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
- 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
- Genus Abastor Gray, 1849
- Genus Ablabes Duméril, 1853
- Genus Ablabophis Boulenger, 1893
- Genus Ablates Beddome, 1862
- Genus Achaetula Gray, 1832-35
- Genus Achalinopsis Steindachner, 1913
- Genus Acontiophis Günther, 1875
- Genus Acrophis accepted as Agrophis Müller, 1895
- Genus Adelophis Cope, 1879
- Genus Adelphicos Jan, 1862
- Genus Adelphicus accepted as Adelphicos Jan, 1862
- Genus Adiastema Werner, 1925
- Genus Aehoetulla Gray, 1834
- Genus Aeluroglena Boulenger, 1898
- Genus Aepidea Hallowell, 1860
- Genus Afronatrix Rossman & Eberle, 1977
- Genus Agrophis Müller, 1895
- Genus Ahaetula Gray, 1832-35
- Genus Ahaetulla Link, 1807
- Genus Aiselfakharius Hoser, 2012 accepted as Salvadora Baird & Girard, 1853
- Genus Alanbrygelus Hoser, 2012 accepted as Tropidonophis Jan, 1863
- Genus Alexteesus Hoser, 2012 accepted as Rhadinaea Cope, 1863
- Genus Alleidophis Prado, 1939
- Genus Allophis Peters, 1872
- Genus Alluaudina Mocquard, 1894
- Genus Alopecion Duméril, 1853
- Genus Alopecophis Gray, 1849
- Genus Alsophis Fitzinger, 1843
- Genus Amastridium Cope, 1860
- Genus Amblycephalus Boie, 1827
- Genus Amblymetopon Günther, 1858
- Genus Ameiseophis Holman, 1977 †
- Genus Amnesteophis Myers, 2011
- Genus Amphiesma Duméril & Bibron, 1854
- Genus Amphiesmoides Malnate, 1961
- Genus Amphiophis Barboza de Bocage, 1872
- Genus Amphistrate Goldfuss, 1820 accepted as Langaha Bruguière, 1784
- Genus Amplorhinus Smith, 1847
- Genus Amplycephalus Kuhl, 1822
- Genus Analcis Wagler, 1830 accepted as Dasypeltis Wagler, 1830
- Genus Anholodon Duméril & Bibron, 1854
- Genus Anisodon Rosen, 1905
- Genus Anisodontes Rosen, 1905
- Genus Anodon Smith, 1829 accepted as Dasypeltis Wagler, 1830
- Genus Anoplodipsas Peters, 1869
- Genus Anoplohydrus Werner, 1909
- Genus Anoplophallus Cope, 1893
- Genus Anoplorhinus accepted as Amplorhinus Smith, 1847
- Genus Antillophis Maglio, 1970
- Genus Apollopierson Hoser, 2014 accepted as Lycodon Fitzinger, 1826
- Genus Aporophis Cope, 1877
- Genus Apostolepis Cope, 1861
- Genus Aproaspidops Annandale, 1912
- Genus Aprosdoketophis Wallach, Lanza & Nistri, 2010
- Genus Aproterodon
- Genus Arcanumophis Smaga, Ttito & Catenazzi, 2019
- Genus Archelaphe Schulz, Böhme & Tillack, 2011
- Genus Archerpeton Carroll, 1964 †
- Genus Argyrogena Werner, 1924
- Genus Arizona Kennicott, 1859
- Genus Arrhyton Günther, 1858
- Genus Asianatrix Hoser, 2012 accepted as Amphiesma Duméril & Bibron, 1854
- Genus Aspidura Wagler, 1830
- Genus Asthenophis Boulenger, 1896
- Genus Atomarchus Cope, 1883
- Genus Atomophis Cope, 1887
- Genus Atractus Wagler, 1828
- Genus Atretium Cope, 1861
- Genus Avonlovellus Hoser, 2013 accepted as Gongylosoma Fitzinger, 1843
- Genus Balanophis Smith, 1938
- Genus Bamanophis Schaetti & Trape, 2008
- Genus Barbourina Amaral, 1924
- Genus Barrygoldsmithus Hoser, 2012 accepted as Rhadinaea Cope, 1863
- Genus Bascanicum accepted as Bascanium Cope, 1862
- Genus Bascanion Baird & Girard, 1853
- Genus Bascanium Cope, 1862
- Genus Bergenia Steindachner, 1867
- Genus Bibilava Glaw, Nagy, Franzen & Vences, 2007
- Genus Bitia Gray, 1842
- Genus Bitia Gray, 1840
- Genus Blythea Theobald, 1876 accepted as Blythia Theobald, 1868
- Genus Blythia Theobald, 1868
- Genus Boaedon Duméril & Bibron, 1854
- Genus Boaodon Chabanaud, 1916
- Genus Bogertophis Dowling & Price, 1988
- Genus Boiga Fitzinger, 1826
- Genus Boiruna Zaher, 1996
- Genus Boodon Günther, 1858
- Genus Bothrolycus Günther, 1874
- Genus Bothrophthalmus Peters, 1863
- Genus Brachyorrhos Kuhl in Férussac, 1826
- Genus Brachyorrhus Kuhl, 1826 accepted as Brachyorrhos Kuhl in Férussac, 1826
- Genus Brachyrruton Duméril, 1853
- Genus Brachyruton Duméril & Bibron, 1854
- Genus Brachyura Kuhl & Hasselt, 1822
- Genus Brucegowus Hoser, 2013 accepted as Dendrelaphis Boulenger, 1890
- Genus Brucerogersus Hoser, 2012 accepted as Thamnophis Fitzinger, 1843
- Genus Brygophis Domergue & Bour, 1989
- Genus Bucephalus Smith, 1829
- Genus Buhoma Ziegler, Vences, Glaw & Bohme, 1997
- Genus Caaeteboia Zaher, Grazziotin, Cadle, Murphy, de Moura-Leite & Bonatto, 2009
- Genus Caelopeltis Bonaparte, 1841
- Genus Calamaria Boie, 1826
- Genus Calamaria Boie in Férussac, 1826, nom. nud. accepted as Calamaria Boie, 1826
- Genus Calamodon Amaral, 1935
- Genus Calamodontophis Amaral, 1963
- Genus Calamohydrus Boulenger, 1888
- Genus Calamorhabdium Böttger, 1898
- Genus Callipelta Agassiz, 1846 accepted as Callopeltis Bonaparte, 1841
- Genus Callirhinus Girard, 1857
- Genus Callopeltis Bonaparte, 1841
- Genus Callopisma Duméril, 1853
- Genus Calopeltis Fitzinger, 1843
- Genus Calopisma Duméril & Bibron, 1854
- Genus Campylodon Duméril, 1853
- Genus Cantonophis Werner, 1909
- Genus Cantoria Girard, 1857
- Genus Caraiba Zaher, Grazziotin, Cadle, Murphy, de Moura-Leite & Bonatto, 2009
- Genus Carophophis accepted as Carphophis Gervais in d'Orbigny, 1840
- Genus Carphophiops Gervais in d'Orbigny, 1840
- Genus Carphophis Gervais in d'Orbigny, 1840
- Genus Carphoptis Cope, 1862 accepted as Carphophis Gervais in d'Orbigny, 1840
- Genus Carpophis Duméril, 1853 accepted as Carphophis Gervais in d'Orbigny, 1840
- Genus Carstensus Hoser, 2013 accepted as Atractus Wagler, 1828
- Genus Catachlaena Blanford, 1881
- Genus Catostoma Wagler, 1830 accepted as Geophis Wagler, 1830
