braconidae (Family)

Ictalurus
     Ictalurus Rafinesque, 1820 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Siluriformes (Order) > Ictaluridae (Family)
 Ictalurus accepted as Felis Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Felidae (Family)

Icterodes
     Icterodes Hampson, 1895 accepted as Icterodes Hampson, 1895 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Icterodes Butler, 1878 accepted as Icterodes Butler, 1878 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Icterus
     Icterus Brisson, 1760 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Fringillidae (Family)
 Icterus Griffith in Cuvier, 1827 accepted as Arctictis Temminck, 1824 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Viverridae (Family)

Ictidopsis
     Ictidopsis Broom, 1912 † accepted as Ictidopsis Broom, 1912 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
     Ictidopsis Van Hoepen, 1916 accepted as Ictidopsis Van Hoepen, 1916 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)

Ictinaetus
     Ictinaetus Blyth, 1843 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Accipitriformes (Order) > Accipitridae (Family)
     Ictinaetus Agassiz, 1846 accepted as Ictinaetus Agassiz, 1846 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Ictinocephalus
     Ictinocephalus Page, 1859 † accepted as Ictinocephalus Page, 1859 † · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
     Ictinocephalus Powrie, 1864 † accepted as Ictinocephalus Powrie, 1864 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)

Ictinus
     Ictinus Morris in Wood, 1837 accepted as Ictinus Morris in Wood, 1837 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Ictinus Laporte, 1834 accepted as Ictinus Laporte, 1834 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Ictinus Cassini, 1818 accepted as Ictinus Cassini, 1818 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Ictinus Rambur, 1842 accepted as Ictinogomphus Cowley, 1934 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Gomphidae (Family)

Ictis
     Ictis Alder & Hancock, 1847 accepted as Ictis Alder & Hancock, 1847 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Ictis Schinz, 1827 accepted as Ictis Schinz, 1827 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Viverridae (Family)
     Ictis Schulze, 1897 accepted as Ictis Schulze, 1897 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Mustelidae (Family)
 Ictis Berthold in Latreille, 1827 accepted as Arctictis Temminck, 1824 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Viverridae (Family)
 Ictis Kaup, 1829 accepted as Mustela Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Carnivora (Order) > Mustelidae (Family)
 Ictis Candèze, 1863 accepted as Pleonomus Ménétriés, 1848 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)

Ida
     Ida Jay, 1836 accepted as Ida Jay, 1836 · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Ida Robineau-Desvoidy, 1863 accepted as Ida Robineau-Desvoidy, 1863 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
     Ida Gray, 1873 accepted as Ida Gray, 1873 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Testudines (Order) > Chelonia (awaiting allocation) (Family)
     Ida Gray, 1838 accepted as Ida Gray, 1838 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Lacertilia (awaiting allocation) (Family)

Idacantha
 Idacantha Fairmaire, 1869 accepted as Diacantha Chevrolat, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
 Idacantha Chapuis, 1875 accepted as Prosmidia Weise, 1902 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Idaea
     Idaea Treitschke, 1825 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
 Idaea Oberthür, 1880 accepted as Idea Fabricius, 1807 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Danaidae (Family)

Idaethina
     Idaethina Gemminger & Harold, 1868 accepted as Idaethina Gemminger & Harold, 1868 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Nitidulidae (Family)
 Idaethina Reitter, 1875 accepted as Australaethina Kirejtshuk & Lawrence, 1999 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Nitidulidae (Family)

Idalia
     Idalia Hübner, 1825 accepted as Idalia Hübner, 1825 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Idalia Hübner, 1819 accepted as Idalia Hübner, 1819 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lymantriidae (Family)
     Idalia Rafinesque, 1838 accepted as Idalia Rafinesque, 1838 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Solanales (Order) > Convolvulaceae (Family)
 Idalia Quatrefages, 1866 accepted as Pista Malmgren, 1866 (subjective synonym) · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Terebellida (Order) > Terebellidae (Family)
 Idalia Mulsant, 1846 accepted as Adalia Mulsant, 1846 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coccinellidae (Family)
 Idalia Gray, 1847 accepted as Doto Oken, 1815 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Nudibranchia (Order) > Dotidae (Family)
 Idalia Leuckart, 1828 accepted as Okenia Menke, 1830 (invalid: junior homonym of Idalia Huebner, [1820]; Okenia and Idalina are replacement names) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Nudibranchia (Order) > Goniodorididae (Family)

Idalina
     Idalina Schlumberger & Munier-Chalmas, 1884 † · Chromista (Kingdom) > Retaria (Phylum) > Tubothalamea (Class) > Miliolida (Order) > Hauerinidae (Family)
 Idalina Norman, 1890 accepted as Okenia Menke, 1830 (objective synonym of Okenia) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Nudibranchia (Order) > Goniodorididae (Family)

Idas
     Idas Jeffreys, 1876 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Mytiloida (Order) > Mytilidae (Family)
     Idas Mulsant, 1876 accepted as Idas Mulsant, 1876 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Idatius
     Idatius Fairmaire, 1906 accepted as Idatius Fairmaire, 1906 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Idatius Distant, 1910 accepted as Sejanus Distant, 1910 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Miridae (Family)

Iddingsia
     Iddingsia Walcott, 1924 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Ptychopariida (Order) > Dokimocephalidae (Family)
     Iddingsia Olsson, 1929 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sorbeoconcha (Order) > Cerithiidae (Family)

Idechthis
     Idechthis Hübner, 1821 accepted as Idechthis Hübner, 1821 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Idechthis Förster, 1868 accepted as Idechthis Förster, 1868 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Idesia
     Idesia Maximowicz, 1866 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Salicaceae (Family)
 Idesia Scopoli, 1777 accepted as Diospyros Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Ebenaceae (Family)

Idia
 Idia Hübner, 1809-1813 accepted as Idia Hübner, 1809-1813 (Published in a rejected work (ICZN)) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Idia Fieber, 1866 accepted as Idia Fieber, 1866 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadellidae (Family)
 Idia Lamouroux, 1816 accepted as Idiellana Cotton & Godfrey, 1942 (preoccupied [Lepidoptera]) · Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Leptothecata (Order) > Sertulariidae (Family)
 Idia Wiedemann, 1820 accepted as Stomorhina Rondani, 1861 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Calliphoridae (Family)

Idiacanthus
     Idiacanthus Peters, 1877 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Stomiiformes (Order) > Stomiidae (Family)
     Idiacanthus Gunnell, 1933 † accepted as Idiacanthus Gunnell, 1933 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Idiella
     Idiella Brauer & Bergenstamm, 1890 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Rhiniidae (Family)
 Idiella Stechow, 1919 accepted as Idiellana Cotton & Godfrey, 1942 (preoccupied ) · Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Leptothecata (Order) > Sertulariidae (Family)

Idiocerus
     Idiocerus Lewis, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadellidae (Family)
     Idiocerus Curtis, 1839 accepted as Idiocerus Curtis, 1839 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)

Idiocheila
 Idiocheila accepted as Vexillum Röding, 1798 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Costellariidae (Family)
 Idiocheila Frivaldsky, 1883 accepted as Apatetica Westwood, 1848 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Idiochila
 Idiochila Pilsbry, 1921 accepted as Vexillum Röding, 1798 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Costellariidae (Family)
 Idiochila Bernhauer & Schubert, 1910 accepted as Apatetica Westwood, 1848 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Agyrtidae (Family)

Idiochlora
 Idiochlora Prout, 1912 accepted as Dryochlora Fletcher, 1979 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Idiochlora Warren, 1896 accepted as Dryochlora Fletcher, 1979 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Idiochroa
     Idiochroa Turner, 1922 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
 Idiochroa Turner, 1947 accepted as Idioxantha Common, 1994 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Oecophoridae (Family)

Idiodamaeus
     Idiodamaeus Paschoal in Paschoal & Johnston, 1982 accepted as Idiodamaeus Paschoal in Paschoal & Johnston, 1982 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Acari (awaiting allocation) (Order) > Acari (awaiting allocation) (Family)
 Idiodamaeus Paschoal, 1984 accepted as Austrodamaeus Balogh & Mahunka, 1981 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Oribatida (Order) > Idiodamaeidae (Family)
 Idiodamaeus Paschoal, 1982 accepted as Austrodamaeus Balogh & Mahunka, 1981 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Oribatida (Order) > Idiodamaeidae (Family)

Idiolorryia
     Idiolorryia André, 1980 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Tydeidae (Family)
     Idiolorryia André, 1979 accepted as Idiolorryia André, 1980 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Tydeidae (Family)

Idiomerus
     Idiomerus Melzer, 1934 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Idiomerus Dolin in Dolin & Pritykina, 1980 † · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)
     Idiomerus Imms, 1912 accepted as Idiomerus Imms, 1912 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Collembola (Class) > (Order) > Collembola (awaiting allocation) (Family)

Idiomorpha
     Idiomorpha Förster, 1869 accepted as Idiomorpha Förster, 1869 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Idiomorpha Turner, 1946 accepted as Bakia Koçak, 1981 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Tortricidae (Family)
 Idiomorpha Croneis & Gale, 1939 † accepted as Idiomorphina Croneis & Gale, 1939 † · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Ostracoda (awaiting allocation) (Order) > Ostracoda incertae sedis (Family)

Idiomorphus
     Idiomorphus Dolin in Dolin & Pritykina, 1980 † · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)
     Idiomorphus Chaudoir, 1846 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Idiomorphus Doumet, 1861 accepted as Bicyclus Kirby, 1871 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Nymphalidae (Family)

Idioneura
     Idioneura Selys, 1860 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Protoneuridae (Family)
     Idioneura Philippi, 1865 accepted as Idioneura Philippi, 1865 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
 Idioneura Felder, 1867 accepted as Idioneurula Strand, 1932 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Nymphalidae (Family)

Idiophyllum
     Idiophyllum Cao, 1975 † · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Rugosa (Order) > Rugosa (awaiting allocation) (Family)
     Idiophyllum Lesquereux, 1880 † accepted as Idiophyllum Lesquereux, 1880 † (unassessed) · Plantae (Kingdom) > Plantae (awaiting allocation) (Phylum) > Plantae (awaiting allocation) (Class) > Plantae (awaiting allocation) (Order) > Plantae (awaiting allocation) (Family)

Idiopsis
     Idiopsis Brauer & Bergenstamm, 1890 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Rhiniidae (Family)
 Idiopsis Faust, 1897 accepted as Idiopsodes Thompson, 1977 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Idiopsis Kaszab, 1981 accepted as Kocakia Kaszab, 1985 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Idiostolus
     Idiostolus Berg, 1883 accepted as Idiostolus Berg, 1883 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Lygaeidae (Family)
 Idiostolus Ashmead, 1900 accepted as Idiostolus Ashmead, 1900 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Idiostoma
     Idiostoma Walsingham, 1882 accepted as Idiostoma Walsingham, 1882 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Idiostoma Cameron, 1905 accepted as Idiostoma Cameron, 1905 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Idiostoma Arrow, 1904 accepted as Allidiostoma Arrow, 1940 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Hybosoridae (Family)

Idiostyla
     Idiostyla Meyrick, 1921 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Cosmopterigidae (Family)
     Idiostyla Drake, 1946 accepted as Idiostyla Drake, 1946 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Tingidae (Family)

Idiotropus
     Idiotropus Fieber, 1860 accepted as Idiotropus Fieber, 1860 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Microphysidae (Family)
     Idiotropus Berg, 1883 accepted as Idiotropus Berg, 1883 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Lygaeidae (Family)

Idiotubus
     Idiotubus Kozlowski, 1938 † accepted as Idiotubus Kozlowski, 1938 † · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
     Idiotubus Kozlowski, 1948 † · Animalia (Kingdom) > Hemichordata (Phylum) > Graptolithina (Class) > Tuboidea (Order) > Tuboidea (awaiting allocation) (Family)

Idiotypa
     Idiotypa Loew, 1873 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Richardiidae (Family)
     Idiotypa Förster, 1856 accepted as Idiotypa Förster, 1856 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Idiozancla
     Idiozancla Turner, 1936 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Oecophoridae (Family)
 Idiozancla Turner, 1939 accepted as Phobetica Turner, 1944 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Gelechiidae (Family)

Idolocoris
     Idolocoris Douglas & Scott, 1865 accepted as Idolocoris Douglas & Scott, 1865 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Idolocoris Walker in Richter, 1872 accepted as Haematomyzus Piaget, 1869 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Phthiraptera (Order) > Haematomyzidae (Family)

Idolum
     Idolum Pfeiffer, 1856 accepted as Idolum Pfeiffer, 1856 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Idolum Saussure, 1869 accepted as Idolomantis Uvarov, 1940 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Mantodea (Order) > Mantidae (Family)

Idomene
     Idomene Philippi, 1843 accepted as Idomene Philippi, 1843 · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Cyclopoida (Order) > Clausidiidae (Family)
 Idomene Philippi, 1843 sensu Sars M., 1906 accepted as Xouthous Thomson G.M., 1883 (synonymy) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Harpacticoida (Order) > Pseudotachidiidae (Family)

Idotaea
 Idotaea Dana, 1849 accepted as Idotea Fabricius, 1798 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Idoteidae (Family)
 Idotaea Fabricius, 1796 accepted as Idotea Fabricius, 1798 (misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Idoteidae (Family)

Idotea
     Idotea Fabricius, 1798 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Idoteidae (Family)
 Idotea Paetel, 1875 accepted as Idotea Paetel, 1875 (Misspelling) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Cephalaspidea (Order) > Aglajidae (Family)
     Idotea Weber, 1795 accepted as · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Hippidae (Family)

Idothea
     Idothea Kunth, 1843 accepted as Idothea Kunth, 1843 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Liliales (Order) > Liliaceae (Family)
     Idothea Fabricius, 1796 accepted as Idothea Fabricius, 1796 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Idoteidae (Family)
 Idothea Agassiz, 1846 accepted as Idothea Agassiz, 1846 (Unjustified (?) emendation) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Cephalaspidea (Order) > Aglajidae (Family)
 Idothea Fabricius, 1796 accepted as Idotea Fabricius, 1798 (misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Idoteidae (Family)
 Idothea Agassiz, 1846 † accepted as Campylocephalus Eichwald, 1860 † · Animalia (Kingdom) > Arthropoda (Phylum) > Merostomata (Class) > Eurypterida (Order) > Stylonuridae (Family)
 Idothea Schumacher, 1817 accepted as Fimbria Megerle von Mühlfeld, 1811 (objective synonym of Fimbria) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Lucinidae (Family)

Iduna
     Iduna Keyserling & Blasius, 1840 accepted as Iduna Keyserling & Blasius, 1840 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Sylviidae (Family)
     Iduna Claparède & Lachmann, 1860 accepted as Iduna Claparède & Lachmann, 1860 (unassessed) · Protozoa (Kingdom) > (Phylum) > Protozoa (awaiting allocation) (Class) > (Order) > (Family)
 Iduna Boeck, 1861 accepted as Liljeborgia Spence Bate, 1862 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Liljeborgiidae (Family)

Idus
 Idus Heckel in Russegger, 1843 accepted as Leuciscus Cuvier, 1816 (synonym) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Cypriniformes (Order) > Cyprinidae (Family)
 Idus Broun, 1893 accepted as Reyesiella Alonso-Zarazaga & Lyal, 1999 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Idya
 Idya Fréminville, 1809 accepted as Beroe Gronov, 1760 · Animalia (Kingdom) > Ctenophora (Phylum) > Nuda (Class) > Beroida (Order) > Beroidae (Family)
 Idya Philippi, 1843 accepted as Tisbe Lilljeborg, 1853 (synonym) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Harpacticoida (Order) > Tisbidae (Family)

