Classification of Gauthier et al. 1989

Subcl. Diapsida Osborn 1903 [diapsid]
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Or. †Araeoscelidia Williston 1913
Superor. Therapsida Broom 1905 [therapsid]
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Infraor. †Biarmosuchia Sigogneau-Russell 1989
Infraor. Cynodontia Owen 1861
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G. †Diademodon Seeley 1895
G. †Exaeretodon Cabrera 1943
Mammalia Linnaeus 1758 [mammal]
Fm. †Morganucodontidae Kuehne 1958
G. †Procynosuchus Broom 1937
G. †Thrinaxodon Seeley 1894
Fm. †Tritylodontidae Cope 1884
Subor. †Dicynodontia Owen 1859 [dicynodont]
Subor. †Dinocephalia Seeley 1894
Subor. †Gorgonopsia Seeley 1894
Subph. Tetrapoda Goodrich 1930 [tetrapod]
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Cl. Amphibia Linnaeus 1758
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Fm. †Loxommatidae Watson 1917
Subor. †Temnospondyli von Zittel 1887
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G. †Branchiosaurus Fritsch 1876
Fm. †Colosteidae Cope 1875
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G. †Greererpeton Romer 1969
G. †Dendrerpeton Owen 1853
G. †Edops Romer 1936
G. †Eryops Cope 1877
Lissamphibia Haeckel 1866
G. †Tersomius Case 1910
Anthracosauria Säve-Söderbergh 1934
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Superfm. †Anthracosauroidea Cope 1872
Subor. †Diadectomorpha Watson 1917
Or. †Microsauria Dawson 1863
Or. Crocodilomorphi Hay 1930 [crocodilian]
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Subor. Crocodyliformes Hay 1930
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G. †Araripesuchus Price 1959
G. †Bernissartia Dollo 1883
Crocodylia Owen 1842 [crocodilian]
Fm. †Goniopholidae Cope 1875
G. †Notosuchus Woodward 1896
Fm. †Protosuchidae Brown 1934
G. †Pseudhesperosuchus Bonaparte 1969
G. †Sphenosuchus Haughton 1915
Subor. Cotylosauria Cope 1880
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Amniota Haeckel 1866 [amniote]
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Subor. †Mesosauria Seeley 1892
Fm. †Millerettidae Romer 1956
Subor. †Pareiasauria Seeley 1888
Procolophonia Seeley 1888
Cl. Reptilia Laurenti 1768 [reptile]
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Subcl. Anapsida Williston 1917 [anapsid]
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Fm. †Captorhinidae Case 1911
Or. Testudines Batsch 1788 [turtle]
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Chelonia Latreille 1800 [turtle]
G. †Kayentachelys Gaffney et al. 1987
G. †Proganochelys Baur 1887
Romeriida Gauthier et al. 1988
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Diapsida Osborn 1903 [diapsid]
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Sauria Gauthier 1984 [crown diapsid]
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Archosauromorpha Huene 1946 [archosauromorph]
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Archosauriformes Gauthier 1986
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Archosauria Cope 1869 [archosaur]
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Ornithosuchia Huene 1908
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Dinosauria Owen 1842 [dinosaur]
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Ornithischia Seeley 1888 [ornithischian]
Saurischia Seeley 1888 [saurischian]
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Sauropodomorpha Huene 1932
Theropoda Marsh 1881 [theropod]
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Carnosauria Huene 1920 [carnosaur]
Ceratosauria Marsh 1884 [ceratosaur]
Coelurosauria Huene 1914 [coelurosaur]
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G. †Archaeopteryx Meyer 1861
Infracl. Aves Linnaeus 1758 [bird]
Fm. †Caenagnathidae Sternberg 1940
G. †Deinonychus Ostrom 1969
Or. †Hesperornithiformes Fürbringer 1888
Fm. †Ornithomimidae Marsh 1890 [ornithomimid]
G. †Compsognathus Wagner 1861 [elegant jaw]
G. †Euparkeria Broom 1913
G. †Herrerasaurus Reig 1963
G. †Lagosuchus Romer 1971 [rabbit crocodile]
Fm. †Ornithosuchidae Huene 1908
Or. †Pterosauria Kaup 1834 [pterosaur]
Pseudosuchia Zittel 1890
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Crocodylomorpha Hay 1930 [crocodilian]
Fm. †Phytosauridae Jaeger 1828
G. †Postosuchus Chatterjee 1985
G. †Terrestrisuchus Crush 1984
G. †Ticinosuchus Krebs 1965
G. †Erythrosuchus Broom 1905
Fm. †Proterosuchidae Broom 1906
Or. †Choristodera Cope 1876 [choristodere]
Or. †Protorosauria Huxley 1871
Or. †Rhynchosauria Osborn 1903 [rhynchosaur]
G. †Trilophosaurus Case 1928
Lepidosauromorpha Benton 1983
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Fm. †Kuehneosauridae Romer 1966
Lepidosauria Haeckel 1866 [lepidosaur]
G. †Palaeagama Broom 1926
G. †Paliguana Broom 1903
G. †Saurosternon Huxley 1868
Or. †Younginiformes Romer 1933
G. †Paleothyris Carroll 1969
Synapsida Osborn 1903 [synapsid]
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G. †Casea Williston 1910
G. †Haptodus Gaudry 1886
G. †Ophiacodon Marsh 1878
Subfm. Sphenodontinae Cope 1871
Subcl. Lissamphibia Haeckel 1866
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Subor. Anura Fischer von Waldheim 1813 [frog]
Or. Gymnophiona Rafinesque 1814 [caecilian]
Or. Urodela Duméril 1805
Infracl. Diapsida Osborn 1903 [diapsid]
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G. †Coelurosauravus Piveteau 1926
Batrachosauria Efremov 1946
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Subor. †Seymouriamorpha Watson 1917
Tetrapoda Goodrich 1930 [tetrapod]
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Nectridea Miall 1875
Therapsida Broom 1905 [therapsid]
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Therocephalia Broom 1903