- Genus Celata accepted as Celuta Baird & Girard, 1853
- Genus Celuta Baird & Girard, 1853
- Genus Cemophora Cope, 1860
- Genus Cerberus Cuvier, 1829
- Genus Cercaspis Wagler, 1830
- Genus Cercophis Fitzinger, 1843
- Genus Cerebus Swainson, 1839 accepted as Cerberus Cuvier, 1829
- Genus Chamaelycus Boulenger, 1919
- Genus Chamaetortus Günther, 1864
- Genus Changulia Gray, 1832-35
- Genus Chapinophis Campbell & Smith, 1998
- Genus Charlespiersonserpens Hoser, 2012 accepted as Dendrelaphis Boulenger, 1890
- Genus Chatachlein Jan, 1862
- Genus Chersodromus Reinhardt, 1860
- Genus Chilomeniscus Cope, 1860
- Genus Chionactis Cope, 1860
- Genus Chironius Fitzinger, 1826
- Genus Chlonophis accepted as Clonophis Cope, 1889
- Genus Chlorophis Hallowell, 1857
- Genus Chlorophis Theobald, 1868
- Genus Chlorosoma Wagler, 1830
- Genus Chorisodon Duméril, 1853
- Genus Chotaophis Head, 2005 †
- Genus Chrismaxwellus Hoser, 2013 accepted as Hemerophis Schätti & Utiger, 2001
- Genus Chrisnewmanus Hoser, 2013 accepted as Liopholidophis Mocquard, 1904
- Genus Chrysochlora accepted as Chrysopelea Boie in Férussac, 1826
- Genus Chrysopelea Boie in Férussac, 1826
- Genus Chrysopelia Schlegel, 1827 accepted as Chrysopelea Boie in Férussac, 1826
- Genus Clelia Fitzinger, 1826
- Genus Cloelia Wagler, 1830 accepted as Clelia Fitzinger, 1826
- Genus Clonophis Cope, 1889
- Genus Clorophis accepted as Chlorophis Hallowell, 1857
- Species Clorophis neglectus Boulenger, 1894 accepted as Philothamnus hoplogaster Günther, 1863
- Genus Cochliophagus Duméril & Bibron, 1854
- Genus Coelognathus Fitzinger, 1843
- Genus Coelopeltis Wagler, 1830
- Genus Collaria Dotsenko, 1989 accepted as Eirenis Jan, 1862
- Genus Collorhabdium Smedley, 1932
- Genus Colobognathus Peters, 1859
- Genus Colophrys Cope, 1868
- Genus Colorhogia Cope, 1862
- Genus Coluber Linnaeus, 1758
- Genus Colubroelaps Orlov, Kharin, Ananjeva, Nguyen & Nguyen, 2009
- Genus Comastes Jan, 1863
- Genus Composoma accepted as Elaphe Fitzinger in Wagler, 1832
- Genus Compsophis Mocquard, 1894
- Genus Compsosoma Duméril, 1853 accepted as Elaphe Fitzinger in Wagler, 1832
- Genus Coniophanes Cope, 1860
- Genus Conocephalus Duméril & Bibron, 1854
- Genus Conophis Peters, 1860
- Genus Conopsis Günther, 1858
- Genus Contia Baird & Girard, 1853
- Genus Coronella Laurenti, 1768
- Genus Coryphodon Duméril & Bibron, 1854
- Genus Cottonkukri Hoser, 2012 accepted as Oligodon Boie in Férussac, 1826
- Genus Cottonserpens Hoser, 2012 accepted as Coniophanes Cope, 1860
- Genus Crisantophis Villa, 1971
- Genus Crossmanus Hoser, 2012 accepted as Leptodeira Fitzinger, 1843
- Genus Crotaphopeltis Fitzinger, 1843
- Genus Crottykukrius Hoser, 2012 accepted as Oligodon Boie in Férussac, 1826
- Genus Crottyreedus Hoser, 2012 accepted as Calamaria Boie, 1826
- Genus Cryophis Bogert & Duellman, 1963
- Genus Crypsidomus Günther, 1864 accepted as Rhamnophis Günther, 1862
- Genus Cryptodacus Gundlach in Peters, 1862
- Genus Cryptolycus Broadley, 1968
- Genus Cryptophidion Wallach & Jones, 1992
- Genus Cyclagigas accepted as Hydrodynastes Fitzinger, 1843
- Genus Cyclagras Cope, 1885
- Genus Cyclophiops Boulenger, 1888
- Genus Cyclophis Günther, 1858
- Genus Cynophis Gray, 1849
- Genus Dakaria Werner, 1925
- Genus Dakotaophis Holman, 1976 †
- Genus Dannycoleus Hoser, 2013 accepted as Dendrelaphis Boulenger, 1890
- Genus Dannyelfakharikukri Hoser, 2012 accepted as Oligodon Boie in Férussac, 1826
- Genus Daraninserpens Hoser, 2012 accepted as Coniophanes Cope, 1860
- Genus Darlingtonia Cochran, 1935
- Genus Dasypeltis Wagler, 1830
- Genus Daviekukri Hoser, 2012 accepted as Oligodon Boie in Férussac, 1826
- Genus Deirodon Owen, 1841 accepted as Dasypeltis Wagler, 1830
- Genus Dendorophis accepted as Leptophis Bell, 1825
- Genus Dendrelaphis Boulenger, 1890
- Genus Dendrolycus Laurent, 1956
- Genus Dendrophidion Fitzinger, 1843
- Genus Dendrophidium Agassiz, 1846 accepted as Dendrophidion Fitzinger, 1843
- Genus Dendrophis Fitzinger, 1826 accepted as Leptophis Bell, 1825
- Genus Desburkeus Hoser, 2012 accepted as Tropidonophis Jan, 1863
- Genus Desmondburkeus Hoser, 2012 accepted as Rhadinaea Cope, 1863
- Genus Diadophis Baird & Girard, 1853
- Genus Dianodon Cope, 1893 accepted as Dinodon Duméril, 1853
- Genus Diaphorolepis Jan, 1863
- Genus Dicraulax Cope, 1893
- Genus Dieurostus Berg, 1901
- Genus Dimades Gray, 1842
- Genus Dinodon Duméril, 1853
- Genus Dipeltophis Cope, 1887
- Genus Diplotropis Günther, 1872
- Genus Dipsadoboa Günther, 1858
- Genus Dipsadoides Annandale, 1905
- Genus Dipsadomorphus Fitzinger, 1843
- Genus Dipsadomorus Duméril & Bibron, 1854
- Genus Dipsadophidium Lindholm, 1905
- Genus Dipsas Laurenti, 1768
- Genus Dipsina Jan, 1862
- Genus Dipsodomorphus accepted as Dipsadomorphus Fitzinger, 1843
- Genus Dipsodomorus accepted as Dipsadomorphus Fitzinger, 1843
- Genus Dirodon Agassiz, 1846
- Genus Dirosema Boulenger, 1894
- Genus Dirrhox Cope, 1887
- Genus Dispholidus Duvernoy, 1832
- Genus Ditaxodon Hoge, 1958
- Genus Ditypophis Günther, 1881
- Genus Djokoiskandarus Murphy, 2011
- Genus Dolichophis Gistl, 1868
- Genus Dolniceophis Rage & Rocek, 1983 †
- Genus Dorisious Hoser, 2012 accepted as Boiga Fitzinger, 1826
- Genus Downieea Hoser, 2012 accepted as Dendrelaphis Boulenger, 1890
- Genus Drepanodon Peracca, 1896
- Genus Drepanoides Dunn, 1928
- Genus Drewwilliamsus Hoser, 2013 accepted as Atractus Wagler, 1828