Idyellopsis
     Idyellopsis Lang, 1948 · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Harpacticoida (Order) > Idyanthidae (Family)
     Idyellopsis Lang, 1944 accepted as Idyellopsis Lang, 1948 · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Harpacticoida (Order) > Idyanthidae (Family)

Idyia
     Idyia Rafinesque, 1814 accepted as Idyia Rafinesque, 1814 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Crustacea (awaiting allocation) (Class) > Crustacea (awaiting allocation) (Order) > Crustacea (awaiting allocation) (Family)
     Idyia Linnavuori, 1960 accepted as Idyia Linnavuori, 1960 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadellidae (Family)
 Idyia Agassiz, 1846 accepted as Idyia Agassiz, 1846 (Unjustified (?) emendation) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Harpacticoida (Order) > Tisbidae (Family)
     Idyia · Animalia (Kingdom) > Ctenophora (Phylum) > Nuda (Class) > Beroida (Order) > Beroidae (Family)

Idyla
     Idyla Adams, 1855 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Clausiliidae (Family)
     Idyla Vest, 1867 accepted as Idyla Vest, 1867 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Idyopsis
 Idyopsis Sars G.O., 1905 accepted as Idyanthe Sars G.O., 1909 (synonym) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Harpacticoida (Order) > Idyanthidae (Family)
 Idyopsis Agassiz, 1860 accepted as Beroe Gronov, 1760 · Animalia (Kingdom) > Ctenophora (Phylum) > Nuda (Class) > Beroida (Order) > Beroidae (Family)

Ierax
     Ierax Leach, 1816 accepted as Ierax Leach, 1816 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Accipitriformes (Order) > Falconidae (Family)
     Ierax Forster, 1817 accepted as Ierax Forster, 1817 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Accipitriformes (Order) > Falconidae (Family)

Ifasina
     Ifasina Jeannel, 1946 accepted as Ifasina Jeannel, 1946 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Ifasina Rivalier, 1961 accepted as Cylindera Westwood, 1831 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Iforasia
     Iforasia Fischer, 1962 † accepted as Iforasia Fischer, 1962 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Gastropoda (awaiting allocation) (Order) > Gastropoda (awaiting allocation) (Family)
     Iforasia Fischer, 1963 † accepted as Iforasia Fischer, 1963 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Gastropoda (awaiting allocation) (Order) > Gastropoda (awaiting allocation) (Family)

Ignambia
     Ignambia Heller in Sarasin & Roux, 1916 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
     Ignambia Cheesman, 1953 accepted as Ignambia Cheesman, 1953 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Iguana
     Iguana Laurenti, 1768 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Iguanidae (Family)
 Iguana Gronovius, 1763 accepted as Iguana Laurenti, 1768 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Iguanidae (Family)

Iguanosaurus
     Iguanosaurus Ritgen, 1828 † accepted as Iguanosaurus Ritgen, 1828 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
     Iguanosaurus Kuhn, 1944 † accepted as Iguanosaurus Kuhn, 1944 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Sauria (awaiting allocation) (Family)

Iheringia
 Iheringia Cossmann, 1899 † accepted as Iheringia Cossmann, 1899 † (Unjustified (?) emendation) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Lahilliidae (Family)
 Iheringia Keyserling, 1891 accepted as Otiothops MacLeay, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Palpimanidae (Family)
 Iheringia Lahille, 1898 † accepted as Iheringiella Berg, 1898 † (junior homonym of Iheringia Keyserling, 1891 (Arachnida: Palpimandae)) · Animalia (Kingdom) > Echinodermata (Phylum) > Echinoidea (Class) > Clypeasteroida (Order) > Iheringiellidae (Family)
 Iheringia Jones, 1914 accepted as Lophomyra Schaus, 1911 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Ihlea
     Ihlea Metcalf, 1919 · Animalia (Kingdom) > Chordata (Phylum) > Thaliacea (Class) > Salpida (Order) > Salpidae (Family)
     Ihlea Metcalf, 1918 accepted as Ihlea Metcalf, 1918 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Thaliacea (Class) > Salpida (Order) > Salpidae (Family)
 Ihlea Travassos & Vogelsang, 1932 accepted as Oesophagostomum Molin, 1861 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Rhabditida (Order) > Chabertiidae (Family)

Ijimaia
     Ijimaia Gordon & d'Hondt, 1997 accepted as Ijimaia Gordon & d'Hondt, 1997 (unassessed) · Animalia (Kingdom) > Bryozoa (Phylum) > Bryozoa (awaiting allocation) (Class) > Bryozoa (awaiting allocation) (Order) > Bryozoa (awaiting allocation) (Family)
     Ijimaia Sauter, 1905 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Ateleopodiformes (Order) > Ateleopodidae (Family)

Ikonnikovia
     Ikonnikovia I.A. Linczevski in B.K. Schischkin & E.G. Bobrov, 1952 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Plumbaginaceae (Family)
     Ikonnikovia Beï-Bienko, 1935 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Ilaenchus
 Ilaenchus Lučnik, 1933 accepted as Chlaenius Bonelli, 1810 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Ilaenchus Basilewsky & Grundmann, 1954 accepted as Chlaenius Bonelli, 1810 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Ilarches
     Ilarches Meyrick, 1933 accepted as Ilarches Meyrick, 1933 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Ilarches Cantor, 1849 accepted as Ephippus Cuvier, 1816 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Ephippidae (Family)

Ilea
 Ilea E.M. Fries, 1825 accepted as · Plantae (Kingdom) > Chlorophyta (Phylum) > Ulvophyceae (Class) > Ulvales (Order) > Ulvaceae (Family)
 Ilea E.M. Fries, 1835 accepted as Petalonia Derbès & Solier, 1850 (synonym) · Chromista (Kingdom) > Ochrophyta (Phylum) > Phaeophyceae (Class) > Scytosiphonales (Order) > Scytosiphonaceae (Family)
 Ilea J.Agardh, 1883 accepted as Capsosiphon Gobi, 1879 (synonym) · Plantae (Kingdom) > Chlorophyta (Phylum) > Ulvophyceae (Class) > Ulvales (Order) > Capsosiphonaceae (Family)

Ilema
     Ilema Moore, 1858 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lymantriidae (Family)
 Ilema Hampson, 1900 accepted as Ilema Hampson, 1900 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Arctiidae (Family)

Ilerda
     Ilerda Doubleday, 1847 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lycaenidae (Family)
     Ilerda Stål, 1864 accepted as Ilerda Stål, 1864 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Tropiduchidae (Family)

Ilerdaesaurus
     Ilerdaesaurus Hoffstetter, 1966 † accepted as Ilerdaesaurus Hoffstetter, 1966 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Sauria (awaiting allocation) (Family)
     Ilerdaesaurus Hoffstetter, 1965 † accepted as Ilerdaesaurus Hoffstetter, 1965 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Sauria (awaiting allocation) (Family)

Iletica
 Iletica Gemminger & Harold, 1870 accepted as Eletica Dejean, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Meloidae (Family)
 Iletica Agassiz, 1846 accepted as Eletica Dejean, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Meloidae (Family)

Ilex
 Ilex P. Miller, 1754 accepted as Quercus Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fagales (Order) > Fagaceae (Family)
     Ilex Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Aquifoliales (Order) > Aquifoliaceae (Family)

Ilia
     Ilia Leach, 1817 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Leucosiidae (Family)
     Ilia Baranov, 1938 accepted as Ilia Baranov, 1938 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
 Ilia Hartman, 1881 accepted as Ilia Hartman, 1881 · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Iliella
     Iliella Tchernyshev, 1940 † · Animalia (Kingdom) > Arthropoda (Phylum) > Branchiopoda (Class) > Kazacharthra (Order) > Ketmeniidae (Family)
     Iliella Rukavishnikova in Nikitin, Popov & Rukavishnikova, 1980 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Spiriferida (Order) > Cyrtiidae (Family)
     Iliella Bacescu, 1968 † accepted as Iliella Bacescu, 1968 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Malacostraca (awaiting allocation) (Order) > Malacostraca (awaiting allocation) (Family)

Iliolopha
     Iliolopha Bonaparte, 1854 accepted as Iliolopha Bonaparte, 1854 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Iliolopha Sclater, 1856 accepted as Iliolopha Sclater, 1856 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Ilione
     Ilione Haliday in Curtis, 1837 accepted as Ilione Haliday in Curtis, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Sciomyzidae (Family)
 Ilione Hendel, 1901 accepted as Ilione Haliday in Curtis, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Sciomyzidae (Family)

Ilisha
     Ilisha Richardson, 1846 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Clupeiformes (Order) > Pristigasteridae (Family)
     Ilisha Southwell & Prashad, 1918 accepted as Ilisha Southwell & Prashad, 1918 (unassessed) · Animalia (Kingdom) > Platyhelminthes (Phylum) > Cestoda (Class) > Cestoda (awaiting allocation) (Order) > Cestoda (awaiting allocation) (Family)

Ilisia
 Ilisia Fitzinger, 1826 accepted as Ilisia Fitzinger, 1826 (Misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Aniliidae (Family)
     Ilisia Rondani, 1856 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Limoniidae (Family)

Iliusa
 Iliusa Mulsant & Rey, 1874 accepted as Myrmecopora Saulcy, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Iliusa Mulsant & Rey, 1873 accepted as Myrmecopora Saulcy, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Iljinia
     Iljinia Korovin ex M.M. Iljin in B.K. Schischkin, 1936 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Amaranthaceae (Family)
 Iljinia de Buen, 1930 accepted as Pomatoschistus Gill, 1863 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Gobiidae (Family)

Illa
     Illa Adanson, 1763 accepted as Illa Adanson, 1763 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Verbenaceae (Family)
     Illa Warren, 1914 accepted as Illa Warren, 1914 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
 Illa Baranov, 1938 accepted as Solomonilla Özdikmen, 2007 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)

Illecebrum
     Illecebrum Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Caryophyllaceae (Family)
 Illecebrum K.P.J. Sprengel, 1817 accepted as Alternanthera Forsskål, 1775 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Amaranthaceae (Family)

Illidgea
     Illidgea Turner, 1897 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Oecophoridae (Family)
 Illidgea Lea, 1912 accepted as Acidinus Zimmerman, 1994 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Illiesiella
     Illiesiella Besch, 1964 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Sperchontidae (Family)
     Illiesiella Wagner, 1985 accepted as Illiesiella Wagner, 1985 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Empididae (Family)

Illigera
     Illigera Meigen, 1838 accepted as Illigera Meigen, 1838 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
     Illigera Blume, 1826 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Laurales (Order) > Hernandiaceae (Family)

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

Ilyanthus
     Ilyanthus Dana, 1846 · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Actiniaria (Order) > Aiptasiidae (Family)
     Ilyanthus Forbes, 1840 · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Actiniaria (Order) > Haloclavidae (Family)

Ilyobates
 Ilyobates Sars, 1866 accepted as Krithe Brady, Crosskey & Robertson, 1874 · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Podocopida (Order) > Krithidae (Family)
     Ilyobates Kraatz, 1856 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Ilyobius
     Ilyobius Enderlein, 1910 accepted as Ilyobius Enderlein, 1910 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Neuroptera (Order) > Neuroptera (awaiting allocation) (Family)
 Ilyobius Gemminger & Harold, 1868 accepted as Ilybius Erichson, 1832 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dytiscidae (Family)
 Ilyobius Agassiz, 1846 accepted as Ilybius Erichson, 1832 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dytiscidae (Family)

Ilyodrilus
     Ilyodrilus Štolc, 1888 accepted as Ilyodrilus Štolc, 1888 (unassessed) · Animalia (Kingdom) > Annelida (Phylum) > Oligochaeta (Class) > Oligochaeta (awaiting allocation) (Order) > Oligochaeta (awaiting allocation) (Family)
     Ilyodrilus Eisen, 1879 · Animalia (Kingdom) > Annelida (Phylum) > Oligochaeta (Class) > Haplotaxida (Order) > Naididae (Family)

Ilythea
     Ilythea Haliday, 1839 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Ephydridae (Family)
     Ilythea Curtis, 1837 accepted as Ilythea Haliday, 1839 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Ephydridae (Family)

Imania
     Imania V.A. Krassilov & S.A. Schorochova in E.V. Krasnov, 1970 † accepted as Imania V.A. Krassilov & S.A. Schorochova in E.V. Krasnov, 1970 † (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Pteridospermopsida (Class) > Pteridospermopsida (awaiting allocation) (Order) > Pteridospermopsida (awaiting allocation) (Family)
     Imania Martynov, 1935 accepted as Imania Martynov, 1935 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Trichoptera (Order) > Apataniidae (Family)

Imantocera
     Imantocera Dejean, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Imantocera Thomson, 1857 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Imantophyllum
     Imantophyllum W.J. Hooker, 1854 accepted as Imantophyllum W.J. Hooker, 1854 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Amaryllidaceae (Family)
 Imantophyllum W.J. Hooker, 1828 accepted as Imatophyllum W.J. Hooker, 1828 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Amaryllidaceae (Family)

Imatidium
     Imatidium Fabricius, 1801 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
 Imatidium Aslam, 1965 accepted as Aslamidium Borowiec, 1984 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Imbricaria
     Imbricaria Schumacher, 1817 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Mitridae (Family)
 Imbricaria (J.C.D. Schreber) A. Michaux, 1803 accepted as Anaptychia Körber, 1848 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Teloschistales (Order) > Physciaceae (Family)
 Imbricaria J.E. Smith, 1797 accepted as Baeckea Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Myrtaceae (Family)
 Imbricaria Commerson ex A.L. Jussieu, 1789 accepted as Mimusops Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Sapotaceae (Family)

Imbricatospira
     Imbricatospira Fu, 1982 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Atrypida (Order) > Atrypidae (Family)
     Imbricatospira Fu Lipu, 1985 † accepted as Imbricatospira Fu Lipu, 1985 † (unassessed) · Animalia (Kingdom) > Brachiopoda (Phylum) > Brachiopoda (awaiting allocation) (Class) > Brachiopoda (awaiting allocation) (Order) > Brachiopoda (awaiting allocation) (Family)

Imbrius
     Imbrius Stål, 1874 accepted as Imbrius Stål, 1874 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Imbrius Pascoe, 1866 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Imelda
     Imelda Dellacasa, Gordon & Dellacasa, 2002 accepted as Imelda Dellacasa, Gordon & Dellacasa, 2002 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
     Imelda Hewitson, 1870 accepted as Imelda Hewitson, 1870 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Riodinidae (Family)

Imeria
     Imeria Cameron, 1903 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Ichneumonidae (Family)
     Imeria R.M. King & H.E. Robinson, 1975 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Imerina
     Imerina Ragonot, 1891 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Pyralidae (Family)
     Imerina Lehrer, 2003 accepted as Imerina Lehrer, 2003 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Sarcophagidae (Family)
 Imerina Raffray, 1897 accepted as Merinia Newton & Chandler, 1989 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Imhofia
 Imhofia Heister, 1755 accepted as Nerine Herbert, 1820 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Amaryllidaceae (Family)
 Imhofia Herbert, 1821 accepted as Hessea W. Herbert, 1837 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Amaryllidaceae (Family)

