Between brackets is the number of accepted species
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- Biota
- Kingdom Animalia
- Phylum Acanthocephala
- Phylum Agmata †
- Phylum Animalia (awaiting allocation)
- Phylum Animalia incertae sedis
- Phylum Annelida
- Phylum Arthropoda
- Phylum Brachiopoda
- Phylum Bryozoa
- Phylum Cephalorhyncha incertae sedis
- Phylum Chaetognatha
- Phylum Chitinozoa †
- Phylum Chordata
- Subphylum Cephalochordata
- Subphylum Tunicata accepted as Urochordata
- Subphylum Urochordata
- Subphylum Vertebrata
- Superclass Tetrapoda
- Class Amphibia
- Class Aves
- Class Mammalia
- Class Mammaliaformes incertae sedis †
- Class Reptilia
- Order Aetosauria †
- Order Anapsida (awaiting allocation)
- Order Araeoscelida † represented as Araeoscelidia †
- Order Araeoscelidia †
- Order Archosauria (awaiting allocation) †
- Order Archosauria incertae sedis
- Order Archosauriformes incertae sedis †
- Order Archosauromorpha incertae sedis †
- Order Avetheropoda †
- Order Captorhinida †
- Order Chelonia accepted as Testudines
- Order Choristodera †
- Order Cotylosauria †
- Order Crocodylia
- Order Crocodyliformes incertae sedis
- Order Crocodylomorpha incertae sedis
- Order Diapsida incertae sedis †
- Order Dinosauria (awaiting allocation) †
- Order Dinosauria incertae sedis †
- Order Dinosauriformes (awaiting allocation) †
- Order Eosuchia †
- Order Eusuchia incertae sedis
- Order Herrerasauria †
- Order Huenesuchia †
- Order Hupehsuchia †
- Order Ichthyopterygia (awaiting allocation) †
- Order Ichthyosauria †
- Order Lepidosauria (awaiting allocation)
- Order Lepidosauria incertae sedis
- Order Lepidosauromorpha incertae sedis
- Order Loricata incertae sedis
- Order Mesoeucrocodylia incertae sedis
- Order Neodiapsida incertae sedis
- Order Neosuchia incertae sedis
- Order Nothosauria †
- Order Ornithischia †
- Order Parareptilia incertae sedis †
- Order Paraves incertae sedis †
- Order Pareiasauria †
- Order Pelycosauria †
- Order Placodontia †
- Order Plesiosauria †
- Order Procolophonoidea †
- Order Procolophonomorpha †
- Order Prolacertiformes †
- Order Protorosauria †
- Order Pterosauria †
- Order Pterosauromorpha incertae sedis †
- Order Rauisuchiformes †
- Order Reptilia (awaiting allocation)
- Order Reptilia incertae sedis
- Order Rhynchocephalia
- Order Rhynchosauria †
- Order Saurischia †
- Order Sauropsida (awaiting allocation) †
- Order Sauropterygia † accepted as Sauropterygia incertae sedis
- Order Sauropterygia incertae sedis
- Order Sphenodontida
- Order Squamata
- Family Acrochordidae Bonaparte, 1840
- Family Acrodonta incertae sedis
- Family Agamidae Gray, 1827
- Genus Acanthocercus Fitzinger, 1843
- Genus Acanthosaura Gray, 1831
- Genus Adelynhosersaur Hoser, 2013 accepted as Hypsilurus Peters, 1867
- Genus Adelynkimberleyea Hoser, 2012 accepted as Laudakia Gray, 1845
- Genus Agama Daudin, 1802
- Genus Agamatajikistanensis Hoser, 2012 accepted as Laudakia Gray, 1845
- Genus Agasthyagama Srikanthan, Adhikari, Ganesh, Deuti, Das, Kulkarni, Gowande & Shanker, 2021