- Genus Dromicodryas Boulenger, 1893
- Genus Dromicus Cocteau & Bibron in Sagra, 1843
- Genus Dromophis Peters, 1869
- Genus Dryadophis Stuart, 1939
- Genus Dryinoides Auffenberg, 1958 †
- Genus Dryinus Merrem, 1820
- Genus Dryiophis Dalman in Férussac, 1826
- Genus Drymarchon Fitzinger, 1843
- Genus Drymobius Fitzinger, 1843
- Genus Drymoluber Amaral, 1929
- Genus Drynius accepted as Dryinus Merrem, 1820
- Genus Dryocalamus Günther, 1858
- Genus Dryomelictes Fitzinger, 1843
- Genus Dryophiops Boulenger, 1896
- Genus Dryophis Dalman, 1823 accepted as Ahaetulla Link, 1807
- Genus Dryophis Fitzinger, 1826
- Genus Dryophylax Wagler, 1830
- Genus Duberia accepted as Duberria Fitzinger, 1826
- Genus Duberria Fitzinger, 1826
- Genus Dudleyserpens Hoser, 2012 accepted as Rhadinaea Cope, 1863
- Genus Dystyches Gistl, 1848
- Genus Echinanthera Cope, 1894
- Genus Eipperus Hoser, 2012 accepted as Psammophis Fitzinger, 1826
- Genus Eirenis Jan, 1862
- Genus Eksteinus Hoser, 2012 accepted as Lampropeltis Fitzinger, 1843
- Genus Elachistodon Reinhardt, 1863
- Genus Elaphe Fitzinger in Wagler, 1832
- Genus Elaphis Bonaparte, 1831
- Genus Elapochorus accepted as Elapochrus Peters, 1860
- Genus Elapochrus Peters, 1860
- Genus Elapodis Boie in Férussac, 1826
- Genus Elapohomoeus Berg, 1899
- Genus Elapoides Jan, 1862
- Genus Elapoidis Boie, 1827
- Genus Elapoïdis Boie, 1827 accepted as Elapoidis Boie, 1827
- Genus Elapomohoeus accepted as Elapomoius Boulenger, 1896
- Genus Elapomoius Boulenger, 1896
- Genus Elapomojus Jan, 1862
- Genus Elapomorphus Fitzinger, 1843
- Genus Elliottnatrix Hoser, 2012 accepted as Amphiesma Duméril & Bibron, 1854
- Genus Elliottus Hoser, 2012 accepted as Psammophis Fitzinger, 1826
- Genus Eminophis Werner, 1924
- Genus Emmochliophis Fritts & Smith, 1969
- Genus Enhydris Latreille, 1801
- Genus Enhydrus Rafinesque, 1815 accepted as Enhydris Latreille, 1801
- Genus Enicognathus Duméril & Bibron, 1854
- Genus Entacanthus Cope, 1900
- Genus Entechinus Cope, 1895
- Genus Enuliophis McCranie & Villa, 1993
- Genus Enulius Cope, 1870
- Genus Enydris Ritgen, 1828 accepted as Enhydris Latreille, 1801
- Genus Eoseirenis Nagy, Schmidtler, Joger & Wink, 2003 accepted as Eirenis Jan, 1862
- Genus Epimones Gistl, 1848 accepted as Erythrolamprus Boie, 1826
- Genus Eremiophis Fitzinger, 1843
- Genus Eremophis Gistl, 1848
- Genus Eridiphas Leviton & Tanner, 1960
- Genus Erpetodryas Boie in Férussac, 1826
- Genus Erpeton Lacepède, 1801
- Genus Erpetrodryas Wagler, 1830
- Genus Erythrolamprus Boie, 1826
- Genus Erythrolampus accepted as Erythrolamprus Boie, 1826
- Genus Erytrolamprus accepted as Erythrolamprus Boie, 1826
- Genus Eteirodipsas Jan, 1863
- Genus Etheridgeum Wallach, 1988
- Genus Euanedwardsserpens Hoser, 2012 accepted as Coelognathus Fitzinger, 1843
- Genus Eudipsas Fitzinger, 1843
- Genus Eudryas Fitzinger, 1843 accepted as Dryadophis Stuart, 1939
- Genus Eugnathus Duméril & Bibron, 1854
- Genus Eumesodon Cope, 1860
- Genus Euprepiophis Fitzinger, 1843
- Genus Europhrys
- Genus Eurostus Duméril, 1853
- Genus Eurotus accepted as Eurostus Duméril, 1853
- Genus Eurypholis Hallowell, 1860
- Genus Eutaenia Cope, 1866
- Genus Eutainia Baird & Girard, 1853
- Genus Eutanaeia accepted as Eutaenia Cope, 1866
- Genus Eutrachelophis Myers & McDowell, 2014
- Genus Exallodontophis Cadle, 1999
- Genus Exelencophis Smith, 1942
- Genus Falconeria Theobald, 1868
- Genus Farancia Gray, 1842
- Genus Ferania Gray, 1842
- Genus Feranioides Carlleyle, 1869
- Genus Feranoides Boulenger, 1896
- Genus Ficimia Gray, 1849
- Genus Fleischmannia Böttger, 1898
- Genus Fordonia Gray, 1842
- Genus Fowlea Theobald, 1868
- Genus Freudreedus Hoser, 2012 accepted as Calamaria Boie, 1826
- Genus Funkiacrochordus Hoser, 2014 accepted as Acrochordus Hornstedt, 1787
- Genus Funkikukri Hoser, 2012 accepted as Oligodon Boie in Férussac, 1826
- Genus Funkus Hoser, 2012 accepted as Nerodia Baird & Girard, 1853
- Genus Galedon Jan, 1863
- Genus Galeophis Berthold, 1859
- Genus Gansophis Head, 2005 †
- Genus Gastropyxis Cope, 1861
- Genus Geagras Cope, 1876
- Genus Geatractus Dugès, 1898
- Genus Geddykukrius Hoser, 2012 accepted as Oligodon Boie in Férussac, 1826
- Genus Geleophis accepted as Galeophis Berthold, 1859
- Genus Genhosteus Cope, 1874
- Genus Geodipsas Boulenger, 1896
- Genus Geophidium Peters, 1862
- Genus Geophis Wagler, 1830
- Genus Geoptyas Steindachner, 1867
- Genus Georgia Baird & Girard, 1853
- Genus Gerarda Gray, 1849
- Genus Gerardia accepted as Gerarda Gray, 1849
- Genus Gerrhosteus Cope, 1874
- Genus Ginafabaserpenae Hoser, 2012 accepted as Leptodeira Fitzinger, 1843
- Genus Glaphyrophis Jan, 1862
- Genus Glypholycus Günther, 1894
- Genus Gomesophis Hoge & Mertens, 1959
- Genus Gongylosoma Fitzinger, 1843
- Genus Gonionotus Gray in Stokes, 1846
- Genus Gonyasoma Wagler, 1828 accepted as Gonyosoma Wagler, 1828
- Genus Gonyophis Boulenger, 1891
- Genus Gonyosoma Wagler, 1828
- Genus Gonysoma Agassiz, 1846 accepted as Gonyosoma Wagler, 1828
- Genus Graya accepted as Grayia Günther, 1858
- Genus Grayia Günther, 1858
- Genus Greernatrix Hoser, 2012 accepted as Amphiesma Duméril & Bibron, 1854
- Genus Gregswedoshus Hoser, 2012 accepted as Thamnophis Fitzinger, 1843
- Genus Grobbenia Poche, 1903 accepted as Mehelya Csiki, 1903
- Genus Grotea Theobald, 1868
- Genus Guystebbinsus Hoser, 2012 accepted as Natrix Laurenti, 1768