Imisia
 Imisia Renier, 1804 accepted as Imisia Renier, 1804 (Published in a rejected work (ICZN)) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Galeommatidae (Family)
 Imisia Brusina, 1870 accepted as Galeomma Turton, 1825 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Galeommatidae (Family)

Imitatrix
     Imitatrix Gurevich, 1963 † accepted as Imitatrix Gurevich, 1963 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Ostracoda (awaiting allocation) (Order) > Ostracoda (awaiting allocation) (Family)
     Imitatrix Westerlund, 1884 accepted as Imitatrix Westerlund, 1884 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Clausiliidae (Family)

Imogine
 Imogine Girard, 1853 accepted as Imogine Marcus & Marcus, 1968 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Turbellaria (Class) > Polycladida (Order) > Stylochidae (Family)
     Imogine Marcus & Marcus, 1968 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Turbellaria (Class) > Polycladida (Order) > Stylochidae (Family)

Imperata
     Imperata Cyrillo, 1792 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Poaceae (Family)
     Imperata delle Chiaje, 1841 accepted as Imperata delle Chiaje, 1841 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)

Imperatoria
     Imperatoria Parona, 1933 † · Animalia (Kingdom) > Porifera (Phylum) > Hexactinellida (Class) > Sphinctozoa (Order) > Sebargasiidae (Family)
     Imperatoria de Gregorio, 1930 † accepted as Imperatoria de Gregorio, 1930 † (unassessed) · Animalia (Kingdom) > Echinodermata (Phylum) > Echinodermata (awaiting allocation) (Class) > Echinodermata (awaiting allocation) (Order) > Echinodermata (awaiting allocation) (Family)
     Imperatoria Matthes, 1952 † accepted as Imperatoria Matthes, 1952 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Creodonta (Order) > Hyaenodontidae (Family)
 Imperatoria Linnaeus, 1753 accepted as Peucedanum Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Apiales (Order) > Apiaceae (Family)

Imperfecta
     Imperfecta Méhelÿ, 1935 accepted as Imperfecta Méhelÿ, 1935 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Imperfecta Busch, 1948 accepted as Buschiella Corliss, 1960 · Chromista (Kingdom) > Ciliophora (Phylum) > Ciliophora (awaiting allocation) (Class) > Ciliophora (awaiting allocation) (Order) > Ciliophora (awaiting allocation) (Family)

Inachus
     Inachus Hisinger, 1837 † accepted as Inachus Hisinger, 1837 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Inachus Weber, 1795 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Inachidae (Family)

Inactis
 Inactis (M. Gomont) O. Kirchner in Engler & Prantl, 1898 accepted as Schizothrix Kützing ex Gomont, 1892 · Bacteria (Kingdom) > Cyanobacteria (Phylum) > Cyanophyceae (Class) > Oscillatoriales (Order) > Oscillatoriaceae (Family)
 Inactis Thuret, 1875 accepted as Schizothrix Kützing ex Gomont, 1892 · Bacteria (Kingdom) > Cyanobacteria (Phylum) > Cyanophyceae (Class) > Synechococcales (Order) > Schizotrichaceae (Family)
 Inactis Kützing, 1843 accepted as Schizothrix Kützing ex Gomont, 1892 · Bacteria (Kingdom) > Cyanobacteria (Phylum) > Cyanophyceae (Class) > Synechococcales (Order) > Schizotrichaceae (Family)

Inapertisporites
     Inapertisporites T. van der Hammen, 1954 † accepted as Inapertisporites T. van der Hammen ex G.E. Rouse, 1959 † · Plantae (Kingdom) > Sporae dispersae (Phylum) > (Class) > (Order) > (Family)
 Inapertisporites T. van der Hammen ex G.E. Rouse, 1959 † accepted as · Plantae (Kingdom) > Sporae dispersae (Phylum) > (Class) > (Order) > (Family)

Inca
     Inca Lepeletier & Serville, 1828 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
     Inca Jardine, 1850 accepted as Inca Jardine, 1850 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Inca Warren, 1894 accepted as Inca Warren, 1894 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Inca Taczanowski, 1879 accepted as Aspidolasius Simon, 1888 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Araneidae (Family)
 Inca Klapálek, 1914 accepted as Inconeuria Klapálek, 1916 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Plecoptera (Order) > Perlidae (Family)
 Inca Klapálek, 1916 accepted as Inconeuria Klapálek, 1916 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Plecoptera (Order) > Perlidae (Family)

Incisocalliope
     Incisocalliope Brandt, 1959 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Pleustidae (Family)
     Incisocalliope J.L. Barnard & Reish, 1959 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Pleustidae (Family)

Incudifera
     Incudifera Fletcher, 1979 accepted as Incudifera Fletcher, 1979 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Incudifera Wehrli, 1934 accepted as Incudifera Wehrli, 1934 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Indanobium
 Indanobium Español, 1965 accepted as Ptilinomorphus Español, 1965 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ptinidae (Family)
 Indanobium Español, 1970 accepted as Ptilinomorphus Español, 1965 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ptinidae (Family)

Indiana
 Indiana Matthew, 1902 † accepted as Indianites Ulrich & Bassler, 1931 † · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Archaeocopida (Order) > Indianidae (Family)
 Indiana Tutt, 1903 accepted as Indiana Tutt, 1903 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Indiana Chakravatz, 1943 accepted as Indiana Chakravatz, 1943 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Spirurida (Order) > Travassosinematidae (Family)

Indiaster
     Indiaster Raghavendra Rao, 1957 † accepted as Indiaster Raghavendra Rao, 1957 † (unassessed) · Animalia (Kingdom) > Echinodermata (Phylum) > Asteroidea (Class) > Asteroidea (awaiting allocation) (Order) > Asteroidea (awaiting allocation) (Family)
 Indiaster Lambert, 1920 accepted as Brisaster Gray, 1855 (subjective junior synonym) · Animalia (Kingdom) > Echinodermata (Phylum) > Echinoidea (Class) > Spatangoida (Order) > Schizasteridae (Family)

Indicator
     Indicator Stephens in Shaw, 1815 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Piciformes (Order) > Indicatoridae (Family)
     Indicator Vieillot, 1816 accepted as Indicator Vieillot, 1816 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Indiella
     Indiella Sautya, Tabachnick & Ingole, 2011 · Animalia (Kingdom) > Porifera (Phylum) > Hexactinellida (Class) > Hexactinosida (Order) > Aulocalycidae (Family)
 Indiella Brumpt, 1906 accepted as Madurella M.E. Brumpt, 1905 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Sordariales (Order) > Sordariales incertae sedis (Family)
 Indiella Blattný, 1925 accepted as Sognorus Reitter, 1881 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Indiochaitophorus
     Indiochaitophorus Verma, 1969 accepted as Indiochaitophorus Verma, 1969 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Indiochaitophorus Verma & Das in Verma & Das, 1992 accepted as Indiochaitophorus Verma & Das in Verma & Das, 1992 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Aphididae (Family)

Indirana
     Indirana Bauer, 1985 · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Anura (Order) > Ranidae (Family)
     Indirana Laurent, 1986 · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Anura (Order) > Ranidae (Family)

Indoceras
     Indoceras Noetling, 1897 † · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Ammonitida (Order) > Sphenodiscidae (Family)
 Indoceras Schlüter, 1928 † accepted as Idoceras Burckhardt, 1906 † · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Ammonitida (Order) > Perisphinctidae (Family)

Indoleon
     Indoleon Banks, 1913 accepted as Indoleon Banks, 1913 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Neuroptera (Order) > Neuroptera (awaiting allocation) (Family)
     Indoleon Fraser, 1952 accepted as Indoleon Fraser, 1952 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Neuroptera (Order) > Neuroptera (awaiting allocation) (Family)

Indoquedius
     Indoquedius Blackwelder, 1952 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Indoquedius Cameron, 1932 accepted as Indoquedius Blackwelder, 1952 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Indoseius
 Indoseius Evans, 1955 accepted as Neocypholaelaps Vitzthum, 1943 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Ameroseiidae (Family)
 Indoseius Ghai & Menon, 1970 accepted as Indoseiulus Ehara, 1982 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Phytoseiidae (Family)

Indosinia
     Indosinia Cossmann, 1920 † accepted as Indosinia Cossmann, 1920 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Coenogastropoda incertae sedis (Order) > Acteoninidae (Family)
     Indosinia J.E. Vidal, 1965 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Ochnaceae (Family)

Indosphaera
     Indosphaera A. Kumar, 1986 † · Chromista (Kingdom) > Miozoa (Phylum) > Dinophyceae (Class) > Peridiniales (Order) > Peridiniaceae (Family)
     Indosphaera Attems, 1936 accepted as Indosphaera Attems, 1936 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Myriapoda (awaiting allocation) (Class) > Myriapoda (awaiting allocation) (Order) > Myriapoda (awaiting allocation) (Family)
     Indosphaera Attems, 1935 accepted as Indosphaera Attems, 1935 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Myriapoda (awaiting allocation) (Class) > Myriapoda (awaiting allocation) (Order) > Myriapoda (awaiting allocation) (Family)
 Indosphaera Jankowski, 1985 accepted as Epistylis Ehrenberg, 1830 (junior homonym and synonym) · Chromista (Kingdom) > Ciliophora (Phylum) > Oligohymenophorea (Class) > Peritrichida (Order) > Epistylididae (Family)

Indosyrphus
     Indosyrphus Kohli, Kapoor & Gupta, 1988 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)
     Indosyrphus Kohli, 1987 accepted as Indosyrphus Kohli, 1987 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)

Indotheca
     Indotheca R.V. Sitholey in B. Sahni & R.V. Sitholey, 1943 † accepted as Indotheca R.V. Sitholey in B. Sahni & R.V. Sitholey, 1943 † (unassessed) · Plantae (Kingdom) > Plantae (awaiting allocation) (Phylum) > Plantae (awaiting allocation) (Class) > Plantae (awaiting allocation) (Order) > Plantae (awaiting allocation) (Family)
 Indotheca Stach, 1956 accepted as Sphaeridia Linnaniemi, 1912 · Animalia (Kingdom) > Arthropoda (Phylum) > Collembola (Class) > Symphypleona (Order) > Sminthurididae (Family)

Indotherium
     Indotherium Yadagiri, 1984 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Multituberculata (Order) > Woutersiidae (Family)
 Indotherium Kretzoi, 1942 † accepted as Brachypotherium Roger, 1904 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Perissodactyla (Order) > Rhinocerotidae (Family)

Indris
 Indris Cuvier, 1800 accepted as Indri Geoffroy, 1796 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Indriidae (Family)
 Indris Ashmead, 1887 accepted as Idris Förster, 1856 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Scelionidae (Family)

Indumasonaphis
     Indumasonaphis accepted as Indumasonaphis (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Indumasonaphis Ghosh, Basu & Raychaudhuri, 1977 † accepted as Indumasonaphis Ghosh, Basu & Raychaudhuri, 1977 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Aphididae (Family)

Indusa
 Indusa Handlirsch, 1907 † accepted as Indusa Handlirsch, 1907 † (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Trichoptera (Order) > Trichoptera (awaiting allocation) (Family)
 Indusa Richardson, 1905 accepted as Ichthyoxenus auctt. · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Cymothoidae (Family)

Indusius
     Indusius Gunnell, Gingerich, Ul-Haq, Bloch, Khan & Clyde, 2008 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Anaptomorphidae (Family)
     Indusius Barraud, 1934 accepted as Indusius Barraud, 1934 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Culicidae (Family)

Inella
     Inella Bayle, 1879 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Ptenoglossa (Order) > Triphoridae (Family)
     Inella Repina in Repina et al., 1964 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Redlichiida (Order) > Neoredlichiidae (Family)

Inermia
     Inermia Korobkov, 1955 † accepted as Inermia Korobkov, 1955 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Inermia Poey, 1860 accepted as Haemulon Cuvier, 1829 (synonym) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Haemulidae (Family)

Inermodorus
 Inermodorus Gaud & Mouchet, 1959 accepted as Inermodorsus Gaud & Mouchet, 1959 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Astigmata (Order) > Syringobiidae (Family)
 Inermodorus Zoological Record, 1961 accepted as Inermodorsus Gaud & Mouchet, 1959 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Astigmata (Order) > Syringobiidae (Family)

Inezia
     Inezia Cherrie, 1909 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Tyrannidae (Family)
     Inezia E.P. Phillips, 1932 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Inezia Roewer, 1913 accepted as Santinezia Roewer, 1923 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Opiliones (Order) > Cranaidae (Family)

Inferiolabiata
     Inferiolabiata Broch, 1951 · Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Anthoathecata (Order) > Stylasteridae (Family)
 Inferiolabiata Cairns, 1983 accepted as Inferiolabiata Broch, 1951 · Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Anthoathecata (Order) > Stylasteridae (Family)

Inflatulum
     Inflatulum Carpenter, 1857 accepted as Inflatulum Carpenter, 1857 · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Inflatulum Carpenter, 1858 accepted as Inflatulum Carpenter, 1858 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Infundibulum
     Infundibulum Sowerby, 1815 accepted as Infundibulum Sowerby, 1815 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Infundibulum Montfort, 1810 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Vetigastropoda (Order) > Trochidae (Family)
 Infundibulum Velenovský, 1934 accepted as Peziza Dillenius ex E.M. Fries, 1822 · Fungi (Kingdom) > Ascomycota (Phylum) > Pezizomycetes (Class) > Pezizales (Order) > Pezizaceae (Family)

Inga
     Inga Busck, 1908 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Oecophoridae (Family)
     Inga P. Miller, 1754 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)

Ingenhoussia
 Ingenhoussia Dennstedt, 1818 accepted as Ingenhoussia Dennstedt, 1818 (Not validly published) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Vitales (Order) > Vitaceae (Family)
     Ingenhoussia E.H.F. Meyer, 1836 accepted as Ingenhoussia E.H.F. Meyer, 1836 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)

Ingenia
     Ingenia Gerlach, 1957 · Animalia (Kingdom) > Nematoda (Phylum) > Enoplea (Class) > Tripyloidida (Order) > Tripyloididae (Family)
     Ingenia Barsbold, 1981 † · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Saurischia (Order) > Oviraptoridae (Family)

Iniopachys
 Iniopachys Lacordaire, 1854 accepted as Carabus Linnaeus, 1758 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Iniopachys Géhin, 1885 accepted as Carabus Linnaeus, 1758 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Inistius
 Inistius accepted as Isistius Gill, 1865 (misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Chondrichthyes (Class) > Squaliformes (Order) > Dalatiidae (Family)
 Inistius accepted as Iniistius Gill, 1862 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Labridae (Family)

Inmalthodes
 Inmalthodes Wittmer, 1940 accepted as Inmalthodes Wittmer, 1940 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Inmalthodes Pic, 1938 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cantharidae (Family)

Ino
     Ino Leach in Samouelle, 1819 accepted as Ino Leach in Samouelle, 1819 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Ino Schrank, 1803 accepted as Ino Schrank, 1803 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Crustacea (awaiting allocation) (Class) > Crustacea (awaiting allocation) (Order) > Crustacea (awaiting allocation) (Family)
     Ino Koch, 1850 accepted as Ino Koch, 1850 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Arachnida (awaiting allocation) (Order) > Arachnida (awaiting allocation) (Family)
 Ino Hinds, 1843 accepted as Inella Bayle, 1879 (invalid: junior homonym of Ino Schrank, 1803 [Crustacea]; Inella is a replacement name) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Ptenoglossa (Order) > Triphoridae (Family)
 Ino Laporte, 1835 accepted as Inopeplus Smith, 1851 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Salpingidae (Family)