- Genus Amboncalotes Hoser, 2014 accepted as Calotes Cuvier, 1817
- Genus Amphibolurus Wagler, 1830
- Genus Aphaniotis Peters, 1864
- Genus Aphaniotus accepted as Aphaniotis Peters, 1864
- Genus Aporoscelis Boulenger, 1885
- Genus Arpephorus Duméril, 1851 accepted as Harpesaurus Boulenger, 1885
- Genus Arua Doria, 1875
- Genus Barbaturex Head, Gunnell, Holroyd, Hutchison & Ciochon, 2013 †
- Genus Barycephalus Günther, 1860
- Genus Biancia Gray, 1853
- Genus Borgsaurus Hoser, 2014 accepted as Saara Gray, 1845
- Genus Brachysaura Blyth, 1856
- Genus Bronchocela Kaup, 1827
- Genus Bronchocele accepted as Bronchocela Kaup, 1827
- Genus Bronchoceles Troschel, 1841 accepted as Bronchocela Kaup, 1827
- Genus Bufoniceps Arnold, 1992
- Genus Caimanops Storr, 1974
- Genus Calotella Steindachner, 1867
- Genus Calotes Cuvier, 1817
- Genus Calotes Rafinesque, 1815
- Genus Centrocercus Fitzinger, 1843
- Genus Centrotrachelus Strauch, 1863
- Genus Ceratophora Gray, 1832-35
- Genus Ceyloncalotes Hoser, 2014 accepted as Calotes Cuvier, 1817
- Genus Charasia Gray, 1845
- Genus Chelasonia Gray, 1845 accepted as Chelosania Gray, 1845
- Genus Chelosania Gray, 1845
- Genus Chlamydophorus J.E. Gray, 1842 accepted as Chlamydosaurus Gray, 1825
- Genus Chlamydosaurus Gray in King, 1826 accepted as Chlamydosaurus Gray, 1825
- Genus Chlamydosaurus Gray, 1825
- Genus Clamydosaurus Gray, 1825 accepted as Chlamydosaurus Gray, 1825
- Genus Colotes accepted as Calotes Cuvier, 1817
- Genus Complicitus Manthey & Grossmann, 1997 accepted as Calotes Cuvier, 1817
- Genus Conicodontosaurus Gilmore, 1943 †
- Genus Cophotis Peters, 1862
- Genus Coryphophylax Steindachner, 1867
- Genus Coryphophylax Fitzinger, 1861 accepted as Coryphophylax Steindachner, 1867
- Genus Cristidorsa Wang, Deepak, Datta-Roy, Lin, Jiang, Che & Siler in Wang et al., 2019
- Genus Crottyagama Hoser, 2014 accepted as Calotes Cuvier, 1817
- Genus Cryptagama Witten, 1984
- Genus Ctenophorus Fitzinger, 1843
- Genus Dallysaurus Hoser, 2014 accepted as Uromastyx Merrem, 1820
- Genus Daraninagama Hoser, 2014 accepted as Gonocephalus Kaup, 1825
- Genus Dendragama Doria, 1888
- Genus Denzeragama Hoser, 2014 accepted as Gonocephalus Kaup, 1825
- Genus Dicksmithsaurus Hoser, 2014 accepted as Uromastyx Merrem, 1820
- Genus Dilophyrus Gray, 1845
- Genus Diploderma Hallowell, 1860
- Genus Diporiphora Gray, 1842
- Genus Diporophora Agassiz, 1846 accepted as Diporiphora Gray, 1842
- Genus Diptychodera Böttger, 1893
- Genus Diptychodlia Romer, 1956 accepted as Hypsilurus Peters, 1867
- Genus Doongagama Hoser, 2014 accepted as Gonocephalus Kaup, 1825
- Genus Draci accepted as Draco Linnaeus, 1758
- Genus Draco Linnaeus, 1758
- Genus Dracontoidis Fitzinger, 1843
- Genus Draconus Rafinesque, 1815 accepted as Draco Linnaeus, 1758
- Genus Dracunculus Wiegmann, 1834
- Genus Edwardssaurus Hoser, 2014 accepted as Uromastyx Merrem, 1820
- Genus Eksteinagama Hoser, 2014 accepted as Japalura Gray, 1853