- Genus Gyalopion Cope, 1860
- Genus Gyalopium Cope, 1863 accepted as Gyalopion Cope, 1860
- Genus Gyiophis Murphy & Voris, 2014
- Genus Haemorrbois accepted as Hemorrhois Boie, 1826
- Genus Haemorrhois Agassiz, 1844 accepted as Hemorrhois Boie, 1826
- Genus Haldea Baird & Girard, 1853
- Genus Halsophis Cope, 1894 accepted as Alsophis Fitzinger, 1843
- Genus Haplocercus Günther, 1858
- Genus Haplonodon Griffin, 1910
- Genus Hapsidophrys Fischer, 1856
- Genus Hapsidrophis Reichenow, 1874 accepted as Hapsidophrys Fischer, 1856
- Genus Harrigankukriae Hoser, 2012 accepted as Oligodon Boie in Férussac, 1826
- Genus Heleophis Müller, 1884
- Genus Helicops Wagler, 1828
- Genus Helicopsoides Mocquard, 1890
- Genus Helophis de Witte & Laurent, 1942
- Genus Hemerophis Schätti & Utiger, 2001
- Genus Hemiodontus Duméril, 1853
- Genus Hemirhagerrhis Böttger, 1893
- Genus Hemirhargerris accepted as Hemirhagerrhis Böttger, 1893
- Genus Hemirrhagerrhis accepted as Hemirhagerrhis Böttger, 1893
- Genus Hemirrhaggeris accepted as Hemirhagerrhis Böttger, 1893
- Genus Hemorrhois Boie, 1826
- Genus Henicognathus Cope, 1876
- Genus Herbertophis Macleay, 1884
- Genus Herpetodryas Schlegel, 1837
- Genus Herpetodrys Wagler, 1830
- Genus Herpeton Wagler, 1830 accepted as Erpeton Lacepède, 1801
- Genus Herpetoreas Günther, 1860
- Genus Herpetrodryas accepted as Herpetodryas Schlegel, 1837
- Genus Herpetum Agassiz, 1846 accepted as Erpeton Lacepède, 1801
- Genus Hetaerodipsas Berg, 1901
- Genus Heterodon Latreille, 1801
- Genus Heterolepis Smith, 1847
- Genus Heteroliodon Böttger in Voeltzkow, 1913
- Genus Heterorhachis Amaral, 1923
- Genus Heterurus Duméril, 1853
- Genus Hetorodon Latreille in Sonnini, 1802 accepted as Heterodon Latreille, 1801
- Genus Heurnia Jong, 1926
- Genus Hierophis Bonaparte, 1834
- Genus Himantodes Cope, 1860 accepted as Imantodes Duméril, 1853
- Genus Hipistes Gray, 1849
- Genus Hispanophis Szyndlar, 1985 †
- Genus Holarchus Cope, 1886
- Genus Holuropholis Duméril, 1856
- Genus Homalocephalus Jan, 1862 accepted as Pseudoxyrhopus Günther, 1881
- Genus Homalocranion Duméril, 1853
- Genus Homalocranium Günther, 1863
- Genus Homalophis Peters, 1871
- Genus Homalopsis Kuhl & Hasselt, 1822
- Genus Homalosoma Wagler, 1830
- Genus Homolopsis Bonaparte, 1831 accepted as Homalopsis Kuhl & Hasselt, 1822
- Genus Hormonotus Hallowell, 1857
- Genus Hoserkukriae Hoser, 2012 accepted as Oligodon Boie in Férussac, 1826
- Genus Hugheskukri Hoser, 2012 accepted as Oligodon Boie in Férussac, 1826
- Genus Huria Latreille, 1804
- Genus Hurianus Rafinesque, 1815
- Genus Hurria Daudin, 1803
- Genus Hurriah Rafinesque, 1815
- Genus Hurrias Oken, 1817
- Genus Hurrix Ritgen, 1828
- Genus Hydrablabes Boulenger, 1891
- Genus Hydraethiops Günther, 1872
- Genus Hydrocalamus Cope, 1885
- Genus Hydrodipsas Peters, 1859
- Genus Hydrodynastes Fitzinger, 1843
- Genus Hydromorphus Peters, 1859
- Genus Hydrophobus Günther, 1862
- Genus Hydrops Wagler, 1830
- Genus Hydropsis Fitzinger, 1843 accepted as Fordonia Gray, 1842
- Genus Hylophis Fitzinger, 1843
- Genus Hypistes accepted as Hipistes Gray, 1849
- Genus Hypistis Werner, 1929
- Genus Hypserina Gray, 1835
- Genus Hypsiglena Cope, 1860
- Genus Hypsirhina Wagler, 1830
- Genus Hypsirhynchus Günther, 1858
- Genus Hypsirina Gray, 1833-34
- Genus Ialtris Cope, 1862
- Genus Idiophis Mocquard, 1901
- Genus Idiopholis Mocquard, 1892
- Genus Ignanognathus accepted as Iguanognathus Boulenger, 1898
- Genus Iguanognathus Boulenger, 1898
- Genus Imantodes Duméril, 1853
- Genus Incaspis Donoso-Barros, 1974
- Genus Ischnognathus Duméril & Bibron, 1854
- Genus Isoscelis Günther, 1858
- Genus Ithycyphus Günther, 1873
- Genus Jackyhosernatrix Hoser, 2012 accepted as Natrix Laurenti, 1768
- Genus Jacobclarkus Hoser, 2012 accepted as Lycophidion Fitzinger, 1843
- Genus Jockpaullus Hoser, 2012 accepted as Rhadinaea Cope, 1863
- Genus Karnsophis Murphy & Voris, 2013
- Genus Katophis Macleay, 1877
- Genus Katrinahoserea Hoser, 2012 accepted as Gonyosoma Wagler, 1828
- Genus Keiometopon Taylor, 1962
- Genus Kirnerea Hoser, 2012 accepted as Tropidonophis Jan, 1863
- Genus Kotabilycodon Hoser, 2014 accepted as Lycodon Fitzinger, 1826
- Genus Kualatahan Murphy & Voris, 2014
- Genus Laidlawserpens Hoser, 2012 accepted as Coniophanes Cope, 1860
- Genus Lampropeltis Fitzinger, 1843
- Genus Lamprophis Fitzinger, 1843
- Genus Lamprosoma Hallowell, 1856 accepted as Chionactis Cope, 1860
- Genus Langaha Bruguière, 1784
- Genus Langaya Shaw, 1802 accepted as Langaha Bruguière, 1784
- Genus Leimadophis Fitzinger, 1843
- Genus Leioheterodon Duméril & Bibron, 1844
- Genus Leionotus Jan, 1863
- Genus Lejonotus Jan, 1863
- Genus Lepidocephalus Hallowell, 1860
- Genus Lepidognathus Lidth de Jeude in Weber, 1891
- Genus Lepteodeira accepted as Leptodeira Fitzinger, 1843
- Genus Leptgnathus accepted as Leptognathus Duméril & Bibron, 1854
- Genus Leptocalamus Günther, 1872
- Genus Leptodeira Fitzinger, 1843
- Genus Leptodira Agassiz, 1846 accepted as Leptodeira Fitzinger, 1843
- Genus Leptodrymus Amaral, 1927
- Genus Leptognathus Duméril & Bibron, 1854
- Genus Leptophidium Hallowell, 1860
- Genus Leptophina Bonaparte, 1831 accepted as Leptophis Bell, 1825
- Genus Leptophis Bell, 1825
- Genus Lepturophis Boulenger, 1900
- Genus Lielaphis Günther, 1863
- Genus Ligonirostra Cope, 1863 accepted as Prosymna Gray, 1849
- Genus Limadophis Agassiz, 1846