Inoceramus
     Inoceramus J. Sowerby, 1814 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pterioida (Order) > Inoceramidae (Family)
 Inoceramus Parkinson, 1819 † accepted as Inoceramus J. Sowerby, 1814 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pterioida (Order) > Inoceramidae (Family)

Inoderma
     Inoderma Kützing, 1833 · Plantae (Kingdom) > Chlorophyta (Phylum) > Chlorophyceae (Class) > Tetrasporales (Order) > Palmellaceae (Family)
 Inoderma M.J. Berkeley, 1881 accepted as Mesophellia M.J. Berkeley, 1857 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Hysterangiales (Order) > Mesophelliaceae (Family)
 Inoderma P.A. Karsten, 1879 accepted as Inonotus P.A. Karsten, 1879 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Hymenochaetales (Order) > Hymenochaetaceae (Family)
 Inoderma (Acharius) S.F. Gray, 1821 accepted as Thrombium Wallroth, 1831 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Dothideomycetes incertae sedis (Order) > Thrombiaceae (Family)

Inodes
 Inodes O.F. Cook, 1901 accepted as Sabal Adanson, 1763 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Arecales (Order) > Arecaceae (Family)
 Inodes de Laubenfels, 1957 accepted as Hyrtios Duchassaing & Michelotti, 1864 (junior synonym) · Animalia (Kingdom) > Porifera (Phylum) > Demospongea (Class) > Dictyoceratida (Order) > Thorectidae (Family)

Inosomus
     Inosomus Broun, 1882 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Inosomus Hutton, 1904 accepted as Inosomus Broun, 1882 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Insidiator
 Insidiator Amyot, 1846 accepted as Insidiator Amyot, 1846 (Published in a rejected work (ICZN)) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Insidiator Jordan & Snyder, 1900 accepted as Suggrundus Whitley, 1930 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Scorpaeniformes (Order) > Platycephalidae (Family)

Insignia
     Insignia Astrova, 1965 † · Animalia (Kingdom) > Bryozoa (Phylum) > Stenolaemata (Class) > Cryptostomata (Order) > Cryptostomata (awaiting allocation) (Family)
     Insignia Angelov, 1972 accepted as Insignia Angelov, 1972 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Hydrobiidae (Family)

Insula
     Insula Kunkel, 1910 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Hyalidae (Family)
     Insula Zhou & Li, 2013 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Salticidae (Family)

Insulahypnus
     Insulahypnus Stibick, 1976 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)
     Insulahypnus Stibick, 1979 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)

Insulanus
     Insulanus Fleutiaux, 1930 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Eucnemidae (Family)
     Insulanus Linnavuori, 1960 accepted as Insulanus Linnavuori, 1960 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Insulanus Sublette, 1967 † accepted as Xestochironomus Sublette & Wirth, 1972 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Chironomidae (Family)

Insulodrilus
     Insulodrilus Brinkhurst, 1991 · Animalia (Kingdom) > Annelida (Phylum) > Oligochaeta (Class) > Haplotaxida (Order) > Phreodrilidae (Family)
     Insulodrilus Brinkhurst, 1966 accepted as Insulodrilus Brinkhurst, 1966 (unassessed) · Animalia (Kingdom) > Annelida (Phylum) > Oligochaeta (Class) > Oligochaeta (awaiting allocation) (Order) > Oligochaeta (awaiting allocation) (Family)

Integraster
 Integraster Lambert & Thiéry, 1924 accepted as Holanthus Lambert & Thiéry, 1924 · Animalia (Kingdom) > Echinodermata (Phylum) > Echinoidea (Class) > Spatangoida (Order) > Hemiasteridae (Family)
 Integraster Döderlein, 1920 accepted as Luidia Forbes, 1839 (synonym (formerly subgenus of Luidia)) · Animalia (Kingdom) > Echinodermata (Phylum) > Asteroidea (Class) > Platyasterida (Order) > Luidiidae (Family)

Intermedia
 Intermedia Caziot, 1910 accepted as Intermedia Caziot, 1910 (Misspelling) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Intermedia Chao, 1992 accepted as Sphenometopa Townsend, 1908 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Sarcophagidae (Family)

Intermediana
     Intermediana Germain, 1903 accepted as Intermediana Germain, 1903 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Intermediana Locard, 1890 accepted as Intermediana Locard, 1890 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Intermediopsyllus
     Intermediopsyllus Kunz, 1962 accepted as Scottopsyllus Apostolov & Marinov, 1988 · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Harpacticoida (Order) > Paramesochridae (Family)
 Intermediopsyllus Huys, 2009 accepted as Scottopsyllus Apostolov & Marinov, 1988 · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Harpacticoida (Order) > Paramesochridae (Family)

Inti
     Inti M.A. Blanco, 2007 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)
     Inti Hansson, 2010 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Eulophidae (Family)

Intrasporeocoelia
     Intrasporeocoelia Fan & Zhang, 1985 † · Animalia (Kingdom) > Porifera (Phylum) > Calcarea (Class) > Permosphincta (Order) > Permosphincta (awaiting allocation) (Family)
     Intrasporeocoelia Fan Jiasong & Zhang Wei, 1986 † accepted as Intrasporeocoelia Fan Jiasong & Zhang Wei, 1986 † (unassessed) · Animalia (Kingdom) > Porifera (Phylum) > Calcarea (Class) > Calcarea (awaiting allocation) (Order) > Calcarea (awaiting allocation) (Family)

Intybellia
     Intybellia Cassini, 1821 accepted as Intybellia Cassini, 1821 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Intybellia A. Monnier, 1829 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Intybus
 Intybus E.M. Fries, 1828 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
     Intybus Zinn, 1757 accepted as Intybus Zinn, 1757 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Investigator
     Investigator Stewart, 1909 · Animalia (Kingdom) > Priapula (Phylum) > Priapula (awaiting allocation) (Class) > Priapulida incertae sedis (Order) > Priapulida incertae sedis (Family)
 Investigator Goode in Goode & Bean, 1896 accepted as Nemichthys Richardson, 1848 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Anguilliformes (Order) > Nemichthyidae (Family)

Io
     Io Lea, 1831 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Sorbeoconcha (Order) > Pleuroceridae (Family)
     Io B. Nordenstam, 2003 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Io Blanchard in Gay, 1852 accepted as Adetomeris Michener, 1949 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Saturniidae (Family)

Ioanella
     Ioanella B. Granier & P.Y. Berthou in I.I. Bucur & S. Filipescu, 2002 † accepted as Ioanella B. Granier & P.Y. Berthou in I.I. Bucur & S. Filipescu, 2002 † (unassessed) · Plantae (Kingdom) > Chlorophyta (Phylum) > Ulvophyceae (Class) > Dasycladales (Order) > Dasycladales (awaiting allocation) (Family)
     Ioanella Saidova, 1975 · Chromista (Kingdom) > Retaria (Phylum) > Globothalamea (Class) > Rotaliida (Order) > Eponididae (Family)

Iodes
     Iodes Blume, 1825 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Icacinales (Order) > Icacinaceae (Family)
     Iodes Gray, 1847 accepted as Iodes Gray, 1847 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Iodes Leach, 1847 accepted as Iodes Leach, 1847 · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Iodes Mörch, 1860 accepted as Janthina Röding, 1798 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Ptenoglossa (Order) > Janthinidae (Family)

Iodina
 Iodina Mörch, 1860 accepted as Janthina Röding, 1798 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Ptenoglossa (Order) > Janthinidae (Family)
 Iodina Miers, 1851 accepted as Jodina W.J. Hooker & Arnott ex C.F. Meisner, 1837 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Santalales (Order) > Santalaceae (Family)

Iole
     Iole Blyth, 1844 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Pycnonotidae (Family)
 Iole A. Adams, 1860 † accepted as Iolaea A. Adams, 1867 (Invalid: junior homonym of Iole Blyth, 1844; Iolaea and Iolina are replacement names) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Heterostropha (Order) > Pyramidellidae (Family)
 Iole Richardson, 1905 accepted as Tole Ortmann, 1901 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Janiridae (Family)
 Iole Pascoe, 1858 accepted as Serixia Pascoe, 1856 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Iolina
     Iolina Pritchard, 1956 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Iolinidae (Family)
 Iolina Baily, 1948 † accepted as Iolaea A. Adams, 1867 (Invalid: unnecessary replacement name for Iolaea, by Baily treated as a junior homonym of Iolea Pascoe, 1858) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Heterostropha (Order) > Pyramidellidae (Family)

Ione
 Ione Lindley, 1853 accepted as Sunipia J. Lindley, 1826 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)
     Ione Latreille, 1818 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Ionidae (Family)

Ionia
     Ionia Perestenko, 1996 · Plantae (Kingdom) > Rhodophyta (Phylum) > Rhodophyta incertae sedis (Class) > Cryptonemiales (Order) > Kallymeniaceae (Family)
     Ionia Ball, 1933 accepted as Ionia Ball, 1933 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Ionopsis
 Ionopsis Lutz, 1909 accepted as Ionopsis Lutz, 1909 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tabanidae (Family)
     Ionopsis Kunth in Humboldt, Bonpland & Kunth, 1816 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)

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

Iophon
     Iophon Gray, 1867 · Animalia (Kingdom) > Porifera (Phylum) > Demospongea (Class) > Poecilosclerida (Order) > Acarnidae (Family)
 Iophon Champion, 1895 accepted as Jophon Champion, 1895 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Iospilus
     Iospilus Viguier, 1886 · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Phyllodocida (Order) > Iospilidae (Family)
 Iospilus Augener, 1922 accepted as Iospilus Viguier, 1886 · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Phyllodocida (Order) > Iospilidae (Family)

Iota
     Iota Saussure, 1854 accepted as Iota Saussure, 1854 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Iota Cobb, 1913 accepted as Hemicriconemoides Chitwood & Birchfield, 1957 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Panagrolaimida (Order) > Criconematidae (Family)

Iotaraia
     Iotaraia Jordan, 1925 accepted as Iotaraia Jordan, 1925 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
 Iotaraia Leigh-Sharpe, 1924 accepted as Raja Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Chondrichthyes (Class) > Rajiformes (Order) > Rajidae (Family)

Iotomia
 Iotomia Casey, 1922 accepted as Coelonertus Solari, 1906 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Iotomia Lioy, 1863 accepted as Potamia Robineau-Desvoidy, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Muscidae (Family)

Iotonchus
     Iotonchus Cobb, 1916 · Animalia (Kingdom) > Nematoda (Phylum) > Dorylaimea (Class) > Mononchida (Order) > Mononchidae (Family)
     Iotonchus Andrássy, 1958 · Animalia (Kingdom) > Nematoda (Phylum) > Dorylaimea (Class) > Mononchida (Order) > Mononchidae (Family)

Iouea
 Iouea sensu Lévi & Lévi, 1988 accepted as Neoschrammeniella Pisera & Lévi in Hooper & Van Soest, 2002 (misidentification) · Animalia (Kingdom) > Porifera (Phylum) > Demospongea (Class) > Lithistida (Order) > Corallistidae (Family)
 Iouea de Laubenfels in Moore, 1955 accepted as Schrammeniella Briestroffer, 1949 † · Animalia (Kingdom) > Porifera (Phylum) > Demospongea (Class) > Lithistida (Order) > Corallistidae (Family)

Ipana
     Ipana Walker, 1858 accepted as Ipana Walker, 1858 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
 Ipana Jordan, 1896 accepted as Ipanica Hampson, 1910 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Iphiclus
     Iphiclus Chevrolat, 1840 accepted as Iphiclus Chevrolat, 1840 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Iphiclus Dejean, 1835 accepted as Iphiclus Dejean, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)

Iphiculus
     Iphiculus Adams & White, 1849 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Iphiculidae (Family)
     Iphiculus White, 1847 accepted as Iphiculus Adams & White, 1849 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Iphiculidae (Family)

Iphidea
 Iphidea Billings, 1872 † accepted as Paterina Beecher, 1891 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Paterinata (Class) > Paterinida (Order) > Paterinidae (Family)
 Iphidea Baly, 1865 accepted as Atrachya Dejean, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Iphidella
 Iphidella Walcott, 1912 † accepted as Dictyonina Cooper, 1942 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Paterinata (Class) > Paterinida (Order) > Paterinidae (Family)
 Iphidella Walcott, 1905 † accepted as Paterina Beecher, 1891 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Paterinata (Class) > Paterinida (Order) > Paterinidae (Family)

Iphidulus
     Iphidulus Berlese, 1887 accepted as Iphidulus Berlese, 1887 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Phytoseiidae (Family)
     Iphidulus Ribaga, 1904 accepted as Iphidulus Ribaga, 1904 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Acari (awaiting allocation) (Order) > Acari (awaiting allocation) (Family)

Iphigeneia
 Iphigeneia Sars, 1896 accepted as Iphigenella G.O. Sars, 1896 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Iphigenellidae (Family)
 Iphigeneia Thomson, 1882 accepted as Iphinotus Stebbing, 1899 (homonym, Mollusca) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Phliantidae (Family)

Iphigenia
     Iphigenia Kunth, 1843 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Liliales (Order) > Colchicaceae (Family)
     Iphigenia Thomson, 1882 accepted as Iphigenia Thomson, 1882 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Crustacea (awaiting allocation) (Class) > Crustacea (awaiting allocation) (Order) > Crustacea (awaiting allocation) (Family)
     Iphigenia Schumacher, 1817 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Donacidae (Family)
 Iphigenia Gray in Turton, 1840 accepted as Iphigenia Gray in Turton, 1840 (Misspelling) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Clausiliidae (Family)
 Iphigenia O. G. Costa, 1850 accepted as Spinosipella Iredale, 1930 (Invalid: junior homonym of Iphigenia Schumacher, 1817) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Anomalodesmata (Order) > Verticordiidae (Family)

Iphimedia
     Iphimedia Rathke, 1843 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Iphimediidae (Family)
 Iphimedia Duchassaing in A. Milne-Edwards, 1866 accepted as Platyactaea Guinot, 1967 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Xanthidae (Family)

Iphimediopsis
     Iphimediopsis Della Valle, 1893 accepted as Iphimediopsis Della Valle, 1893 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Crustacea (awaiting allocation) (Class) > Crustacea (awaiting allocation) (Order) > Crustacea (awaiting allocation) (Family)
 Iphimediopsis Schellenberg, 1931 accepted as Iphimedia Rathke, 1843 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Iphimediidae (Family)

Iphinoe
     Iphinoe Spaeth, 1898 accepted as Iphinoe Spaeth, 1898 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
     Iphinoe Bate, 1856 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Cumacea (Order) > Bodotriidae (Family)
 Iphinoe Rafinesque, 1815 accepted as Uroctea Dufour, 1820 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Oecobiidae (Family)
 Iphinoe H. Adams & A. Adams, 1856 accepted as Neoiphinoe Habe, 1978 (non Rafinesque, 1815) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Capulidae (Family)
     Iphinoe V.Lamprinou & A.Pantazidou, 2011 · Bacteria (Kingdom) > Cyanobacteria (Phylum) > Cyanophyceae (Class) > Nostocales (Order) > Symphyonemataceae (Family)

Iphinoë
 Iphinoë Spaeth, 1898 accepted as Aspidimorpha Hope, 1840 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
 Iphinoë Bate, 1856 accepted as Iphinoe Bate, 1856 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Cumacea (Order) > Bodotriidae (Family)