- Genus Engannodraco Hoser, 2014 accepted as Draco Linnaeus, 1758
- Genus Epileolis Alifanov, 2020 †
- Genus Ferebronchocela Hoser, 2014 accepted as Bronchocela Kaup, 1827
- Genus Freudcalotes Hoser, 2014 accepted as Calotes Cuvier, 1817
- Genus Galeotes Boie in Schlegel, 1826
- Genus Gemmatophora Kaup, 1827
- Genus Ghatscalotes Hoser, 2014 accepted as Calotes Cuvier, 1817
- Genus Gindalia Gray, 1845
- Genus Goniocephalus Kaup, 1827 accepted as Gonocephalus Kaup, 1825
- Genus Gonocephalus Kaup, 1825
- Genus Gonycephalus Agassiz, 1846 accepted as Gonocephalus Kaup, 1825
- Genus Gonyocephalus Wagler, 1830 accepted as Gonocephalus Kaup, 1825
- Genus Gowidon Wells & Wellington, 1983 accepted as Lophognathus Gray, 1842
- Genus Grammathophora accepted as Grammatophora Duméril & Bibron, 1837
- Genus Grammatophora Duméril & Bibron, 1837
- Genus Harpesaurus Boulenger, 1885
- Genus Histiurus Wiegmann, 1834
- Genus Homalonotus Fitzinger, 1843 accepted as Ctenophorus Fitzinger, 1843
- Genus Honlamagama Hoser, 2014 accepted as Gonocephalus Kaup, 1825
- Genus Houstoniasaurus Wells & Wellington, 1985 accepted as Diporiphora Gray, 1842
- Genus Hydrosaurus Kaup, 1828
- Genus Hylagama Mertens, 1924
- Genus Hypsicalotes Manthey & Denzer, 2000
- Genus Hypsilurus Peters, 1867
- Genus Indiagama Rana, Augé, Folie, Rose, Kumar, Singh, Sahni & Smith, 2013 †
- Genus Intellagama Wells & Wellington, 1985 accepted as Physignathus Cuvier, 1829
- Genus Istiturus accepted as Istiurus Cuvier, 1829
- Genus Istiurus Cuvier, 1829
- Genus Jackyhosersaur Hoser, 2013 accepted as Diporiphora Gray, 1842
- Genus Jackyindigoea Hoser, 2012 accepted as Laudakia Gray, 1845
- Genus Jamesschulteus Hoser, 2014 accepted as Ceratophora Gray, 1832-35
- Genus Japalura Gray, 1853
- Genus Khasicalotes Hoser, 2014 accepted as Calotes Cuvier, 1817
- Genus Laccadivecalotes Hoser, 2014 accepted as Calotes Cuvier, 1817
- Genus Laudakia Gray, 1845
- Genus Lecolepis Gray, 1831 accepted as Leiolepis Cuvier, 1829
- Genus Leilolepis Bonaparte, 1831 accepted as Leiolepis Cuvier, 1829
- Genus Leiolepis Cuvier, 1829
- Genus Licentia Wells & Wellington, 1983 accepted as Ctenophorus Fitzinger, 1843
- Genus Liolepis Agassiz, 1846 accepted as Leiolepis Cuvier, 1829
- Genus Litana accepted as Sitana Cuvier, 1829
- Genus Lophocalotes Günther, 1873
- Genus Lophognathus Gray, 1842
- Genus Lophosalea Beddome, 1878
- Genus Lophosaurus Fitzinger, 1843
- Genus Lophosteus Peters & Doria, 1878 accepted as Hypsilurus Peters, 1867
- Genus Lophura Gray, 1827
- Genus Lyriocephalus Merrem, 1820
- Genus Lyrocephalus Wagler, 1830 accepted as Lyriocephalus Merrem, 1820
- Genus Macguiredraco Hoser, 2014 accepted as Draco Linnaeus, 1758
- Genus Macrops de Vis, 1884
- Genus Manamendraarachchius Hoser, 2014 accepted as Ceratophora Gray, 1832-35
- Genus Mantheyagama Hoser, 2014 accepted as Gonocephalus Kaup, 1825
- Genus Mantheyus Ananjeva & Stuart, 2001
- Genus Mantichorasaurus Wells & Wellington, 1983 accepted as Diporiphora Gray, 1842