- Genus Limnophis Günther, 1865
- Genus Liobeterodon accepted as Leioheterodon Duméril & Bibron, 1844
- Genus Liochlorophis Oldham & Smith, 1991
- Genus Liodytes Cope, 1885
- Genus Lioheterodon Boulenger, 1893
- Genus Lioheterophis Amaral, 1934
- Genus Lioninia Hallowell, 1860
- Genus Liopeltis Fitzinger, 1843
- Genus Liophidium Boulenger, 1896
- Genus Liophis Wagler, 1830
- Genus Liopholidophis Mocquard, 1904
- Genus Liopletis accepted as Liopeltis Fitzinger, 1843
- Genus Liparophis Peracca, 1904
- Genus Lukefabaserpens Hoser, 2012 accepted as Leptodeira Fitzinger, 1843
- Genus Lycodon Fitzinger, 1826
- Genus Lycodonomorphus Fitzinger, 1843
- Genus Lycodontomorphus Agassiz, 1846 accepted as Lycodonomorphus Fitzinger, 1843
- Genus Lycodryas Günther, 1879
- Genus Lycognathophis Boulenger, 1893
- Genus Lycognathus Duméril, 1853
- Genus Lycognatophis accepted as Lycognathophis Boulenger, 1893
- Genus Lycophidion Fitzinger, 1843
- Genus Lycophidium Agassiz, 1846 accepted as Lycophidion Fitzinger, 1843
- Genus Lycophydion Agassiz, 1844 accepted as Lycophidion Fitzinger, 1843
- Genus Lycotorhynchus accepted as Lytorhynchus Peters, 1862
- Genus Lydodon accepted as Lycodon Fitzinger, 1826
- Genus Lygophis Fitzinger, 1843
- Genus Lystrophis Cope, 1885
- Genus Lytorhynchus Peters, 1862
- Genus Macmillanus Hoser, 2012 accepted as Dendrelaphis Boulenger, 1890
- Genus Maconchieus Hoser, 2012 accepted as Imantodes Duméril, 1853
- Genus Macrocalamus Günther, 1864
- Genus Macrophis Barboza de Bocage, 1866
- Genus Macropisthodon Boulenger, 1893
- Genus Macropophis Boulenger, 1893
- Genus Macroprotodon Guichenot, 1850
- Genus Macrops Wagler, 1830
- Genus Macrosoma Leach in Bowdich, 1819 accepted as Psammophis Fitzinger, 1826
- Genus Madagascarophis Mertens, 1952
- Genus Magliophis Zaher, Grazziotin, Cadle, Murphy, de Moura-Leite & Bonatto, 2009
- Genus Malpolon Fitzinger, 1826
- Genus Manolepis Cope, 1885
- Genus Mariolisus Hoser, 2012 accepted as Regina Baird & Girard, 1853
- Genus Martinekea Hoser, 2012 accepted as Orthriophis Utiger, Helfenberger, Schätti, Schmidt, Ruf & Ziswiler, 2002
- Genus Masticophis Baird & Girard, 1853
- Genus Mastigodryas Amaral, 1934
- Genus Mattborgus Hoser, 2013 accepted as Liophidium Boulenger, 1896
- Genus Megalops Hallowell, 1860
- Genus Mehelia accepted as Mehelya Csiki, 1903
- Genus Meizodon Fischer, 1856
- Genus Mesopeltis Cope, 1867
- Genus Mesotes Jan, 1862
- Genus Metoporhina Günther, 1858
- Genus Michaelnicholsus Hoser, 2012 accepted as Leioheterodon Duméril & Bibron, 1844
- Genus Microdromus Günther, 1872
- Genus Micronatrix Parmley & Hunter, 2010 †
- Genus Microphis Hallowell, 1854
- Genus Micropisthodon Mocquard, 1894
- Genus Microps Hallowell, 1856 accepted as Tropidoclonion Cope, 1860
- Genus Migiurtinophis Scortecci, 1935
- Genus Mike Werner, 1924
- Genus Mimometopon Werner, 1903
- Genus Mimophis Günther, 1868
- Genus Mindanaosnakebustersus Hoser, 2014 accepted as Lycodon Fitzinger, 1826
- Genus Mintonius Collins & Taggart, 2008
- Genus Mintonophis Murphy & Voris, 2014
- Genus Miocoluber Parmley, 1988 †
- Genus Mionatrix Sun, 1961 †
- Genus Miralia Gray, 1842
- Genus Mizodon Peters, 1861 accepted as Meizodon Fischer, 1856
- Genus Montaspis Bourquin, 1991
- Genus Moseselfakharikukri Hoser, 2012 accepted as Oligodon Boie in Férussac, 1826
- Genus Mulvanyus Hoser, 2012 accepted as Boiga Fitzinger, 1826
- Genus Mulvanyus Hoser, 2017 accepted as Boiga Fitzinger, 1826
- Genus Mussurana Zaher, Grazziotin, Cadle, Murphy, de Moura-Leite & Bonatto, 2009
- Genus Myanmarelfakhari Hoser, 2014 accepted as Oligodon Boie in Férussac, 1826
- Genus Myanophis Köhler, Khaing & Than in Köhler et al., 2021
- Genus Myron Gray, 1849
- Genus Myrrophis Kumar, Sanders, George & Murphy, 2012
- Genus Nanus Bachmayer & Szyndlar, 1985 †
- Genus Natriciteres Loveridge, 1953
- Genus Natrix Laurenti, 1768
- Genus Nebraskophis Holman, 1973 †
- Genus Neilsimpsonus Hoser, 2012 accepted as Imantodes Duméril, 1853
- Genus Neilsonnemanus Hoser, 2012 accepted as Thamnophis Fitzinger, 1843
- Genus Neomacer Cope, 1900 accepted as Uromacer Duméril & Bibron, 1853
- Genus Neonatrix Holman, 1973 †
- Genus Neopareas Günther, 1895
- Genus Neospades De Vis, 1889
- Genus Nerodia Baird & Girard, 1853
- Genus Nerophidion Werner, 1924
- Genus Neusterophis Günther, 1863
- Genus Ninia Baird & Girard, 1853
- Genus Ninkukri Hoser, 2012 accepted as Oligodon Boie in Férussac, 1826
- Genus Noterophis Gistl, 1848 accepted as Enhydris Latreille, 1801
- Genus Nothopsis Cope, 1871
- Genus Nuchisulcophis Mahendra, 1984
- Genus Oacatochus accepted as Oocatochus Helfenberger, 2001
- Genus Odontomus Duméril, 1853
- Genus Ogmius Cope, 1869 †
- Genus Oligodon Boie in Férussac, 1826
- Genus Oligolepis Boulenger, 1895
- Genus Olisthenes Cope, 1859
- Genus Olygodon accepted as Oligodon Boie in Férussac, 1826
- Genus Omoadiphas Köhler, Wilson & McCranie, 2001
- Genus Oocatochus Helfenberger, 2001
- Genus Oophilositum Parker, 1933
- Genus Opetiodon Duméril, 1853
- Genus Opheodryas Werner, 1929 accepted as Opheodrys Fitzinger, 1843
- Genus Opheodrys Fitzinger, 1843
- Genus Opheomorphus Fitzinger, 1843
- Genus Ophibolus Baird & Girard, 1853
- Genus Ophielaps Sauvage, 1877
- Genus Ophiodrys accepted as Opheodrys Fitzinger, 1843
- Genus Ophiomorphus Cope, 1862
- Genus Ophis Wagler in Spix, 1824 accepted as Waglerophis de Lemos Romano & Hoge, 1972