Iphionyx
 Iphionyx Krøyer, 1845 accepted as Candacia Dana, 1846 (synonym) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Calanoida (Order) > Candaciidae (Family)
 Iphionyx Dana, 1852 accepted as Candacia Dana, 1846 · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Calanoida (Order) > Candaciidae (Family)

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

Iphis
 Iphis Meigen, 1800 accepted as Iphis Meigen, 1800 (Published in a suppressed work (ICZN)) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
 Iphis Koch, 1835 accepted as Hyletastes Gistl, 1848 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Laelapidae (Family)
 Iphis Laporte, 1836 accepted as Abiphis Fleutiaux, 1926 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)
 Iphis Koch, 1839 accepted as Eviphis Berlese, 1904 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Eviphididae (Family)
 Iphis Leach, 1817 accepted as Arcania Leach, 1817 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Leucosiidae (Family)

Iphisa
     Iphisa Rafinesque, 1815 accepted as Iphisa Rafinesque, 1815 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
     Iphisa Gray, 1852 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Gymnophthalmidae (Family)

Iphiseius
     Iphiseius Berlese, 1920 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Phytoseiidae (Family)
     Iphiseius Berlese, 1916 accepted as Iphiseius Berlese, 1920 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Phytoseiidae (Family)

Iphition
     Iphition Audouin, 1836 accepted as Iphition Audouin, 1836 (unassessed) · Animalia (Kingdom) > Porifera (Phylum) > Porifera (awaiting allocation) (Class) > Porifera (awaiting allocation) (Order) > Porifera (awaiting allocation) (Family)
 Iphition Pomel, 1872 † accepted as Iphiteon Bowerbank, 1869 · Animalia (Kingdom) > Porifera (Phylum) > Hexactinellida (Class) > Hexactinosida (Order) > Euretidae (Family)

Iphitus
     Iphitus Rafinesque, 1815 accepted as Iphitus Rafinesque, 1815 · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Iphitus Jeffreys, 1883 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Ptenoglossa (Order) > Nystiellidae (Family)

Iphius
     Iphius Dejean, 1834 accepted as Iphius Dejean, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Iphius Schönherr, 1823 accepted as Alceis Billberg, 1820 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Iphthinus
     Iphthinus Melsheimer, 1846 accepted as Iphthinus Melsheimer, 1846 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
     Iphthinus Dejean, 1834 accepted as Iphthinus Dejean, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Ipiranga
     Ipiranga Fennah, 1968 accepted as Ipiranga Fennah, 1968 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Ipiranga Muñoz-Cuevas, 1973 accepted as Uropachylus Mello-Leitão, 1922 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Opiliones (Order) > Gonyleptidae (Family)

Ipo
     Ipo Kirkaldy, 1906 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadellidae (Family)
 Ipo Persoon, 1807 accepted as Antiaris Leschenault, 1810 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Rosales (Order) > Moraceae (Family)

Ipocerus
     Ipocerus Baker, 1915 accepted as Ipocerus Baker, 1915 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Jassidae (Family)
 Ipocerus Evans, 1934 accepted as Bakeriana Evans, 1954 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadellidae (Family)

Ipoctonus
     Ipoctonus Förster, 1868 accepted as Ipoctonus Förster, 1868 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Ichneumonidae (Family)
 Ipoctonus Heine, 1860 accepted as Dendropicos Malherbe, 1849 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Piciformes (Order) > Picidae (Family)

Ips
     Ips Fabricius, 1777 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
     Ips de Geer, 1775 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Iquitosa
     Iquitosa Fennah, 1945 accepted as Iquitosa Fennah, 1945 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Derbidae (Family)
 Iquitosa Roewer, 1943 accepted as Phalangodus Gervais, 1842 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Opiliones (Order) > Cranaidae (Family)

Ira
     Ira Walker, 1866 accepted as Ira Walker, 1866 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Ira Neumoegen, 1890 accepted as Ira Neumoegen, 1890 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Syntomidae (Family)

Iracema
     Iracema Triques, 1996 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Gymnotiformes (Order) > Rhamphichthyidae (Family)
 Iracema Pérez-Miles, 2000 accepted as Maraca Pérez-Miles, 2005 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Theraphosidae (Family)

Iranella
     Iranella Uvarov, 1922 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Dericorythidae (Family)
     Iranella Hupé, 1955 † accepted as Iranella Hupé, 1955 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)
     Iranella Hupé in Piveteau, 1953 † accepted as Iranella Hupé in Piveteau, 1953 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)

Irania
     Irania Pandey & Fürsich, 2003 † accepted as Irania Pandey & Fürsich, 2003 † (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Scleractinia (Order) > Scleractinia (awaiting allocation) (Family)
     Irania de Filippi, 1862 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Muscicapidae (Family)
 Irania Douvillé in Morgan, 1904 † accepted as Morgania Cossmann, 1906 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neotaenioglossa (Order) > Neotaenioglossa (awaiting allocation) (Family)
 Irania King, 1937 † accepted as Iranoleesia King, 1955 † (junior homonym) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Ptychopariida (Order) > Asaphiscidae (Family)
 Irania E. Hadač & J. Chrtek, 1973 accepted as Fibigia Medikus, 1792 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Brassicaceae (Family)
 Irania H.-J. Schweitzer, 1977 † accepted as Schweitzeria A.B. Shipunov & D.D. Sokoloff, 2003 † (junior homonym) · Plantae (Kingdom) > Tracheophyta (Phylum) > Pinopsida (Class) > Czekanowskiales (Order) > Czekanowskiaceae (Family)

Iranites
     Iranites Teichert & Kummel in Teichert, Kummel & Sweet, 1973 † accepted as Iranites Teichert & Kummel in Teichert, Kummel & Sweet, 1973 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Ceratitida (Order) > Xenodiscidae (Family)
 Iranites Rahaghi, 1976 † accepted as Sirtina Brönnimann & Wirz, 1962 † (Opinion of Loeblich & Tappan, 1987) · Chromista (Kingdom) > Retaria (Phylum) > Globothalamea (Class) > Rotaliida (Order) > Lepidorbitoididae (Family)

Iraniulus
     Iraniulus Lohmander, 1932 accepted as Iraniulus Lohmander, 1932 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Myriapoda (awaiting allocation) (Class) > Myriapoda (awaiting allocation) (Order) > Myriapoda (awaiting allocation) (Family)
     Iraniulus Attems, 1951 accepted as Iraniulus Attems, 1951 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Myriapoda (awaiting allocation) (Class) > Myriapoda (awaiting allocation) (Order) > Myriapoda (awaiting allocation) (Family)

Irenaeus
     Irenaeus Agassiz, 1845 accepted as Irenaeus Agassiz, 1845 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Irenaeus Goodsir, 1843 accepted as Anomalocera Templeton, 1837 (synonym) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Calanoida (Order) > Pontellidae (Family)
 Irenaeus Latreille, 1829 accepted as Piestus Gravenhorst, 1806 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Irene
     Irene (Theissen & Sydow) Ciferri, 1938 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Meliolales (Order) > Meliolaceae (Family)
 Irene Boie, 1826 accepted as Irena Horsfield, 1821 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Irenidae (Family)
 Irene Theissen & P. Sydow, 1917 accepted as Asteridiella D. McAlpine, 1897 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Meliolales (Order) > Meliolaceae (Family)
 Irene Haeckel, 1879 accepted as Eirene Eschscholtz, 1829 (incorrect spelling of Eirene) · Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Leptothecata (Order) > Eirenidae (Family)

Irenea
     Irenea Donisthorpe, 1938 accepted as Irenea Donisthorpe, 1938 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Irenea D.L. Szlachetko, J. Mytnik-Ejsmont, M. Górniak & A. Romowicz, 2006 accepted as Cyrtochilum Kunth in Humboldt, Bonpland & Kunth, 1816 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)

Irenella
     Irenella Riley, 1927 accepted as Irenella Riley, 1927 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Irenella Gude, 1913 accepted as Irenella Gude, 1913 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Irenella Suessenguth, 1934 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Amaranthaceae (Family)

Irenina
     Irenina (F. Stevens) Ciferri, 1938 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Meliolales (Order) > Meliolaceae (Family)
 Irenina F.L. Stevens, 1927 accepted as Appendiculella F. von Höhnel, 1919 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Meliolales (Order) > Meliolaceae (Family)

Irenopsis
     Irenopsis F.L. Stevens, 1927 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Meliolales (Order) > Meliolaceae (Family)
     Irenopsis (F. Stevens) Ciferri, 1938 · Fungi (Kingdom) > Ascomycota (Phylum) > Dothideomycetes (Class) > Meliolales (Order) > Meliolaceae (Family)
 Irenopsis Götte, 1886 accepted as Eirene Eschscholtz, 1829 (synonym) · Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Leptothecata (Order) > Eirenidae (Family)

Iresia
     Iresia Dejean, 1831 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
     Iresia Dejean in Dejean & Boisduval, 1829 accepted as Iresia Dejean, 1831 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Iria
     Iria Stål, 1867 accepted as Iria Stål, 1867 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Iria (Persoon) Hedwig, 1806 accepted as Fimbristylis M. Vahl, 1805 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Cyperaceae (Family)

Iridea
     Iridea Swainson, 1840 accepted as Iridea Swainson, 1840 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Iridea Bory de St.-Vincent, 1826 accepted as Iridea Bory de St.-Vincent, 1826 (Misspelling) · Plantae (Kingdom) > Rhodophyta (Phylum) > Florideophyceae (Class) > Gigartinales (Order) > Gigartinaceae (Family)
 Iridea Stackhouse, 1816 accepted as Desmarestia J.V.F. Lamouroux, 1813 (synonym) · Chromista (Kingdom) > Ochrophyta (Phylum) > Phaeophyceae (Class) > Desmarestiales (Order) > Desmarestiaceae (Family)

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

Iridopsis
     Iridopsis Warren, 1894 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
 Iridopsis Aurivillius, 1899 accepted as Iridana Aurivillius in Seitz, 1920 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lycaenidae (Family)

Iridotaenia
     Iridotaenia Deyrolle, 1865 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)
 Iridotaenia Pongracz, 1935 accepted as Iridotaenia Pongracz, 1935 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)

Iris
     Iris Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Iridaceae (Family)
     Iris Saussure, 1869 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Mantodea (Order) > Mantidae (Family)
     Iris Staudinger, 1891 accepted as Iris Staudinger, 1891 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lycaenidae (Family)

Irma
 Irma Grube, 1878 accepted as Oxydromus Grube, 1855 (subjective synonym) · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Phyllodocida (Order) > Hesionidae (Family)
 Irma de Gregorio, 1930 † accepted as Leptodus Kayser in Richthofen, 1883 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Strophomenata (Class) > Productida (Order) > Lyttoniidae (Family)

Iron
     Iron P. Browne, 1756 accepted as Iron P. Browne, 1756 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Ochnaceae (Family)
     Iron Eaton, 1883 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Ephemeroptera (Order) > Heptageniidae (Family)

Irona
     Irona Mabille, 1883 accepted as Irona Mabille, 1883 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Irona Schiödte & Meinert, 1884 accepted as Mothocya Costa in Hope, 1851 (junior synonym) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Cymothoidae (Family)
 Irona Finlay, 1926 accepted as Irus F. C. Schmidt, 1818 (Invalid: junior homonym of Irona Mabille, 1883 [Gastropoda]; Notirus is a replacement name) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Veneridae (Family)

Ironella
     Ironella Krasnov & Starostina, 1970 † · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Scleractinia (Order) > Scleractinia (awaiting allocation) (Family)
     Ironella Cobb, 1920 · Animalia (Kingdom) > Nematoda (Phylum) > Enoplea (Class) > Ironida (Order) > Ironidae (Family)

Irus
     Irus F. C. Schmidt, 1818 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Veneridae (Family)
     Irus Oken, 1815 accepted as Irus Oken, 1815 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Irus Lowe, 1852 accepted as Irus Lowe, 1852 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Irvingella
     Irvingella Rusconi, 1948 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Ptychopariida (Order) > Komaspididae (Family)
     Irvingella Walcott, 1924 † accepted as Irvingella Walcott, 1924 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)
     Irvingella Van Tieghem, 1905 accepted as Irvingella Van Tieghem, 1905 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Irvingiaceae (Family)

Irvingia
     Irvingia J.D. Hooker, 1860 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Irvingiaceae (Family)
 Irvingia F. von Mueller, 1865 accepted as Polyscias J.R. Forster & J.G.A. Forster, 1775 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Apiales (Order) > Araliaceae (Family)

Irwinia
     Irwinia G.M. Barroso, 1980 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
     Irwinia Cortes, 1967 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)

Isabelia
     Isabelia Barbosa Rodrigues, 1877 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)
 Isabelia J.K. Lentin & G.L. Williams, 1975 † accepted as Isabelidinium J.K. Lentin & G.L. Williams, 1977 † · Chromista (Kingdom) > Miozoa (Phylum) > Dinophyceae (Class) > Peridiniales (Order) > Peridiniaceae (Family)

Isacantha
     Isacantha Hope, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Isacantha Simon, 1864 accepted as Isoxya Simon, 1885 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Araneidae (Family)

Isacis
 Isacis Cope, 1873 † accepted as Isacis Cope, 1873 † (Misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)
 Isacis Diesing, 1861 accepted as Pristionchus Kreis, 1932 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Diplogasterida (Order) > Diplogasteridae (Family)

Isadelphus
     Isadelphus Semenov, 1901 accepted as Isadelphus Semenov, 1901 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Chrysididae (Family)
     Isadelphus Förster, 1868 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Ichneumonidae (Family)

Isaea
     Isaea Milne Edwards, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Isaeidae (Family)
 Isaea Agassiz, 1846 accepted as Isaea Agassiz, 1846 (Unjustified (?) emendation) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Callianideidae (Family)
     Isaea Conrad, 1871 accepted as Isaea Conrad, 1871 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Isandra
     Isandra R.A. Salisbury, 1866 accepted as Isandra R.A. Salisbury, 1866 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Liliales (Order) > Liliaceae (Family)
 Isandra F. von Mueller, 1883 accepted as Symonanthus L. Haegi, 1981 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Solanales (Order) > Solanaceae (Family)

Isandria
     Isandria Heinrich, 1970 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Ichneumonidae (Family)
     Isandria Warren, 1897 accepted as Isandria Warren, 1897 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Isanthus
     Isanthus Carlgren, 1938 · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Actiniaria (Order) > Isanthidae (Family)
 Isanthus A. Michaux, 1803 accepted as Trichostema Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Lamiaceae (Family)

Isapis
     Isapis Doubleday, 1847 accepted as Isapis Doubleday, 1847 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lycaenidae (Family)
 Isapis H. Adams & A. Adams, 1854 accepted as Iselica Dall, 1918 (Invalid: junior homonym of Isapis Doubleday, 1847 [Lepidoptera]; Iselica is a replacement name) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Heterostropha (Order) > Amathinidae (Family)

Isarthron
     Isarthron Dejean, 1835 accepted as Isarthron Dejean, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Isarthron Redtenbacher, 1845 accepted as Tetropium Kirby in Richardson, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Isaster
     Isaster Desor, 1858 † · Animalia (Kingdom) > Echinodermata (Phylum) > Echinoidea (Class) > Spatangoida (Order) > Micrasteridae (Family)
 Isaster Verrill, 1894 accepted as Mediaster Stimpson, 1857 · Animalia (Kingdom) > Echinodermata (Phylum) > Asteroidea (Class) > Valvatida (Order) > Goniasteridae (Family)