- Genus Mecolepis Duméril, 1851
- Genus Megalochilus Eichwald, 1831
- Genus Microauris Pal, Vijayakumar, Shanker, Jayarajan & Deepak, 2018
- Genus Mictopholis Smith, 1935
- Genus Mindatagama Hoser, 2014 accepted as Ptyctolaemus Peters, 1865
- Genus Moloch Gray, 1841
- Genus Molochus Steindachner, 1867 accepted as Moloch Gray, 1841
- Genus Monilesaurus Pal, Vijayakumar, Shanker, Jayarajan & Deepak, 2018
- Genus Mooresaurus Hoser, 2014 accepted as Uromastyx Merrem, 1820
- Genus Newmansaurus Hoser, 2014 accepted as Uromastyx Merrem, 1820
- Genus Notacalotes Hoser, 2014 accepted as Pseudocalotes Fitzinger, 1843
- Genus Olorenshawagama Hoser, 2014 accepted as Phoxophrys Hubrecht, 1881
- Genus Oreocalotes accepted as Oriocalotes Günther, 1864
- Genus Oreodeira Girard, 1857
- Genus Oreosaura Barabanov & Ananjeva, 2007 accepted as Phrynocephalus Kaup, 1827
- Genus Oriocalotes Günther, 1864
- Genus Oriotaris accepted as Oriotiaris Günther, 1864
- Genus Oriotiaris Günther, 1864
- Genus Otocryptis Wagler, 1830
- Genus Palaeochamaeleo Stefano, 1903 †
- Genus Paracalotes Bourret, 1939
- Genus Paralaudakia Baig, Wagner, Ananjeva & Böhme, 2012
- Genus Pelturagonia Mocquard, 1890
- Genus Pethiyagodaus Hoser, 2014 accepted as Ceratophora Gray, 1832-35
- Genus Petroplanis Fitzinger, 1843 accepted as Amphibolurus Wagler, 1830
- Genus Philippinedraco Hoser, 2014 accepted as Draco Linnaeus, 1758
- Genus Phoxophrys Hubrecht, 1881
- Genus Phrynocephalus Kaup, 1827
- Genus Phrynopsis Fitzinger, 1843
- Genus Phrysignathus Gray, 1845 accepted as Physignathus Cuvier, 1829
- Genus Phthanodon Wells & Wellington, 1983
- Genus Phyrignathus accepted as Physignathus Cuvier, 1829
- Genus Physignathus Cuvier, 1829
- Genus Physignatus accepted as Physignathus Cuvier, 1829
- Genus Physognathus Agassiz, 1846 accepted as Physignathus Cuvier, 1829
- Genus Pleurodontagama Borsuk-Bialynicka & Moody, 1984 †
- Genus Pogona Storr, 1982
- Genus Polylophus Fitzinger, 1843 accepted as Amphibolurus Wagler, 1830
- Genus Priscagama Borsuk-Bialynicka & Moody, 1984 †
- Genus Proboscisagama Hoser, 2014 accepted as Aphaniotis Peters, 1864
- Genus Protodraco Wagner, Stanley, Daza & Bauer, 2021 †
- Genus Psammophilus Fitzinger, 1843
- Genus Pseudocalotes Fitzinger, 1843
- Genus Pseudocophotis Manthey & Grossmann, 1997 accepted as Cophotis Peters, 1862
- Genus Pseudotinosaurus Alifanov, 1991 †
- Genus Pseudotrapelus Fitzinger, 1843
- Species Pseudotrapelus sinaita Moody, 1980 accepted as Pseudotrapelus sinaitus Heyden, 1827
- Species Pseudotrapelus sinaitus Heyden, 1827
- Genus Ptyctolaemus Peters, 1865
- Genus Rankinia Wells & Wellington, 1983
- Genus Redtenbacheria Steindachner, 1867
- Genus Rotundacryptus Wells & Wellington, 1985 accepted as Tympanocryptis Peters, 1863
- Genus Rubercalotes Hoser, 2014 accepted as Calotes Cuvier, 1817
- Genus Salea Gray, 1845
- Genus Saura Wagler, 1833
- Genus Sellio Latreille, 1801 accepted as Stellio Laurenti, 1768
- Genus Semiophorus Wagler, 1830
- Genus Semiphorus Gray, 1831
