Opinions from J. A. Gauthier et al. 1989
- 'Amniota was reranked as a unranked clade and belongs to Cotylosauria'
- 'Amphibia belongs to Tetrapoda'
- 'Anapsida belongs to Reptilia'
- 'Anthracosauria belongs to Tetrapoda'
- 'Anthracosauroidea belongs to Anthracosauria'
- 'Anuri was reranked as the suborder Anura and belongs to Lissamphibia'
- 'Araeoscelida [misspelled as Araeoscelidia] belongs to Diapsida'
- 'Araripesuchus belongs to Crocodyliformes'
- 'Archaeopteryx belongs to Coelurosauria'
- 'Archosauria was reranked as a unranked clade and belongs to Archosauriformes'
- 'Archosauriformes belongs to Archosauromorpha'
- 'Archosauromorpha was reranked as a unranked clade and belongs to Sauria'
- 'Aves was reranked as a infraclass and belongs to Coelurosauria'
- 'Bernissartia belongs to Crocodyliformes'
- 'Biarmosuchia belongs to Therapsida'
- 'Branchiosaurus belongs to Temnospondyli'
- 'Caenagnathidae belongs to Coelurosauria'
- 'Captorhinidae belongs to Anapsida'
- 'Carnosauria was reranked as a infraorder and belongs to Theropoda'
- 'Casea belongs to Synapsida'
- 'Cerastosauria was reranked as the unranked clade Ceratosauria and belongs to Theropoda'
- 'Chelonii was reranked as the unranked clade Chelonia and belongs to Testudines'
- 'Choristodera belongs to Archosauromorpha'
- 'Coelurosauravus belongs to Diapsida'
- 'Coelurosauria was reranked as a unranked clade and belongs to Theropoda'
- 'Colosteidae belongs to Temnospondyli'
- 'Compsognathus belongs to Theropoda'
- 'Crocodilia was reranked as the unranked clade Crocodylia and belongs to Crocodyliformes'
- 'Crocodilomorphi was reranked as the unranked clade Crocodylomorpha and belongs to Pseudosuchia'
- 'Crocodyliformes belongs to Crocodilomorphi'
- 'Cynodontia was reranked as a infraorder and belongs to Therapsida'
- 'Deinonychus belongs to Coelurosauria'
- 'Dendrerpeton belongs to Temnospondyli'
- 'Diadectomorpha belongs to Anthracosauria'
- 'Diademodon belongs to Cynodontia'
- 'Diapsida was reranked as a unranked clade and belongs to Romeriida'
- 'Dicynodontia is corrected as Dicynodontia and belongs to Therapsida'
- 'Dinocephalia belongs to Therapsida'
- 'Dinosauria was reranked as a unranked clade and belongs to Ornithosuchia'
- 'Edops belongs to Temnospondyli'
- 'Eryops belongs to Temnospondyli'
- 'Erythrosuchus belongs to Archosauriformes'
- 'Euparkeria belongs to Ornithosuchia'
- 'Exaeretodon belongs to Cynodontia'
- 'Goniopholididae [misspelled as Goniopholidae] belongs to Crocodyliformes'
- 'Gorgonopsia belongs to Therapsida'
- 'Greererpeton belongs to Colosteidae'
- 'Gymnophiona belongs to Lissamphibia'
- 'Haptodus belongs to Synapsida'
- 'Herrerasaurus belongs to Ornithosuchia'
- 'Hesperornithiformes belongs to Coelurosauria'
- 'Kayentachelys belongs to Testudines'
- 'Kuehneosauridae belongs to Lepidosauromorpha'
- 'Lagosuchus belongs to Ornithosuchia'
- 'Lepidosauria was reranked as a unranked clade and belongs to Lepidosauromorpha'
- 'Lepidosauromorpha was reranked as a unranked clade and belongs to Sauria'
- 'Lissamphibia was reranked as a unranked clade and belongs to Temnospondyli'
- 'Loxommatidae belongs to Amphibia'
- 'Mammalia was reranked as a unranked clade and belongs to Cynodontia'
- 'Mesosauria belongs to Amniota'
- 'Microsauria belongs to Tetrapoda'
- 'Millerettidae belongs to Amniota'
- 'Morganucodontidae belongs to Cynodontia'
- 'Nectridea was reranked as a unranked clade and belongs to Tetrapoda'
- 'Notosuchus belongs to Crocodyliformes'
- 'Ophiacodon belongs to Synapsida'
- 'Ornithischia was reranked as a unranked clade and belongs to Dinosauria'
- 'Ornithomimidae belongs to Coelurosauria'
- 'Ornithosuchia was reranked as a unranked clade and belongs to Archosauria'
- 'Ornithosuchidae belongs to Ornithosuchia'
- 'Palaeagama belongs to Lepidosauromorpha'
- 'Paleothyris belongs to Romeriida'
- 'Paliguana belongs to Lepidosauromorpha'
- 'Pareiasauria belongs to Amniota'
- 'Phytosauridae belongs to Pseudosuchia'
- 'Postosuchus belongs to Pseudosuchia'
- 'Procolophonia was reranked as a unranked clade and belongs to Amniota'
- 'Procynosuchus belongs to Cynodontia'
- 'Proganochelys belongs to Testudines'
- 'Proterosuchidae belongs to Archosauriformes'
- 'Protorosauria belongs to Archosauromorpha'
- 'Protosuchidae belongs to Crocodyliformes'
- 'Pseudhesperosuchus belongs to Crocodilomorphi'
- 'Pseudosuchia was reranked as a unranked clade and belongs to Archosauria'
- 'Pterosauria belongs to Ornithosuchia'
- 'Reptilia was reranked as a class and belongs to Amniota'
- 'Rhynchosauria belongs to Archosauromorpha'
- 'Romeriida belongs to Reptilia'
- 'Sauria belongs to Diapsida'
- 'Saurischia was reranked as a unranked clade and belongs to Dinosauria'
- 'Sauropodomorpha was reranked as a unranked clade and belongs to Saurischia'
- 'Saurosternon belongs to Lepidosauromorpha'
- 'Seymouriamorpha belongs to Batrachosauria'
- 'Sphenodontinae belongs to Synapsida'
- 'Sphenosuchus belongs to Crocodilomorphi'
- 'Synapsida was reranked as a unranked clade and belongs to Amniota'
- 'Temnospondyli belongs to Amphibia'
- 'Terrestrisuchus belongs to Pseudosuchia'
- 'Tersomius belongs to Temnospondyli'
- 'Testudines belongs to Anapsida'
- 'Therocephalia was reranked as a unranked clade and belongs to Therapsida'
- 'Theropoda was reranked as a unranked clade and belongs to Saurischia'
- 'Thrinaxodon belongs to Cynodontia'
- 'Ticinosuchus belongs to Pseudosuchia'
- 'Trilophosaurus belongs to Archosauromorpha'
- 'Tritylodontidae belongs to Cynodontia'
- 'Urodeles was reranked as the order Urodela and belongs to Lissamphibia'
- 'Younginiformes belongs to Lepidosauromorpha'