Isatis
     Isatis Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Brassicaceae (Family)
     Isatis Trouessart, 1885 accepted as Isatis Trouessart, 1885 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)

Isaura
     Isaura Dana, 1848 accepted as Isaura Dana, 1848 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
     Isaura Commerson ex Poiret in Lamarck, 1813 accepted as Isaura Commerson ex Poiret in Lamarck, 1813 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Apocynaceae (Family)
 Isaura Joly, 1841 accepted as Cyzicus Audouin, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Branchiopoda (Class) > Diplostraca (Order) > Cyzicidae (Family)
 Isaura Agassiz, 1844 accepted as Isaurus Gray, 1828 · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Zoantharia (Order) > Zoanthidae (Family)

Isauria
     Isauria Ragonot, 1887 accepted as Isauria Ragonot, 1887 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Pyralidae (Family)
 Isauria Kobelt in Rossmaessler, 1901 accepted as Isaurica Kobelt in Rossmaessler, 1901 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Helicidae (Family)

Iscadida
     Iscadida Chevrolat, 1843 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
     Iscadida Dejean, 1835 accepted as Iscadida Chevrolat, 1843 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Ischiochaetus
     Ischiochaetus Bickel & Dyte, 1989 accepted as Ischiochaetus Bickel & Dyte, 1989 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Dolichopodidae (Family)
     Ischiochaetus Parent, 1933 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Dolichopodidae (Family)

Ischiopachys
     Ischiopachys Lacordaire, 1848 accepted as Ischiopachys Lacordaire, 1848 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Ischiopachys Dejean, 1835 accepted as Ischiopachys Dejean, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Ischiopachys Chevrolat, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Ischius
     Ischius Wesmael, 1837 accepted as Ischius Wesmael, 1837 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Braconidae (Family)
 Ischius Candèze, 1857 accepted as Pyrischius Hyslop, 1921 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elateridae (Family)

Ischnanthus
 Ischnanthus (Engler) Van Tieghem, 1895 accepted as Englerina Van Tieghem, 1895 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Santalales (Order) > Loranthaceae (Family)
 Ischnanthus J.J. Roemer & J.A. Schultes, 1817 accepted as Ichnanthus Palisot de Beauvois, 1812 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Poaceae (Family)

Ischnaspis
     Ischnaspis Douglas, 1887 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Diaspididae (Family)
 Ischnaspis Simon, 1892 accepted as Ischnothyreus Simon, 1893 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Oonopidae (Family)

Ischnia
     Ischnia Jordan, 1903 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Ischnia Alph. de Candolle ex Meisner, 1840 accepted as Ischnia Alph. de Candolle ex Meisner, 1840 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Verbenaceae (Family)

Ischnobrotus
     Ischnobrotus Aurivillius, 1912 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Ischnobrotus Hustache, 1936 accepted as Ischnobrotus Aurivillius, 1912 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Ischnocerus
 Ischnocerus Dejean, 1836 accepted as Meconemus Labram & Imhoff, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthribidae (Family)
 Ischnocerus Schoenherr, 1840 accepted as Aulacoderes Chevrolat, 1839 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)
 Ischnocerus Schönherr, 1839 accepted as Meconemus Labram & Imhoff, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthribidae (Family)
     Ischnocerus Dejean, 1834 accepted as Meconemus Labram & Imhoff, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthribidae (Family)

Ischnocnemis
     Ischnocnemis Thomson, 1864 accepted as Ischnocnemis Thomson, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Ischnocnemis LeConte, 1873 accepted as Sphaenothecus Dupont, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Ischnocoris
     Ischnocoris Bode, 1953 † accepted as Ischnocoris Bode, 1953 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Ischnocoris Fieber, 1860 accepted as Ischnocoris Fieber, 1860 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Ischnodactylus
     Ischnodactylus Chevrolat, 1877 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Ischnodactylus Cossmann, 1889 † accepted as Araeodactylus Harris & Burrows, 1891 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neotaenioglossa (Order) > Neotaenioglossa (awaiting allocation) (Family)
     Ischnodactylus Pelseneer, 1886 † · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Ctenochelidae (Family)

Ischnogaster
     Ischnogaster Kriechbaumer, 1890 accepted as Ischnogaster Kriechbaumer, 1890 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Ischnogaster Guérin-Ménéville in Duperry, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Vespidae (Family)

Ischnoglossa
     Ischnoglossa Kraatz, 1856 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Ischnoglossa Saussure, 1860 accepted as Leptonycteris Lydekker in Flower & Lydekker, 1891 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Chiroptera (Order) > Phyllostomidae (Family)

Ischnognathus
     Ischnognathus Duméril & Bibron, 1854 accepted as Ischnognathus Duméril & Bibron, 1854 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Colubridae (Family)
     Ischnognathus Stovall, 1948 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Creodonta (Order) > Hyaenodontidae (Family)

Ischnolepis
     Ischnolepis H. Jumelle & H. Perrier de la Bâthie, 1909 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Apocynaceae (Family)
     Ischnolepis Haughton, 1934 accepted as Ischnolepis Haughton, 1934 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)

Ischnomerus
     Ischnomerus Labram & Imhoff, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)
 Ischnomerus Schönherr, 1840 accepted as Aulacoderes Chevrolat, 1839 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)
 Ischnomerus Schönherr, 1842 accepted as Meconemus Labram & Imhoff, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthribidae (Family)

Ischnophanes
     Ischnophanes Meyrick, 1891 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Coleophoridae (Family)
 Ischnophanes Turner, 1936 accepted as Ischnomorpha Turner, 1937 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Oecophoridae (Family)

Ischnopoda
     Ischnopoda Stephens, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Ischnopoda Blackwelder, 1952 accepted as Atheta Thomson, 1858 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
     Ischnopoda Grandidier, 1869 accepted as Ischnopoda Grandidier, 1869 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Orthoptera (awaiting allocation) (Family)

Ischnopsis
     Ischnopsis Ashmead, 1896 accepted as Ischnopsis Ashmead, 1896 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Eupelmidae (Family)
     Ischnopsis Walsingham, 1881 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Coleophoridae (Family)

Ischnoptera
     Ischnoptera Burmeister, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Blattodea (Order) > Blattellidae (Family)
 Ischnoptera Fox, 1917 accepted as Parcoblatta Hebard, 1917 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Blattodea (Order) > Blattellidae (Family)
 Ischnoptera Turner, 1941 accepted as Elaphromorpha Turner, 1936 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Oecophoridae (Family)
 Ischnoptera Brunner, 1891 accepted as Phanischnoptera Kirby, 1906 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)
     Ischnoptera Béthoux & Nel, 2004 † · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Archaeorthoptera incertae sedis (Order) > Archaeorthoptera incertae sedis (Family)

Ischnopteryx
     Ischnopteryx Enderlein, 1900 accepted as Ischnopteryx Enderlein, 1900 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Psocoptera (Order) > Psocoptera (awaiting allocation) (Family)
 Ischnopteryx Agassiz, 1846 accepted as Ischnopteris Hübner, 1823 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Ischnopus
     Ischnopus Marshall in Mantero, 1904 accepted as Ischnopus Marshall in Mantero, 1904 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Braconidae (Family)
     Ischnopus Kriechbaumer, 1898 accepted as Ischnopus Kriechbaumer, 1898 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Ichneumonidae (Family)
 Ischnopus Amyot, 1846 accepted as Ischnopus Amyot, 1846 (Published in a rejected work (ICZN)) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
 Ischnopus Faust, 1894 accepted as Clarkanthus Alonso-Zarazaga & Lyal, 1999 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Ischnoradsia
     Ischnoradsia Dall, 1879 accepted as Ischnoradsia Dall, 1879 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Ischnoradsia Shuttleworth, 1853 accepted as Ischnochiton Gray, 1847 · Animalia (Kingdom) > Mollusca (Phylum) > Polyplacophora (Class) > Ischnochitonida (Order) > Ischnochitonidae (Family)

Ischnoscelis
     Ischnoscelis Reuter, 1880 accepted as Ischnoscelis Reuter, 1880 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Ischnoscelis Burmeister, 1842 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
 Ischnoscelis Agassiz, 1845 accepted as Geranospiza Kaup, 1847 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Accipitriformes (Order) > Accipitridae (Family)

Ischnosoma
     Ischnosoma Wallengren, 1894 accepted as Ischnosoma Wallengren, 1894 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Odonata (awaiting allocation) (Family)
     Ischnosoma Stephens, 1832 accepted as Ischnosoma Stephens, 1832 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
     Ischnosoma Stephens, 1829 accepted as Ischnosoma Stephens, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Ischnosoma Agassiz in Spix & Agassiz, 1829 accepted as Osteoglossum Cuvier, 1829 (synonym) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Osteoglossiformes (Order) > Osteoglossidae (Family)
 Ischnosoma G.O. Sars, 1866 accepted as Ischnomesus Richardson, 1908 (junior homonym) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Ischnomesidae (Family)

Ischnurus
 Ischnurus Koch, 1837 accepted as Liocheles Sundevall, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Scorpiones (Order) > Liochelidae (Family)
 Ischnurus I.B. Balfour, 1883 accepted as Lepturus R. Brown, 1810 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Poaceae (Family)

Ischyrodon
     Ischyrodon Müller Hal., 1875 · Plantae (Kingdom) > Bryophyta (Phylum) > Bryopsida (Class) > Isobryales (Order) > Fabroniaceae (Family)
     Ischyrodon Merian, 1838 accepted as Ischyrodon Merian, 1838 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)

Ischyrosonyx
     Ischyrosonyx Dejean, 1835 accepted as Ischyrosonyx Dejean, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
 Ischyrosonyx Sturm, 1843 accepted as Eurypedus Gistl, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Ischyrus
     Ischyrus Faldermann, 1837 accepted as Ischyrus Faldermann, 1837 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Ischyrus sensu Crotch, 1876 accepted as Ischyrus sensu Crotch, 1876 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Erotylidae (Family)
     Ischyrus Dejean, 1835 accepted as Ischyrus Dejean, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)

Ishpella
     Ishpella Petrunina, 1990 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)
     Ishpella Petrunina in Petrunina, Sennikov, Ermikov, Zeifert, Krivchikov & Puzyrev, 1984 † accepted as Ishpella Petrunina in Petrunina, Sennikov, Ermikov, Zeifert, Krivchikov & Puzyrev, 1984 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)

Isia
     Isia Walker, 1856 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Arctiidae (Family)
     Isia D.L. Hawksworth & C. Manoharachary, 1978 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Sordariomycetes incertae sedis (Order) > Sordariomycetes incertae sedis (Family)

Isias
     Isias De Notaris, 1844 accepted as Isias De Notaris, 1844 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)
     Isias Boeck, 1865 · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Calanoida (Order) > Centropagidae (Family)

Ismarus
     Ismarus Haliday, 1835 accepted as Ismarus Haliday, 1835 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Ismarus Haag-Rutenberg, 1878 accepted as Simarus Borchmann, 1909 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Ismaya
     Ismaya Colless, 1994 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Rhinophoridae (Family)
     Ismaya Boucek, 1988 accepted as Ismaya Boucek, 1988 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)

Ismene
     Ismene R.A. Salisbury ex Herbert, 1821 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Amaryllidaceae (Family)
     Ismene Swainson, 1820 accepted as Ismene Swainson, 1820 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Hesperiidae (Family)
     Ismene Nickerl, 1846 accepted as Ismene Nickerl, 1846 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Papilionidae (Family)
     Ismene Stephens, 1834 accepted as Ismene Stephens, 1834 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Yponomeutidae (Family)
     Ismene Bogachev, 1936 † accepted as Ismene Bogachev, 1936 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
 Ismene Savigny, 1816 accepted as Bibasis Moore, 1881 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Hesperiidae (Family)

Ismenia
     Ismenia King, 1850 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Terebratulida (Order) > Dallinidae (Family)
     Ismenia Robineau-Desvoidy, 1863 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
 Ismenia Pruvot, 1891 accepted as Ichthyomenia Pilsbry in Tryon & Pilsbry, 1898 (invalid: junior homonym of Ismenia King, 1850 [Brachiopoda] and Ismenia Robineau-Desvoidy, 1863 [Diptera]; Ichtyomenia is a replacement name) · Animalia (Kingdom) > Mollusca (Phylum) > Aplacophora (Class) > Pholidoskepia (Order) > Dondersiidae (Family)

Isnardia
     Isnardia Borrello, 1967 † accepted as Isnardia Borrello, 1967 † (unassessed) · Animalia (Kingdom) > Trace fossils (awaiting allocation) (Phylum) > Trace fossils (awaiting allocation) (Class) > Trace fossils (awaiting allocation) (Order) > Trace fossils (awaiting allocation) (Family)
 Isnardia Linnaeus, 1753 accepted as Ludwigia Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Onagraceae (Family)

Isocardia
     Isocardia Barrande, 1881 † accepted as Isocardia Barrande, 1881 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Praecardioida (Order) > Antipleuridae (Family)
 Isocardia Lamarck, 1799 accepted as Glossus Poli, 1795 (synonym) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Glossidae (Family)

Isocardium
     Isocardium Link, 1807 accepted as Isocardium Link, 1807 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Isocardium Froriep, 1806 accepted as Glossus Poli, 1795 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Glossidae (Family)

Isocarpha
     Isocarpha R. Brown, 1817 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Isocarpha Lessing, 1830 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Isocasnonia
     Isocasnonia Csiki, 1932 accepted as Isocasnonia Csiki, 1932 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Isocasnonia Liebke, 1938 accepted as Colliuris de Geer, 1774 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Isocerus
     Isocerus Illiger, 1802 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Isocerus Dejean, 1821 accepted as Isocerus Dejean, 1821 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Isocerus Laporte in Brullé, 1840 accepted as Isocerus Laporte in Brullé, 1840 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Isocerus Latreille, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Isochaeta
 Isochaeta Giesbrecht, 1889 accepted as Lucicutia Giesbrecht, 1898 (suppressed by ICZN, see Case 2666) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Calanoida (Order) > Lucicutiidae (Family)
 Isochaeta Pointner, 1911 accepted as Isochaetides Hrabĕ, 1966 · Animalia (Kingdom) > Annelida (Phylum) > Oligochaeta (Class) > Haplotaxida (Order) > Naididae (Family)

Isochirus
     Isochirus Desmarest, 1823 accepted as Isochirus Desmarest, 1823 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Crustacea (awaiting allocation) (Class) > Crustacea (awaiting allocation) (Order) > Crustacea (awaiting allocation) (Family)
 Isochirus Reitter, 1892 accepted as Turanella Semenov, 1905 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Isocladus
     Isocladus Miers, 1876 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Sphaeromatidae (Family)
     Isocladus S.O. Lindberg, 1862 accepted as Isocladus S.O. Lindberg, 1862 (unassessed) · Plantae (Kingdom) > Bryophyta (Phylum) > Sphagnopsida (Class) > Sphagnales (Order) > Sphagnaceae (Family)

Isocolus
     Isocolus Förster, 1869 accepted as Isocolus Förster, 1869 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Isocolus Zittel, 1885 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Asaphida (Order) > Asaphida (awaiting allocation) (Family)

Isocordia
     Isocordia Bruguière, 1792 accepted as Isocordia Bruguière, 1792 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Isocordia Sacco, 1901 accepted as Glossus Poli, 1795 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Glossidae (Family)