- Genus Sitana Cuvier, 1829
- Genus Skrijelus Hoser, 2014 accepted as Calotes Cuvier, 1817
- Genus Somniadraco Hoser, 2014 accepted as Draco Linnaeus, 1758
- Genus Spottydraco Hoser, 2014 accepted as Draco Linnaeus, 1758
- Genus Stellagama Baig, Wagner, Ananjeva & Böhme, 2012
- Genus Stellio Laurenti, 1768
- Genus Stellionus Rafinesque, 1815
- Genus Stokessaurus Hoser, 2014 accepted as Uromastyx Merrem, 1820
- Genus Sulcatidens Covacevich, Couper, Molnar, Witten & Young, 1990 †
- Genus Supremeuromastyx Hoser, 2014 accepted as Uromastyx Merrem, 1820
- Genus Suratagama Rana, Augé, Folie, Rose, Kumar, Singh, Sahni & Smith, 2013 †
- Genus Tachyon Wells & Wellington, 1985 accepted as Ctenophorus Fitzinger, 1843
- Genus Tamilnaducalotes Hoser, 2014 accepted as Calotes Cuvier, 1817
- Genus Thaumatorhynchus Parker, 1924
- Genus Tiare accepted as Tiaris Duméril & Bibron, 1837
- Genus Tiaris Duméril & Bibron, 1837
- Genus Tikris Macleay, 1884 accepted as Tiaris Duméril & Bibron, 1837
- Genus Tinosaurus Marsh, 1872 †
- Genus Trapelus Kaup, 1827
- Genus Tropicagama Melville, Ritchie, Chapple, Glor & Schulte, 2018
- Genus Tropidolepis Gray, 1830
- Genus Tympanocryptis Peters, 1863
- Genus Uromastix Merrem, 1820 accepted as Uromastyx Merrem, 1820
- Genus Uromastrix Gray, 1825 accepted as Uromastyx Merrem, 1820
- Genus Uromastyx Merrem, 1820
- Genus Uromasyx accepted as Uromastyx Merrem, 1820
- Genus Uxoriousauria Wells & Wellington, 1985 accepted as Pogona Storr, 1982
- Genus Vastanagama Prasad & Bajpai, 2008 †
- Genus Wittenagama Wells & Wellington, 1985 accepted as Amphibolurus Wagler, 1830
- Genus Xenagama Boulenger, 1895
- Family Aigialosauridae Kramberger, 1892 †
- Family Amphisbaenia (awaiting allocation)
- Family Amphisbaenia incertae sedis
- Family Amphisbaenidae Gray, 1865
- Family Anguidae Gray, 1825
- Family Anguimorpha incertae sedis
- Family Aniliidae Fitzinger, 1826
- Family Anilioidea incertae sedis †
- Family Anniellidae
- Family Anomalepidae
- Family Anomalophiidae †
- Family Anomochilidae
- Family Aprasiaidae Wells, 2007 accepted as Pygopodidae Boulenger, 1884
- Family Ardeosauridae Camp, 1923 †
- Family Arretosauridae Gilmore, 1943 †
- Family Atractaspididae
- Family Bainguidae Borsuk-Bialynicka, 1984 †
- Family Barbatteiidae Codrea, Venczel & Solomon, 2017 †
- Family Bavarisauridae Kuhn, 1961 †
- Family Bipedidae
- Family Blanidae Kearney, 2003
- Family Boidae Gray, 1825
- Family Bolyeridae accepted as Bolyeriidae
- Family Bolyeriidae
- Family Booidea incertae sedis †
- Family Borioteiioidea incertae sedis †
- Family Caenophidia (awaiting allocation)
- Family Carolinidae Borsuk-Bialynicka, 1985 †
- Family Carphodactylidae Kluge, 1967
- Family Chamaeleonidae Gray, 1825
- Family Chamaeleontidae
- Family Chamopsiidae Nydam, Caldwell & Fanti, 2010 †
- Family Changjiangosauridae Hou, 1976 †
- Family Colubridae Oppel, 1811
- Family Colubroidea (awaiting allocation)
- Family Contogeniidae Nydam & Fitzpatrick, 2009 †
- Family Cordylidae Gray, 1837