- Genus Ophites Wagler, 1830
- Genus Ophitis accepted as Ophites Wagler, 1830
- Genus Opisthiodon Peters, 1861
- Genus Opisthoplus Peters, 1882
- Genus Opisthotrophis accepted as Opisthotropis Günther, 1872
- Genus Opisthotropis Günther, 1872
- Genus Oreocalamus Boulenger, 1899
- Genus Oreocryptophis Utiger, Schatti & Helfenberger, 2005
- Genus Oreophis Dugès, 1897
- Genus Oreophis Utiger, Helfenberger & Schätti in Utiger, Helfenberger, Schaetti, Schmidt, Ruf & Ziswiler, 2002 accepted as Oreocryptophis Utiger, Schatti & Helfenberger, 2005
- Genus Orientocoluber Kharin, 2011
- Genus Orthriophis Utiger, Helfenberger, Schätti, Schmidt, Ruf & Ziswiler, 2002
- Genus Oxybelis Wagler, 1830
- Genus Oxycalamus Günther, 1864
- Genus Oxykukrius Hoser, 2012 accepted as Oligodon Boie in Férussac, 1826
- Genus Oxynatrix Hoser, 2012 accepted as Tropidonophis Jan, 1863
- Genus Oxyorrhos Fischer, 1879
- Genus Oxyreedus Hoser, 2012 accepted as Calamaria Boie, 1826
- Genus Oxyrhina Jan, 1862
- Genus Oxyrhopus Wagler, 1830
- Genus Oxyropus accepted as Oxyrhopus Wagler, 1830
- Genus Oxyrrhopus Agassiz, 1846 accepted as Oxyrhopus Wagler, 1830
- Genus Pachyophis Werner, 1924
- Genus Padangia Werner, 1924 accepted as Etheridgeum Wallach, 1988
- Genus Pagonaspis Amaral, 1929
- Genus Palaeomalpolon Szyndlar, 1981 †
- Genus Palaeonatrix Mlynarski, Szyndlar, Estes & Sanchiz, 1982 †
- Genus Paleofarancia Auffenberg, 1963 †
- Genus Paleoheterodon Holman, 1964 †
- Genus Palusophis Montingelli, Grazziotin, Battilana, Murphy, Zhang & Zaher, 2019
- Genus Pantherophis Fitzinger, 1843
- Genus Pappophis Macleay, 1877
- Genus Paracoluber Holman, 1970 †
- Genus Parahelicops Bourret, 1934
- Genus Paralycodon Hoser, 2014 accepted as Lycodon Fitzinger, 1826
- Genus Paranatrix Mahendra, 1984
- Genus Paraoxybelis Auffenberg, 1963 †
- Genus Paraphimophis Zaher, Grazziotin, Murphy, Scrocchi, Benavides, Zhang & Bonatto in Grazziotin et al., 2012
- Genus Parapostolepis Amaral, 1929
- Genus Paraptychophis de Lema, 1967
- Genus Pararhabdophis Bourret, 1934
- Genus Pararhadinaea Böttger, 1898
- Genus Paratapinophis Angel, 1929
- Genus Paratychophis accepted as Paraptychophis de Lema, 1967
- Genus Paraxenophis Georgalis & Delfino, 2019 †
- Genus Pares accepted as Pareas Wagler, 1830
- Genus Paroxyrhopus Schenkel, 1901
- Genus Passerita Gray, 1825 accepted as Ahaetulla Link, 1807
- Genus Passerita Swainson, 1839
- Genus Passirita Swainson, 1839
- Genus Paulelliottus Hoser, 2013 accepted as Gongylosoma Fitzinger, 1843
- Genus Pediophis Fitzinger, 1843 accepted as Eirenis Jan, 1862
- Genus Pelophis Witte, 1922 accepted as Helophis de Witte & Laurent, 1942
- Genus Periergophis Georgalis & Delfino, 2019 †
- Genus Perinetia Domergue, 1988 accepted as Brygophis Domergue & Bour, 1989
- Genus Periops Wagler, 1830
- Genus Persiophis Rajabizadeh, Pyron, Nazarov, Poyarkov, Adriaens & Herrel, 2020
- Genus Petalognathus Duméril & Bibron, 1854
- Genus Phalotris Cope, 1862
- Genus Philodendros Fitzinger, 1843
- Genus Philodendrus Agassiz, 1846
- Genus Philodryas Wagler, 1830
- Genus Philothalmus accepted as Philothamnus Smith, 1847
- Genus Philothamnus Smith, 1847
- Genus Phimophis Cope, 1860
- Genus Phimothyra Cope, 1861 accepted as Salvadora Baird & Girard, 1853
- Genus Phimothyra Cope, 1860 accepted as Salvadora Baird & Girard, 1853
- Genus Phragmitophis Günther, 1862
- Genus Phrydops Boulenger, 1905
- Genus Phrynonax Cope, 1862
- Genus Phydrops accepted as Phrydops Boulenger, 1905
- Genus Phyllophis Günther, 1864
- Genus Phyllorhynchus Stejneger, 1890
- Genus Phyllosira Cope, 1862
- Genus Phylodryas Fitzinger, 1843 accepted as Philodryas Wagler, 1830
- Genus Phytolopsis Gray, 1849
- Genus Pimophis accepted as Phimophis Cope, 1860
- Genus Pituophis Holbrook, 1842
- Genus Pityophis Hallowell, 1853 accepted as Pituophis Holbrook, 1842
- Genus Plagiodon Duméril, 1853
- Genus Plagiopholis Boulenger, 1893
- Genus Plastor Gistl, 1848 accepted as Oxybelis Wagler, 1830
- Genus Platyceps Blyth, 1860
- Genus Platyinion Amaral, 1923
- Genus Platypterix Duméril & Bibron, 1854
- Genus Platypteryx Duméril, 1853
- Genus Pleiocercus Salvin, 1861 accepted as Pliocercus Cope, 1860
- Genus Pleiokerkos Cope, 1862 accepted as Pliocercus Cope, 1860
- Genus Plesiodipsas Harvey, Rivas Fuenmayor, Caicedo Portilla & Rueda-Almonacid, 2008
- Genus Pliocercus Cope, 1860
- Genus Plumridgeus Hoser, 2012 accepted as Aparallactus Smith, 1849
- Genus Poecilopholis Boulenger, 1903
- Genus Pogonaspis Cope, 1894
- Genus Polydontophis accepted as Polyodontophis Boulenger, 1890
- Genus Polyodontophis Boulenger, 1890
- Genus Polyondontophis accepted as Polyodontophis Boulenger, 1890
- Genus Prammophis Beddome, 1862 accepted as Psammophis Fitzinger, 1826
- Genus Proahaetulla Mallik, Achyuthan, Ganesh, Pal, Vijayakumar & Shanker, 2019
- Genus Proboscidophis Fan, 1931
- Genus Procinura Cope, 1879
- Genus Procteria Werner, 1924
- Genus Prosymna Gray, 1849
- Genus Proterodon Hallowell, 1860
- Genus Psammodynastes Günther, 1858
- Genus Psammophis Fitzinger, 1826
- Genus Psammophylax Fitzinger, 1843
- Genus Psamnodynastes accepted as Psammodynastes Günther, 1858
- Genus Pseudablabes Boulenger, 1896
- Genus Pseudagkistrodon Van Denburgh, 1909
- Genus Pseudalsophis Zaher, Grazziotin, Cadle, Murphy, de Moura-Leite & Bonatto, 2009
- Genus Pseudaspis Fitzinger, 1843
- Genus Pseuderyx Fitzinger, 1843 accepted as Pseudoeryx Fitzinger, 1826