Isocrinites
     Isocrinites Meyer, 1835 accepted as Isocrinites Meyer, 1835 · Animalia (Kingdom) > Echinodermata (Phylum) > Echinodermata (awaiting allocation) (Class) > Echinodermata (awaiting allocation) (Order) > Echinodermata (awaiting allocation) (Family)
     Isocrinites Phillips, 1841 † accepted as Isocrinites Phillips, 1841 † (unassessed) · Animalia (Kingdom) > Echinodermata (Phylum) > Echinodermata (awaiting allocation) (Class) > Echinodermata (awaiting allocation) (Order) > Echinodermata (awaiting allocation) (Family)

Isocrinus
     Isocrinus von Meyer in Agassiz, 1836 † · Animalia (Kingdom) > Echinodermata (Phylum) > Crinoidea (Class) > Isocrinida (Order) > Isocrinidae (Family)
     Isocrinus Phillips, 1841 † accepted as Isocrinus Phillips, 1841 † (unassessed) · Animalia (Kingdom) > Echinodermata (Phylum) > Echinodermata (awaiting allocation) (Class) > Echinodermata (awaiting allocation) (Order) > Echinodermata (awaiting allocation) (Family)
     Isocrinus Meyer, 1835 accepted as Isocrinus von Meyer in Agassiz, 1836 † · Animalia (Kingdom) > Echinodermata (Phylum) > Crinoidea (Class) > Isocrinida (Order) > Isocrinidae (Family)

Isocyclidium
     Isocyclidium Esteban, Finlay & Embley, 1993 · Chromista (Kingdom) > Ciliophora (Phylum) > Oligohymenophorea (Class) > Scuticociliatida (Order) > Cyclidiidae (Family)
     Isocyclidium Esteban, Finlay & Embley, 1993 accepted as Isocyclidium Esteban, Finlay & Embley, 1993 · Chromista (Kingdom) > Ciliophora (Phylum) > Oligohymenophorea (Class) > Scuticociliatida (Order) > Cyclidiidae (Family)

Isodactylus
     Isodactylus Gray, 1845 accepted as Isodactylus Gray, 1845 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
 Isodactylus Dal Piaz, 1927 † accepted as Isodactylella Strand, 1943 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)
 Isodactylus Hedges, Duellman & Heinicke, 2008 accepted as Hypodactylus Hedges, Duellman & Heinicke, 2008 · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Anura (Order) > Craugastoridae (Family)

Isodictya
     Isodictya Bowerbank, 1864 · Animalia (Kingdom) > Porifera (Phylum) > Demospongea (Class) > Poecilosclerida (Order) > Isodictyidae (Family)
     Isodictya Bowerbank in MacAndrew, 1861 accepted as Isodictya Bowerbank, 1864 · Animalia (Kingdom) > Porifera (Phylum) > Demospongea (Class) > Poecilosclerida (Order) > Isodictyidae (Family)

Isodon
     Isodon Hope, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
     Isodon (Schrader ex Bentham) Spach, 1840 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Lamiaceae (Family)
 Isodon Douvillé, 1912 † accepted as Isodon Douvillé, 1912 † (Unjustified (?) emendation) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Isodon Say, 1822 accepted as Isoodon Geoffroy in Desmarest, 1817 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Peramelemorphia (Order) > Peramelidae (Family)
 Isodon Agassiz, 1846 accepted as Isoodon Geoffroy in Desmarest, 1817 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Peramelemorphia (Order) > Peramelidae (Family)

Isodonta
     Isodonta Buvignier, 1851 † accepted as Isodonta Buvignier, 1851 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Isodonta Cameron, 1910 accepted as Isodontia Patton, 1880 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Sphecidae (Family)

Isodontiaphila
 Isodontiaphila Bohart, 1941 accepted as Isodontiaphila Bohart, 1941 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Isodontiaphila Pierce, 1918 accepted as Paraxenos Saunders, 1872 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Strepsiptera (Order) > Stylopidae (Family)

Isodus
     Isodus Heckel in Russegger, 1849 accepted as Isodus Heckel in Russegger, 1849 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
     Isodus M'Coy, 1848 accepted as Isodus M'Coy, 1848 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)

Isoentomon
     Isoentomon Nosek, 1978 · Animalia (Kingdom) > Arthropoda (Phylum) > Protura (Class) > Eosentomata (Order) > Eosentomidae (Family)
     Isoentomon Tuxen, 1975 · Animalia (Kingdom) > Arthropoda (Phylum) > Protura (Class) > Eosentomata (Order) > Eosentomidae (Family)
     Isoentomon Nosek, 1975 accepted as Isoentomon Nosek, 1978 · Animalia (Kingdom) > Arthropoda (Phylum) > Protura (Class) > Eosentomata (Order) > Eosentomidae (Family)

Isoetopsis
 Isoetopsis Saporta, 1888 † accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Lycopodiopsida (Class) > Isoetales (Order) > Isoetaceae (Family)
     Isoetopsis Turczaninow, 1851 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Isoglossa
     Isoglossa Coquillett, 1895 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
     Isoglossa Oersted, 1854 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Acanthaceae (Family)
 Isoglossa Casey, 1893 accepted as Rheobioma Casey, 1906 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)

Isognathus
 Isognathus Kolbe, 1888 accepted as Bolbocranius Kolbe, 1897 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)
     Isognathus Felder, 1862 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)

Isognomon
     Isognomon Lightfoot, 1786 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pterioida (Order) > Pteriidae (Family)
 Isognomon Link, 1807 accepted as Isognomon Lightfoot, 1786 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pterioida (Order) > Pteriidae (Family)

Isogramma
     Isogramma Meek & Worthen, 1873 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Spiriferida (Order) > Articulata (awaiting allocation) (Family)
     Isogramma King, 1955 accepted as Isogramma King, 1955 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Isogramma Rothschild & Jordan, 1903 accepted as Isogramma Rothschild & Jordan, 1903 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)

Isolampas
     Isolampas Lambert in Chautard, 1905 † accepted as Isolampas Lambert in Chautard, 1905 † · Animalia (Kingdom) > Echinodermata (Phylum) > Echinodermata (awaiting allocation) (Class) > Echinodermata (awaiting allocation) (Order) > Echinodermata (awaiting allocation) (Family)
 Isolampas Lambert, 1906 † accepted as Echinolampas Gray, 1825 (subjective junior synonym) · Animalia (Kingdom) > Echinodermata (Phylum) > Echinoidea (Class) > Cassiduloida (Order) > Echinolampadidae (Family)

Isoleda
     Isoleda Ryckholt, 1854 † accepted as Isoleda Ryckholt, 1854 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Bivalvia (awaiting allocation) (Order) > Bivalvia (awaiting allocation) (Family)
 Isoleda Rollier, 1923 † accepted as Rollieria Cossmann, 1920 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Nuculida (Order) > Nuculida (awaiting allocation) (Family)

Isoloba
     Isoloba Warren, 1893 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Isoloba Rafinesque, 1838 accepted as Isoloba Rafinesque, 1838 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Lentibulariaceae (Family)

Isoloma
 Isoloma Decaisne, 1848 accepted as Kohleria Regel, 1847 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Gesneriaceae (Family)
 Isoloma J. Smith, 1841 accepted as Lindsaea Dryander ex Smith, 1793 · Plantae (Kingdom) > Tracheophyta (Phylum) > Polypodiopsida (Class) > Polypodiales (Order) > Lindsaeaceae (Family)

Isolus
     Isolus Rafinesque, 1815 accepted as Isolus Rafinesque, 1815 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Crustacea (awaiting allocation) (Class) > Crustacea (awaiting allocation) (Order) > Crustacea (awaiting allocation) (Family)
     Isolus Rafinesque, 1814 accepted as Isolus Rafinesque, 1814 · Animalia (Kingdom) > Arthropoda (Phylum) > Crustacea (awaiting allocation) (Class) > Crustacea (awaiting allocation) (Order) > Crustacea (awaiting allocation) (Family)

Isomera
     Isomera Robineau-Desvoidy, 1851 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tachinidae (Family)
 Isomera Fairmaire, 1866 accepted as Isomira Mulsant, 1856 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Isomeria
     Isomeria Albers, 1850 accepted as Isomeria Albers, 1850 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Camaenidae (Family)
     Isomeria Chevallier · Chromista (Kingdom) > Ochrophyta (Phylum) > Bacillariophyceae (Class) > (Order) > Bacillariophyceae incertae sedis (Family)

Isomerinthus
     Isomerinthus Desmarest in Vaillant, 1842 accepted as Isomerinthus Desmarest in Vaillant, 1842 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Isomerinthus Schoenherr, 1842 accepted as Sphaeropterus Guérin-Ménéville in Duperry, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Isomeris
     Isomeris Townes, 1969 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Ichneumonidae (Family)
 Isomeris Nuttall in J. Torrey & A. Gray, 1838 accepted as Cleome Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Cleomaceae (Family)

Isomerus
     Isomerus Gistl, 1834 accepted as Isomerus Gistl, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Isomerus Motschoulsky, 1860 accepted as Terminasiania Alonso-Zarazaga & Lyal, 1999 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Isomita
     Isomita K.M. Diesing, 1848 accepted as Isomita K.M. Diesing, 1848 (unassessed) · Protozoa (Kingdom) > (Phylum) > (Class) > Sarcomastigota (awaiting allocation) (Order) > Flagellata (awaiting allocation) (Family)
     Isomita T. Cavalier-Smith · Protozoa (Kingdom) > Protozoa incertae sedis (Phylum) > (Class) > (Order) > (Family)

Isomma
     Isomma Selys, 1892 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Gomphidae (Family)
     Isomma Jordan, 1927 † accepted as Isomma Jordan, 1927 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)

Isomyllocerus
 Isomyllocerus Voss, 1937 accepted as Myllocerus Schönherr, 1823 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Isomyllocerus Marshall, 1954 accepted as Myllocerus Schönherr, 1823 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Isonema
     Isonema Meek & Worthen, 1865 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Gastropoda incertae sedis (Order) > Anomphalidae (Family)
     Isonema R. Brown, 1810 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Apocynaceae (Family)
 Isonema Cassini, 1817 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
     Isonema F.L. Schuster, S. Goldstein & B. Hershenov, 1968 · Protozoa (Kingdom) > Euglenozoa (Phylum) > Diplonemea (Class) > Diplonemida (Order) > Diplonemidae (Family)
 Isonema Maas, 1906 accepted as Arctapodema Dall, 1907 (preoccupied by mollusc genus) · Animalia (Kingdom) > Cnidaria (Phylum) > Hydrozoa (Class) > Trachylina (Order) > Rhopalonematidae (Family)
 Isonema Hall, 1891 accepted as Littorina Férussac, 1822 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Littorinidae (Family)

Isonotus
     Isonotus Dahlbom, 1842 accepted as Isonotus Dahlbom, 1842 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Isonotus Houlbert, 1934 accepted as Isonotus Houlbert, 1934 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dytiscidae (Family)
     Isonotus Lepeletier & Serville, 1828 accepted as Isonotus Lepeletier & Serville, 1828 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Isonotus Perty, 1832 accepted as Isonotus Perty, 1832 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Isonotus Guignot, 1936 accepted as Hydaticus Leach, 1817 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dytiscidae (Family)

Isopetalum
     Isopetalum Lambert, 1911 † · Animalia (Kingdom) > Echinodermata (Phylum) > Echinoidea (Class) > Spatangoida (Order) > Spatangoida (awaiting allocation) (Family)
 Isopetalum (A.P. de Candolle) Ecklon & Zeyher, 1835 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Geraniales (Order) > Geraniaceae (Family)
 Isopetalum Sweet, 1822 accepted as Pelargonium L'Héritier ex W. Aiton, 1789 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Geraniales (Order) > Geraniaceae (Family)

Isophyllum
 Isophyllum Spach, 1836 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Clusiaceae (Family)
     Isophyllum G.F. Hoffmann, 1814 accepted as Isophyllum G.F. Hoffmann, 1814 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Apiales (Order) > Apiaceae (Family)

Isoplastus
     Isoplastus Skuse, 1889 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Chironomidae (Family)
     Isoplastus Horn, 1880 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Leiodidae (Family)

Isoplata
     Isoplata Förster, 1856 accepted as Isoplata Förster, 1856 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Isoplata Girault, 1913 accepted as Gastrancistrus Westwood, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Pteromalidae (Family)

Isopleurus
     Isopleurus Meek, 1864 accepted as Isopleurus Meek, 1864 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Isopleurus Kirby in Richardson, 1837 accepted as Amara Bonelli, 1810 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Isopogon
     Isopogon R. Brown ex J. Knight, 1809 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Proteales (Order) > Proteaceae (Family)
     Isopogon Loew, 1847 accepted as Isopogon Loew, 1847 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Asilidae (Family)

Isoptera
     Isoptera · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Isoptera (Order) > (Family)
 Isoptera Okamura, 1901 accepted as · Plantae (Kingdom) > Rhodophyta (Phylum) > Florideophyceae (Class) > Ceramiales (Order) > Rhodomelaceae (Family)
 Isoptera Scheffer ex Burck, 1887 accepted as Shorea Roxburgh ex C.F. Gaertner, 1805 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malvales (Order) > Dipterocarpaceae (Family)

Isopteron
     Isopteron Hope, 1840 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
     Isopteron Horn, 1840 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Isopteryx
     Isopteryx Klotzsch, 1854 accepted as Isopteryx Klotzsch, 1854 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Cucurbitales (Order) > Begoniaceae (Family)
     Isopteryx Guenée, 1854 accepted as Isopteryx Guenée, 1854 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Isopteryx Pictet, 1841 accepted as Chloroperla Newman, 1836 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Plecoptera (Order) > Chloroperlidae (Family)

Isopus
     Isopus Montrouzier, 1860 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Isopus Faust, 1898 accepted as Homoeopus Berg, 1899 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Isopus Taczanowski, 1872 accepted as Tapinillus Simon, 1898 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Oxyopidae (Family)

Isopyrum
     Isopyrum Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ranunculales (Order) > Ranunculaceae (Family)
 Isopyrum Adanson, 1763 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ranunculales (Order) > Ranunculaceae (Family)

Isora
     Isora Mulsant, 1850 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coccinellidae (Family)
     Isora P. Miller, 1754 accepted as Isora P. Miller, 1754 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malvales (Order) > Malvaceae (Family)

Isorhynchus
     Isorhynchus Schönherr, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Isorhynchus King, 1850 † accepted as Equirostra Cooper & Muir-Wood, 1951 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Pentamerida (Order) > Porambonitidae (Family)

Isorrhinus
 Isorrhinus Gemminger & Harold, 1871 accepted as Isorhinus Capiomont, 1867 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Isorrhinus Champion, 1902 accepted as Isorhinus Capiomont, 1867 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Isosaphanus
     Isosaphanus Hintz, 1913 accepted as Isosaphanus Hintz, 1913 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
     Isosaphanus Lepesme & Breuning, 1956 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Isosoma
 Isosoma Ménétriés, 1832 accepted as Phyllocerus Lepeletier & Serville, 1825 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Plastoceridae (Family)
 Isosoma M. Svrcek, 1989 accepted as Cudoniella P.A. Saccardo, 1889 · Fungi (Kingdom) > Ascomycota (Phylum) > Leotiomycetes (Class) > Helotiales (Order) > Helotiaceae (Family)
 Isosoma Walker, 1832 accepted as Tetramesa Walker, 1848 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Eurytomidae (Family)
 Isosoma Billberg, 1820 accepted as Oides Weber, 1801 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Isotarsus
 Isotarsus LaFerté-Sénectère, 1851 accepted as Craspedophorus Hope, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Isotarsus Chaudoir, 1878 accepted as Psecadius Alluaud, 1911 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)