- Family Corytophanidae
- Family Crotalidae
- Family Crotaphytidae
- Family Cyclocoridae Weinell & Brown, 2017
- Family Cylindrophiidae Fitzinger, 1843
- Family Dactyloidae Fitzinger, 1843
- Family Dibamidae Boulenger, 1884
- Family Dinilysiidae Romer, 1956 †
- Family Diplodactylidae Underwood, 1954
- Family Diploglossidae Boucourt, 1873
- Family Dipsadidae Bonaparte, 1840
- Family Dolichosauridae Gervais, 1852 †
- Family Dorsetisauridae Hoffstetter, 1967 †
- Family Eichstaettisauridae Kuhn, 1958 †
- Family Elapidae Boié, 1827
- Family Eolacertidae Čerňanský & Smith, 2017 †
- Family Eoxantidae Alifanov, 1993 †
- Family Erycidae Bonaparte, 1825 †
- Family Erycinidae Kuhn, 1967 accepted as Boidae Gray, 1825
- Family Euposauridae Camp, 1923 †
- Family Gekkonidae Gray, 1825
- Family Gekkoolithidae Hirsch, 1996 †
- Family Gekkota incertae sedis
- Family Gerrhosauridae
- Family Globauridae Alifanov, 2000 †
- Family Gobiguania incertae sedis †
- Family Gymnophthalmidae Fitzinger, 1826
- Family Helodermatidae Gray, 1837
- Family Hoplocercidae
- Family Hydrophidae accepted as Hydrophiidae Smith, 1926
- Family Hydrophiidae Smith, 1926
- Family Hyporhinidae Baur, 1893 †
- Family Iguania incertae sedis
- Family Iguanidae Gray, 1827
- Family Isodontosauridae Alifanov, 1993 †
- Family Kuehneosauridae Romer, 1966 †
- Family Lacertibaenia incertae sedis †
- Family Lacertidae Bonaparte, 1831
- Family Lacertilia (awaiting allocation)
- Family Lacertoidea incertae sedis
- Family Lamprophiidae Fitzinger, 1843
- Family Lanthanotidae Steindachner, 1878
- Family Lanthonotidae
- Family Lapparantophiidae †
- Family Lapparentopheidae Hoffstetter, 1968 †
- Family Laticaudidae
- Family Leiosauridae
- Family Leptotyphlopidae Stejneger, 1892
- Family Loxocemidae
- Family Macrocephalosauridae Sulimski, 1975 †
- Family Macrostomata incertae sedis †
- Family Madstoiidae † accepted as Madtsoiidae Hoffstetter, 1961 †
- Family Madtsoiidae Hoffstetter, 1961 †
- Family Monstersauria incertae sedis †
- Family Mosasauria incertae sedis †
- Family Mosasauridae Gervais, 1853 †
- Family Necrosauridae Hoffstetter, 1943 †
- Family Nigerophiidae Rage, 1975 †
- Family Oligodontosauridae Estes, 1975 †
- Family Ophidia incertae sedis
- Family Opluridae
- Family Pachyophiidae Nopcsa, 1923 †
- Family Palaeopheidae Lydekker, 1888 † accepted as Palaeophiidae Lydekker, 1888 †
- Family Palaeophidae † accepted as Palaeophiidae Lydekker, 1888 †
- Family Palaeophiidae Lydekker, 1888 †
- Family Palaeovaranidae Georgalis, 2017 †
- Family Paliguanidae †
- Family Paramacellodidae Estes, 1983 †
- Family Parasaniwidae Estes, 1964 †
- Family Paravaranidae Borsuk-Bialynicka, 1984 †
- Family Pareatidae Romer, 1956 accepted as Pareidae Romer, 1956
- Family Pareidae Romer, 1956
- Family Phrynosomatidae
- Family Platynota incertae sedis
- Family Pleurodonta incertae sedis
- Family Polychrotidae
- Family Polyglyphanodontia incertae sedis †
- Family Polyglyphanodontidae Gilmore, 1942 †
- Family Polyodontobaenidae Folie, Smith & Smith, 2013 †