- Genus Pseudoboa Schneider, 1801
- Genus Pseudoboodon Peracca, 1897
- Genus Pseudocemophora Auffenberg, 1963 †
- Genus Pseudoclelia Rendahl & Vestergren, 1941
- Genus Pseudocyclophis Böttger, 1888
- Genus Pseudoerix Thon in Ersch & Gruber, 1838 accepted as Pseudoeryx Fitzinger, 1826
- Genus Pseudoeryx Fitzinger, 1826
- Genus Pseudofeania accepted as Enhydris Latreille, 1801
- Genus Pseudoferania Ogilby, 1890 accepted as Enhydris Latreille, 1801
- Genus Pseudoficimia Bocourt, 1883
- Genus Pseudoithycyphus Domergue, 1988
- Genus Pseudoleptodeira Taylor, 1938
- Genus Pseudopareas Boulenger, 1896
- Genus Pseudophis Fitzinger, 1843
- Genus Pseudorabdion Jan, 1862
- Genus Pseudorhabdion Boulenger, 1885 accepted as Pseudorabdion Jan, 1862
- Genus Pseudorhabdium Boulenger, 1894 accepted as Pseudorabdion Jan, 1862
- Genus Pseudotarbophis Domergue, 1955
- Genus Pseudotomodon Koslowsky, 1896
- Genus Pseudoxenodon Boulenger, 1890
- Genus Pseudoxyrhopus Günther, 1881
- Genus Pseustes Fitzinger, 1843
- Genus Psomophis Myers & Cadle, 1994
- Genus Psuestes accepted as Pseustes Fitzinger, 1843
- Genus Ptyas Fitzinger, 1843
- Genus Ptychophis Gomes, 1915
- Genus Pughus Hoser, 2012 accepted as Thamnophis Fitzinger, 1843
- Genus Pythonodipsas Günther, 1868
- Genus Pythonopsis Peters, 1871
- Genus Rabdion Duméril, 1853
- Genus Rabdosoma Duméril, 1853
- Genus Rachidelus Boulenger, 1908
- Genus Rachiodon Jourdan, 1833
- Genus Raclitia Gray, 1842
- Genus Raphiodon Jourdan, 1834 accepted as Dasypeltis Wagler, 1830
- Genus Rayhammondus Hoser, 2012 accepted as Taphrometopon Brandt, 1838
- Genus Regida accepted as Regina Baird & Girard, 1853
- Genus Regina Baird & Girard, 1853
- Genus Rentonus Hoser, 2012 accepted as Crotalus Linnaeus, 1758
- Genus Rhabdion Duméril, 1853 accepted as Rabdion Duméril, 1853
- Genus Rhabdophidium Boulenger, 1894 accepted as Rabdion Duméril, 1853
- Genus Rhabdophis Fitzinger, 1843
- Genus Rhabdops Boulenger, 1893
- Genus Rhabdosoma Günther, 1858
- Genus Rhabdotophis Werner, 1909
- Genus Rhachidelus Boulenger, 1908
- Genus Rhadinaea Cope, 1863
- Genus Rhadinea Cope, 1863
- Genus Rhadinella Smith, 1941
- Genus Rhadinophanes Myers & Campbell, 1981
- Genus Rhadinophis Vogt, 1922
- Genus Rhagerhis Peters, 1862
- Genus Rhagerrhis Günther, 1866
- Genus Rhamnophis Günther, 1862
- Genus Rhamphiculus Bonaparte, 1854 accepted as Ptilinopus Swainson, 1825
- Genus Rhamphiophis Peters, 1854
- Genus Rhamphophis Boulenger, 1892
- Genus Rhegnops Cope, 1866
- Genus Rhinaspis Fitzinger, 1843
- Genus Rhinchophis accepted as Rhynchophis Mocquard, 1897
- Genus Rhinechis Michahelles in Wagler, 1832
- Genus Rhinobothrium Fitzinger, 1843 accepted as Rhinobothryum Wagler, 1830
- Genus Rhinobothryum Wagler, 1830
- Genus Rhinocheilus Baird & Girard, 1853
- Genus Rhinochilus Yarrow, 1882 accepted as Rhinocheilus Baird & Girard, 1853
- Genus Rhinodryas Werner, 1903
- Genus Rhinosimus Duméril, 1853 accepted as Phimophis Cope, 1860
- Genus Rhinostoma Fitzinger, 1826
- Genus Rhynchocalamus Günther, 1865
- Genus Rhynchonyx Peters, 1869
- Genus Rhynchophis Mocquard, 1897
- Genus Richardwellsus Hoser, 2012 accepted as Zamenis Wagler, 1830
- Genus Robvalenticus Hoser, 2012 accepted as Rhadinaea Cope, 1863
- Genus Rodriguesophis Zaher, Grazziotin, Murphy, Scrocchi, Benavides, Zhang & Bonatto in Grazziotin et al., 2012
- Genus Rossnolanus Hoser, 2013 accepted as Liopeltis Fitzinger, 1843
- Genus Sahyadriophis Patel, Thackeray, Campbell & Mirza, 2023
- Genus Salvadora Baird & Girard, 1853
- Genus Sammykukriae Hoser, 2012 accepted as Oligodon Boie in Férussac, 1826
- Genus Saphenophis Myers, 1973
- Genus Sardophis Georgalis & Delfino, 2019 †
- Genus Scaphiodontophis Taylor & Smith, 1943
- Genus Scaphiophis Peters, 1870
- Genus Schmidtophis Taylor, 1949
- Genus Schwartzophis Zaher, Grazziotin, Cadle, Murphy, de Moura-Leite & Bonatto, 2009
- Genus Scolecophis Fitzinger, 1843
- Genus Scopelophis Fitzinger, 1843
- Genus Scotophis Baird & Girard, 1853
- Genus Seminatrix Cope, 1895
- Genus Senticolis Dowling & Fries, 1987
- Genus Shaneblackus Hoser, 2013 accepted as Dendrelaphis Boulenger, 1890
- Genus Shanekingus Hoser, 2013 accepted as Atractus Wagler, 1828
- Genus Sharonhoserea Hoser, 2012 accepted as Coronella Laurenti, 1768
- Genus Sibinophis accepted as Sibynophis Fitzinger, 1843
- Genus Sibon Fitzinger, 1826
- Genus Sibynomorphus Fitzinger, 1843
- Genus Sibynophis Fitzinger, 1843
- Genus Siebenrockia Poche, 1904 accepted as Mehelya Csiki, 1903
- Genus Simocephalus Günther, 1858
- Genus Simophis Peters, 1860
- Genus Sinoelaphe Hoser, 2012 accepted as Euprepiophis Fitzinger, 1843
- Genus Sinoelfakhari Hoser, 2014 accepted as Oligodon Boie in Férussac, 1826
- Genus Sinonatrix Rossman & Eberle, 1977
- Genus Siphlophis Fitzinger, 1843
- Genus Sivaophis Head, 2005 †
- Genus Slatteryus Hoser, 2012 accepted as Psammophis Fitzinger, 1826
- Genus Slopboiga Hoser, 2013 accepted as Boiga Fitzinger, 1826
- Genus Smithophis Giri, Gower, Das, Lalremsanga, Lalronunga, Captain & Deepak, 2019
- Genus Smythkukri Hoser, 2012 accepted as Oligodon Boie in Férussac, 1826
- Genus Smythserpens Hoser, 2012 accepted as Coniophanes Cope, 1860
- Genus Snakebustersus Hoser, 2014 accepted as Lycodon Fitzinger, 1826
- Genus Snowdonus Hoser, 2014 accepted as Aparallactus Smith, 1849
- Genus Sonora Baird & Girard, 1853
- Genus Sordellina Procter, 1923