Isothea
     Isothea E.M. Fries, 1849 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Phyllachorales (Order) > Phyllachoraceae (Family)
     Isothea Scudder, 1893 † · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Attelabidae (Family)

Isotima
     Isotima Förster, 1868 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Ichneumonidae (Family)
     Isotima Brunner von Wattenwyl, 1878 accepted as Isotima Brunner von Wattenwyl, 1878 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Orthoptera (awaiting allocation) (Family)

Isotoma
     Isotoma Bourlet, 1839 · Animalia (Kingdom) > Arthropoda (Phylum) > Collembola (Class) > Entomobryomorpha (Order) > Isotomidae (Family)
     Isotoma Dejean, 1834 accepted as Isotoma Dejean, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
     Isotoma (R. Brown) J. Lindley, 1826 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Campanulaceae (Family)
 Isotoma Blanchard, 1845 accepted as Isocera Borchmann, 1909 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Isotomiella
     Isotomiella Bagnall, 1939 · Animalia (Kingdom) > Arthropoda (Phylum) > Collembola (Class) > Entomobryomorpha (Order) > Isotomidae (Family)
     Isotomiella Deharveng & Fjellberg, 1993 · Animalia (Kingdom) > Arthropoda (Phylum) > Collembola (Class) > Entomobryomorpha (Order) > Isotomidae (Family)

Isozoanthus
     Isozoanthus Carlgren in Nordgaard, 1905 · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Zoantharia (Order) > Parazoanthidae (Family)
     Isozoanthus Carlgren in Chun, 1903 · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Zoantharia (Order) > Parazoanthidae (Family)

Ispida
     Ispida Brisson, 1760 accepted as Ispida Brisson, 1760 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Ispida Möhring, 1758 accepted as Ispida Möhring, 1758 (Published in a rejected work (ICZN)) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Issa
     Issa Walker, 1867 accepted as Issa Walker, 1867 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Issa Bergh, 1881 accepted as Colga Bergh, 1880 (Unnecessary substitute name for Colga and junior homonym of Issa Walker, 1867; Issena is a replacement name) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Nudibranchia (Order) > Polyceridae (Family)

Issedonia
     Issedonia Popov in Nazarov & Popov, 1980 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Lingulata (Class) > Linguliporida (Order) > Torynelasmatidae (Family)
     Issedonia Emelyanov, 1972 accepted as Issedonia Emelyanov, 1972 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Delphacidae (Family)

Isselia
     Isselia S. Squinabol, 1891 † accepted as Isselia S. Squinabol, 1891 † (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Arecales (Order) > Arecaceae (Family)
 Isselia Semper in Schmeltz, 1874 accepted as Stosicia Brusina, 1870 (nomen nudum) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Rissoinidae (Family)
 Isselia Bourguignat, 1877 accepted as Daudebardia Hartmann in Sturm, 1821 · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Isshikia
     Isshikia Shiraki, 1918 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tabanidae (Family)
     Isshikia Chûjô, 1961 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Issikia
     Issikia Chûko, 1961 accepted as Issikia Chûko, 1961 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Issikia Zoological Record, 1961 accepted as Isshikia Chûjô, 1961 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Issina
     Issina Melichar, 1906 accepted as Issina Melichar, 1906 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Issidae (Family)
 Issina Jousseaume, 1898 accepted as Thecodonta A. Adams, 1864 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Galeommatidae (Family)

Issites
     Issites Ljaschenko, 1980 † accepted as Issites Ljaschenko, 1980 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Tentaculita (Class) > Volynitida (Order) > Turmalitidae (Family)
     Issites Haupt, 1956 † accepted as Issites Haupt, 1956 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Isthmia
     Isthmia C.Agardh, 1832 · Chromista (Kingdom) > Ochrophyta (Phylum) > Bacillariophyceae (Class) > Centrales (Order) > Biddulphiaceae (Family)
     Isthmia Walker, 1851 accepted as Isthmia Walker, 1851 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Tettigometridae (Family)
     Isthmia Gray, 1821 accepted as Isthmia Gray, 1821 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Isthmia Ehrenberg, 1854 † accepted as Isthmia Ehrenberg, 1854 † (unassessed) · Protozoa (Kingdom) > (Phylum) > Protozoa (awaiting allocation) (Class) > (Order) > (Family)

Isthmiella
     Isthmiella Cleve, 1873 · Chromista (Kingdom) > Ochrophyta (Phylum) > Bacillariophyceae (Class) > Bacillariophyceae (awaiting allocation) (Order) > Bacillariophyceae (awaiting allocation) (Family)
     Isthmiella Darker, 1967 · Fungi (Kingdom) > Ascomycota (Phylum) > Leotiomycetes (Class) > Rhytismatales (Order) > Rhytismataceae (Family)

Istiophorus
     Istiophorus Lacepède, 1801 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Istiophoridae (Family)
 Istiophorus Gray, 1825 accepted as Trachops Gray, 1847 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Chiroptera (Order) > Phyllostomidae (Family)

Isurus
     Isurus Rafinesque, 1810 · Animalia (Kingdom) > Chordata (Phylum) > Chondrichthyes (Class) > Lamniformes (Order) > Lamnidae (Family)
 Isurus Agassiz, 1844 † accepted as Isurichthys Woodward, 1901 † · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Perciformes (awaiting allocation) (Family)
     Isurus Agassiz, 1836 † accepted as Isurichthys Woodward, 1901 † · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Perciformes (awaiting allocation) (Family)

Isus
     Isus Champion, 1906 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Isus Bleeker, 1859 accepted as Leuciscus Cuvier, 1816 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Cypriniformes (Order) > Cyprinidae (Family)

Italoptygmatis
     Italoptygmatis Akopyan, 1973 † accepted as Italoptygmatis Akopyan, 1973 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Gastropoda (awaiting allocation) (Order) > Gastropoda (awaiting allocation) (Family)
     Italoptygmatis Akopyan, 1976 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Heterostropha (Order) > Heterostrophia (awaiting allocation) (Family)

Itamus
     Itamus Schmidt-Goebel, 1846 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Carabidae (Family)
 Itamus Loew, 1849 accepted as Paritamus Verrall, 1909 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Asilidae (Family)
 Itamus Raffray, 1904 accepted as Raffrayolus Jacobson, 1914 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Staphylinidae (Family)
 Itamus Förster, 1868 accepted as Uchidella Townes, 1957 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Ichneumonidae (Family)

Itanus
     Itanus Doubleday in Doubleday & Westwood, 1848 accepted as Itanus Doubleday in Doubleday & Westwood, 1848 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Itanus Felder, 1861 accepted as Itanus Felder, 1861 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Itatiaya
     Itatiaya Bechyně, 1953 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
     Itatiaya Mello-Leitão, 1915 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Ctenidae (Family)
     Itatiaya Schmidt, 1932 accepted as Itatiaya Schmidt, 1932 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Issidae (Family)
 Itatiaya Roewer, 1928 accepted as Acutisoma Roewer, 1913 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Opiliones (Order) > Gonyleptidae (Family)

Itea
     Itea Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Saxifragales (Order) > Iteaceae (Family)
     Itea Koch, 1838 accepted as Itea Koch, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Trichoniscidae (Family)

Ithagenes
     Ithagenes Förster, 1868 accepted as Ithagenes Förster, 1868 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
 Ithagenes Agassiz, 1846 accepted as Ithaginis Wagler, 1832 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Galliformes (Order) > Phasianidae (Family)

Ithone
     Ithone Newman, 1838 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Neuroptera (Order) > Ithonidae (Family)
 Ithone Solsky, 1872 accepted as Aiolocaria Crotch, 1871 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coccinellidae (Family)

Ithyphallus
     Ithyphallus Harold, 1875 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Ithyphallus S.F. Gray, 1821 accepted as Mutinus E.M. Fries, 1849 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Phallales (Order) > Phallaceae (Family)

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

Itia
     Itia Marwick, 1931 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Mitromorphidae (Family)
     Itia Molina, 1810 accepted as Itia Molina, 1810 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Dipsacales (Order) > Caprifoliaceae (Family)

Itieria
     Itieria Matheron, 1842 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Heterostropha (Order) > Heterostrophia (awaiting allocation) (Family)
     Itieria G. Saporta, 1872 † accepted as Itieria G. Saporta, 1872 † (unassessed) · Plantae (Kingdom) > Algae (awaiting allocation) (Phylum) > Algae (awaiting allocation) (Class) > Algae (awaiting allocation) (Order) > Algae (awaiting allocation) (Family)

Ituna
     Ituna Doubleday in Doubleday & Westwood, 1847 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Danaidae (Family)
 Ituna Walker, 1854 accepted as Tuina Butler, 1877 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Arctiidae (Family)

Itylos
     Itylos Draudt in Seitz, 1921 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lycaenidae (Family)
     Itylos Nabakov, 1945 accepted as Itylos Nabakov, 1945 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)

Itys
     Itys Wagler, 1831 accepted as Itys Wagler, 1831 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Itys Nicéville, 1895 accepted as Itys Nicéville, 1895 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Itys Cambridge, 1894 accepted as Grammonota Emerton, 1882 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Linyphiidae (Family)

Iulus
     Iulus Wollaston, 1878 accepted as Iulus Wollaston, 1878 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Discidae (Family)
     Iulus R.A. Salisbury, 1866 accepted as Iulus R.A. Salisbury, 1866 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Liliales (Order) > Liliaceae (Family)
 Iulus accepted as Julus Linnaeus, 1758 · Animalia (Kingdom) > Arthropoda (Phylum) > Diplopoda (Class) > Julida (Order) > Julidae (Family)

Iungia
 Iungia Linnaeus f., 1782 accepted as Iungia Linnaeus f., 1782 (Misspelling) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Iungia Boehmer in Ludwig, 1760 accepted as Iungia Boehmer in Ludwig, 1760 (Misspelling) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Acanthaceae (Family)

Iva
 Iva Fabricius, 1759 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Lamiaceae (Family)
     Iva Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
 Iva Lubbock, 1853 accepted as Pontella Dana, 1846 (synonym) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Calanoida (Order) > Pontellidae (Family)

Ivanantonia
     Ivanantonia Shevyreva, 1989 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Rodentia (Order) > Ivanantoniidae (Family)
     Ivanantonia Shevyreva, 1983 † accepted as Ivanantonia Shevyreva, 1983 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Rodentia (Order) > Ivanantoniidae (Family)
     Ivanantonia Shevyreva in Badamgarav & Reshetov, 1985 † accepted as Ivanantonia Shevyreva in Badamgarav & Reshetov, 1985 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Rodentia (Order) > Ivanantoniidae (Family)

Ivania
     Ivania Lewis, 1895 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Melandryidae (Family)
     Ivania O.E. Schulz, 1933 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Brassicales (Order) > Brassicaceae (Family)
 Ivania Zittel, 1895 † accepted as Baylea Koninck, 1883 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Vetigastropoda (Order) > Gosseletinidae (Family)

Ivanovia
     Ivanovia I.V. Khvorova, 1946 † · Plantae (Kingdom) > Chlorophyta (Phylum) > Ulvophyceae (Class) > Bryopsidales (Order) > Codiaceae (Family)
     Ivanovia Dobrolyubova, 1935 † · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Rugosa (Order) > Petalaxidae (Family)

Ivanoviella
     Ivanoviella Makridin, 1955 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Rhynchonellida (Order) > Rhynchonellidae (Family)
     Ivanoviella Abushik et al., 1960 † accepted as Ivanoviella Abushik et al., 1960 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Ostracoda (awaiting allocation) (Order) > Ostracoda (awaiting allocation) (Family)
     Ivanoviella Ivanova, 1960 † accepted as Ivanoviella Ivanova, 1960 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Ostracoda (awaiting allocation) (Order) > Ostracoda (awaiting allocation) (Family)

Ivesia
     Ivesia Torrey & A. Gray, 1858 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Rosales (Order) > Rosaceae (Family)
 Ivesia Petrunkevitch, 1925 accepted as Nesticus Thorell, 1869 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Nesticidae (Family)
 Ivesia Boynton & Ford, 1995 † accepted as Ivesheadia Boynton & Ford, 1996 † · Animalia (Kingdom) > Orthonectida (Phylum) > Orthonectida (unallocated) (Class) > Heterocyemida (Order) > Conocyemidae (Family)

Ivshiniellus
     Ivshiniellus Korobov, 1966 † accepted as Ivshiniellus Korobov, 1966 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)
     Ivshiniellus Korobov, 1966 † accepted as Ivshiniellus Korobov, 1966 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)

Iwanagara
 Iwanagara R.A. Rolfe, 1896 accepted as Iwanagaara R.A. Rolfe, 1896 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)
     Iwanagara Hort., 1960 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Orchidaceae (Family)

Iwayaspis
     Iwayaspis Kobayashi, 1960 † accepted as Iwayaspis Kobayashi, 1960 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)
     Iwayaspis Kobayashi, 1962 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)

Ixalus
     Ixalus Ogilby, 1837 accepted as Ixalus Ogilby, 1837 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)
 Ixalus Koch in Koch (Keyserling), 1873 accepted as Ixamatus Simon, 1888 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Nemesiidae (Family)
 Ixalus Duméril & Bibron, 1841 accepted as Philautus Gistl, 1848 · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Anura (Order) > Rhacophoridae (Family)
 Ixalus Gistl, 1848 accepted as Platynotus Fabricius, 1801 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Ixia
     Ixia Kerzhner, 1972 † accepted as Ixia Kerzhner, 1972 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Ixia Linnaeus, 1762 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Iridaceae (Family)
 Ixia Linnaeus, 1753 accepted as Ixia Linnaeus, 1753 (nomen rejiciendum) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Iridaceae (Family)

Ixias
     Ixias Hübner, 1819 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Pieridae (Family)
 Ixias Sainte-Claire Deville, 1924 accepted as Ixapion Roudier & Tempère, 1973 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)

Ixion
 Ixion Paul'son, 1875 accepted as Cyphocarcinus A. Milne-Edwards, 1868 (name pre-occupied by Ixion Reitter, 1873 [Coleoptera]) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Majidae (Family)
 Ixion Alderslade, 2001 accepted as Ezziona Alderslade & Janes, 2017 (junior homonym) · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Alcyonacea (Order) > Xeniidae (Family)
     Ixion Reitter, 1873 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Monotomidae (Family)

Ixobiodes
     Ixobiodes Fonseca, 1934 accepted as Ixobiodes Fonseca, 1934 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Arachnida (awaiting allocation) (Order) > Arachnida (awaiting allocation) (Family)
 Ixobiodes Zoological Record accepted as Ixobioides Fonseca, 1934 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Ixodorhynchidae (Family)

Ixodes
 Ixodes Blyth, 1846 accepted as Ixodes Blyth, 1846 (Misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Ixodes Latreille, 1795 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Ixodida (Order) > Ixodidae (Family)

Ixodia
     Ixodia Blyth, 1845 accepted as Ixodia Blyth, 1845 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Ixodia R. Brown ex W.T. Aiton, 1812 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Ixus
 Ixus Ehrenberg, 1833 accepted as Ixos Temminck in Temminck & Laugier, 1825 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Pycnonotidae (Family)
     Ixus Dejean, 1821 accepted as Hypera Germar, 1817 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)