- Family Priscagamidae Borsuk-Białynicka & Moody, 1984 †
- Family Pygopodidae Boulenger, 1884
- Family Pythonidae Fitzinger, 1826 accepted as Boidae Gray, 1825
- Family Rhineuridae Vanzolini, 1951 †
- Family Russelophiidae †
- Family Sauria (awaiting allocation)
- Family Saurosternidae Haughton, 1924 †
- Family Scincidae Gray, 1825
- Family Scincogekkonomorpha incertae sedis
- Family Scincoidea (awaiting allocation)
- Family Scincoidea incertae sedis
- Family Scincomorpha incertae sedis
- Family Scleroglossa incertae sedis
- Family Serpentes (awaiting allocation)
- Family Serpentes incertae sedis †
- Family Shinisauridae Ahl, 1930
- Family Simoliophiidae †
- Family Sphaerodactylidae Underwood, 1954
- Family Squamata (awaiting allocation)
- Family Teiidae Gray, 1827
- Family Trogonophidae Bonaparte, 1838
- Family Trogonophiidae accepted as Trogonophidae Bonaparte, 1838
- Family Tropidophiidae Cope, 1894
- Family Tropiduridae
- Family Typhlopidae Bonaparte, 1831
- Family Uropeltidae
- Family Varanidae Hardwicke & Gray, 1824
- Family Varanoidea incertae sedis
- Family Viperidae Oppel, 1811
- Family Xantusiidae Baird, 1858
- Family Xenodermidae Gray, 1849
- Family Xenopeltidae Bonaparte, 1845
- Family Xenosauridae Cope, 1866
- Genus Aiolosaurus Gao & Norell, 2000 †
- Genus Baabdasaurus Arnold, Azar, Ineich & Nel, 2002 †
- Genus Bharatagama Evans, Prasad & Manhas, 2002 †
- Genus Bothriagenys Nydam, 2002 †
- Genus Conantophis Holman & Harrison, 2000 †
- Genus Cryptovaranoides Whiteside, Chambi-Trowell & Benton, 2022 †
- Genus Ctenomastax Gao & Norell, 2000 †
- Genus Dimekodontosaurus Nydam, 2002 †
- Genus Haasiophis Tchernov, Rieppel, Zaher, Polcyn & Jacobs, 2000 †
- Genus Hongshanxi Dong, Wang, Mou, Zhang & Evans, 2019 †
- Genus Hydrargysaurus Wick & Shiller, 2020 †
- Genus Hymenosaurus Gao & Norell, 2000 †
- Genus Indrasaurus O'Connor, Zheng, Dong, Wang, Wang, Zhang & Zhou, 2019 †
- Genus Jucaraseps Bolet & Evans, 2012 †
- Genus Megachirella Renesto & Posenato, 2003 †
- Genus Messelopython Zaher & Smith, 2020 †
- Genus Moqisaurus Dong, Wang & Evans, 2022 †
- Genus Myrmecodaptria Gao & Norell, 2000 †
- Genus Paleochelco Martinelli, Agnolín & Ezcurra, 2021 †
- Genus Parasaurillus Evans & Searle, 2002 †
- Genus Primaderma Nydam, 2000 †
- Genus Sauripes Lee, Lee, Fiorillo & Lü, 2018 †
- Genus Schillerosaurus Nydam, Chure & Evans, 2013 †
- Genus Temujinia Gao & Norell, 2000 †
- Genus Zapsosaurus Gao & Norell, 2000 †
- Order Synapsida (awaiting allocation)
- Order Synaptosauria (awaiting allocation) †
- Order Testudinata incertae sedis
- Order Testudines
- Order Tetrapodamorpha incertae sedis †
- Order Thalattosauria †
- Order Thalattosuchia †
- Order Thecodontia †
- Order Therapsida †
- Order Theriodontia †
- Order Trilophosauria †
- Order Younginiformes †
- Family Gracilisuchidae Butler, Sullivan, Ezcurra, Liu, Lecuona & Sookias, 2014 †
- Genus Anshunpes Xing, Klein, Lockley, Wu, Benton, Zeng & Romilio, 2020 †