- Genus Spaelosophis accepted as Spalerosophis Jan in Filippi, 1865
- Genus Spalerosophis Jan in Filippi, 1865
- Genus Spaniopholis Mocquard, 1897
- Genus Sphalerosophis Kramer & Schurrenberger, 1963
- Genus Sphecodes Duméril, 1853
- Genus Sphenocalamus Fischer, 1883
- Genus Spilotes Wagler, 1830
- Genus Spulotes accepted as Spilotes Wagler, 1830
- Genus Stegonotus Duméril & Bibron, 1854
- Genus Stenophis Boulenger, 1896
- Genus Stenorhabdium Werner, 1909
- Genus Stenorhina Duméril & Bibron, 1854 accepted as Stenorrhina Duméril, 1853
- Genus Stenorrhina Duméril, 1853
- Genus Stichophanes Wang, Messenger, Zhao & Zhu, 2014
- Genus Stilosoma Brown, 1890
- Genus Storeria Baird & Girard, 1853
- Genus Stremmatognathus Duméril & Bibron, 1854
- Genus Streptophorus Duméril & Bibron, 1854
- Genus Stylophis Berg, 1901
- Genus Stylosoma Berg, 1901 accepted as Stilosoma Brown, 1890
- Genus Styporhynchus Peters, 1863
- Genus Styporhyncus accepted as Styporhynchus Peters, 1863
- Genus Subsessor Murphy & Voris, 2014
- Genus Sumatranus Murphy & Voris, 2014
- Genus Sundanatrix Hoser, 2012 accepted as Amphiesma Duméril & Bibron, 1854
- Genus Swileserpens Hoser, 2012 accepted as Buhoma Ziegler, Vences, Glaw & Bohme, 1997
- Genus Sympeltophis Werner, 1925
- Genus Symphimus Cope, 1869
- Genus Symphinus Werner, 1929 accepted as Symphimus Cope, 1869
- Genus Sympholis Cope, 1862
- Genus Synchalinus Cope, ? 1894
- Genus Synophis Peracca, 1896
- Genus Tachymenis Wiegmann, 1835
- Genus Tachynectes Fitzinger, 1843
- Genus Tachyplotus Reinhardt, 1866
- Genus Taeniophallus Cope, 1895
- Genus Taeniophis Girard, 1854
- Genus Tamnodynastes Pinto & Maciel, 1929 accepted as Thamnodynastes Wagler, 1830
- Genus Tantalophis Duellman, 1958
- Genus Tantilla Baird & Girard, 1853
- Genus Tantillita Smith, 1941
- Genus Taphrometopon Brandt, 1838
- Genus Tapinophis Boulenger, 1899
- Genus Tarbophis Fleischmann, 1831
- Genus Tauntonophis Parmley & Walker, 2003 †
- Genus Teleolepis Cope, 1869
- Genus Telescopus Wagler, 1830
- Genus Temnorhynchus Smith, 1849 accepted as Prosymna Gray, 1849
- Genus Tetragonosoma Günther, 1858
- Genus Tetralepis Böttger, 1892
- Genus Texasophis Holman, 1977 †
- Genus Thalaerophis accepted as Leptophis Bell, 1825
- Genus Thalerophis Oliver, 1948 accepted as Leptophis Bell, 1825
- Genus Thalesius Yuki, 1993
- Genus Thamnodynastes Wagler, 1830
- Genus Thamnophis Fitzinger, 1843
- Genus Thelotornis Smith, 1849
- Genus Thermophis Malnate, 1953
- Genus Thrasops Hallowell, 1857
- Genus Thyphlogeophis Carus, 1879
- Genus Toluca Kennicott in Baird, 1859 accepted as Conopsis Günther, 1858
- Genus Tomodon Duméril, 1853
- Genus Toxicodryas Hallowell, 1857
- Genus Toxycodryas accepted as Toxicodryas Hallowell, 1857
- Genus Trachischium Günther, 1858
- Genus Trachyischium Berg, 1901 accepted as Trachischium Günther, 1858
- Genus Trachyophis Werner, 1925
- Genus Tragophis Fitzinger, 1861
- Genus Tragops Wagler, 1830
- Genus Trasops accepted as Thrasops Hallowell, 1857
- Genus Tretanorhinus Duméril & Bibron, 1854
- Genus Tretralepis accepted as Tetralepis Böttger, 1892
- Genus Triglyphodon Duméril, 1853
- Genus Trigonocephalus Oppel, 1811
- Genus Trigonurus Duméril, 1853
- Genus Trimerodytes Cope, 1895
- Genus Trimerorhinus Smith, 1847
- Genus Trimetopon Cope, 1885
- Genus Trimorphodon Cope, 1861
- Genus Trimorphon Boulenger, 1896 accepted as Trimorphodon Cope, 1861
- Genus Tripanurgos Fitzinger, 1843
- Genus Tripanurgus Agassiz, 1846
- Genus Trirhinopholis Boulenger, 1893
- Genus Tropidoclonion Cope, 1860
- Genus Tropidoclonium Cope, 1864 accepted as Tropidoclonion Cope, 1860
- Genus Tropidodipsas Günther, 1858
- Genus Tropidodryas Fitzinger, 1843
- Genus Tropidonophis Jan, 1863
- Genus Tropidophis Gray, 1849 accepted as Atretium Cope, 1861
- Genus Typhlocalamus Günther, 1872
- Genus Typhlogeophis Günther, 1879
- Genus Tyria Fitzinger, 1826
- Genus Ulupe Blanford, 1878
- Genus Umbrivaga Roze, 1964
- Genus Uromacer Duméril & Bibron, 1853
- Genus Uromacerina Amaral, 1929
- Genus Urotheca Cocteau & Bibron in Sagra, 1843
- Genus Vetusacrochordus Hoser, 2014 † accepted as Acrochordus Hornstedt, 1787
- Genus Virginia Baird & Girard, 1853
- Genus Waglerophis de Lemos Romano & Hoge, 1972
- Genus Wallisserpens Hoser, 2012 accepted as Rhadinaea Cope, 1863
- Genus Wallophis Werner, 1929
- Genus Wellingtonnatrix Hoser, 2012 accepted as Amphiesma Duméril & Bibron, 1854
- Genus Wellsnatrix Hoser, 2012 accepted as Amphiesma Duméril & Bibron, 1854
- Genus Wellsserpens Hoser, 2013 accepted as Chrysopelea Boie in Férussac, 1826
- Genus Wernerodakaria Strand, 1928 †
- Genus Whittonserpens Hoser, 2012 accepted as Conophis Peters, 1860
- Genus Whybrowus Hoser, 2012 accepted as Thamnophis Fitzinger, 1843
- Genus Xenelaphis Günther, 1864
- Genus Xenochrophis Günther, 1864
- Genus Xenoderma accepted as Xenodermus Reinhardt, 1837
- Genus Xenodon Boie in Férussac, 1826
- Genus Xenopholis Peters, 1869
- Genus Xenoxybelis
- Genus Xenurophis Günther, 1863
- Genus Xyelodontophis Broadley & Wallach, 2002
- Genus Yeomansus Hoser, 2012 accepted as Hierophis Bonaparte, 1834
- Genus Zacholus Wagler, 1830
- Genus Zamenis Wagler, 1830
- Genus Zamenophis Günther, 1872
- Genus Zaoccys Sclater, 1891
- Genus Zaocys Cope, 1860
- Genus Zapyrus Günther, 1864
- Genus Zelceophis Szyndlar, 1984 †
- 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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