- Genus Antarcticoolithus Legendre, Rubilar-Rogers, Musser, Davis, Otero, Vargas & Clarke, 2020 †
- Genus Archaeoraptor Sloan, 1999 †
- Genus Brittagnathus Ahlberg & Clack, 2020 †
- Genus Diploradus Clack & Smithson in Clack et al., 2017 †
- Genus Mesanerpeton Smithson & Clack, 2018 †
- Genus Ossirarus Clack & Smithson in Clack et al., 2017 †
- Genus Parmastega Beznosov, Clack, Lukševičs, Ruta & Ahlberg, 2019 †
- Genus Perittodus Clack & Smithson in Clack et al., 2017 †
- Genus Sigournea Bolt & Lombard, 2006 †
- Genus Tantallognathus Chen, Alavi, Brazeau, Blom, Millward & Ahlberg, 2017 †
- Genus Tutusius Gess & Ahlberg, 2018 †
- Genus Umzantsia Gess & Ahlberg, 2018 †
- Class Acanthodii †
- Class Actinopterygii
- Class Agnatha (awaiting allocation)
- Class Cephalaspidomorphi
- Class Chondrichthyes
- Class Conodonta †
- Class Dipnoi
- Class Dipnomorpha accepted as Dipnoi
- Class Galeaspida †
- Class Gnathostomata incertae sedis †
- Class Myxini
- Class Osteichthyes (awaiting allocation)
- Class Osteichthyes incertae sedis †
- Class Ostracodermi †
- Class Pisces (awaiting allocation)
- Class Placodermi †
- Class Pteraspidomorphi †
- Class Sarcopterygii
- Class Thelodonti †
- Genus Emmonsaspis Resser & Howell, 1938 †
- Genus Harajicadectes Choo, Holland, Clement, King, Challands, Young & Long, 2024 †
- Genus Kahamachli Malkani, 2019 †
- Genus Nuucichthys Lerosey-Aubril & Ortega-Hernández, 2024 †
- Genus Rhynchocopros Hunt, Lucas & Spielmann, 2013 †
- Genus Santamariacopros Hunt, Lucas & Spielmann, 2013 †
- Genus Squirmarius McCoy, Wittry, Sadabadi & Mayer, 2023 †
- Class Chordata (awaiting allocation)
- Class Eotetrapodiformes incertae sedis
- Phylum Cnidaria
- Phylum Ctenophora
- Phylum Cycliophora
- Phylum Cycloneuralia incertae sedis
- Phylum Ecdysozoa incertae sedis †
- Phylum Echinodermata
- Phylum Entoprocta
- Phylum Gastrotricha
- Phylum Gnathostomulida
- Phylum Hemichordata
- Phylum Hyolitha †
- Phylum Kinorhyncha
- Phylum Lobopoda †
- Phylum Loricifera
- Phylum Micrognathozoa
- Phylum Mollusca
- Phylum Monoblastozoa accepted as Animalia incertae sedis
- Phylum Nematoda
- Phylum Nematomorpha
- Phylum Nemertea
- Phylum Onychophora
- Phylum Orthonectida
- Phylum Phoronida
- Phylum Placozoa
- Phylum Platyhelminthes
- Phylum Pogonophora accepted as Siboglinidae Caullery, 1914
- Phylum Porifera
- Phylum Priapula accepted as Priapulida
- Phylum Priapulida
- Phylum Problematica † accepted as Animalia incertae sedis
- Phylum Rhombozoa
- Phylum Rotifera
- Phylum Scalidophora incertae sedis
- Phylum Sipuncula
- Phylum Tardigrada
- Phylum Trace fossils †
- Phylum Vendobionta †
- Phylum Vestimentifera accepted as Siboglinidae Caullery, 1914
- Phylum Vetulicolia †
- Phylum Vinctiplicata incertae sedis †
- Phylum Xenacoelomorpha
- Genus Trilobocaris Pribyl, 1953 †
- Kingdom Archaea
- Kingdom Bacteria
- Kingdom Chromista
- Kingdom Fungi
- Kingdom Plantae
- Kingdom Protista accepted as Protozoa
- Kingdom Protozoa
- Kingdom Viruses
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