Opinions from H. F. Osborn 1904
- 'Aetosauria belongs to Parasuchia'
- 'Anomodontia was reranked as a superorder and belongs to Synapsida'
- 'Cetiosauria is a subjective synonym of Opisthocoelia'
- 'Choristodera belongs to Diaptosauria'
- 'Cistecephalidae belongs to Dicynodontia'
- 'Compsognatha is a subjective synonym of Symphypoda'
- 'Cotylosauria was reranked as a order and belongs to Synapsida'
- 'Crocodilia belongs to Diaptosauria'
- 'Cryptodira belongs to Testudinata'
- 'Cynodontia was reranked as a suborder and belongs to Theriodontia'
- 'Diadectidae belongs to Cotylosauria'
- 'Diapsida belongs to Reptilia'
- 'Diaptosauria belongs to Diapsida'
- 'Dicynodontia belongs to Anomodontia'
- 'Dicynodontidae belongs to Dicynodontia'
- 'Dinosauria was reranked as a superorder and belongs to Diapsida'
- 'Endothiodontidae belongs to Dicynodontia'
- 'Eusuchia belongs to Crocodilia'
- 'Gnathodontia was reranked as a order and belongs to Diaptosauria'
- 'Ichthyopterygia is a subjective synonym of Ichthyosauria'
- 'Ichthyosauria belongs to Diaptosauria'
- 'Lacertilia belongs to Squamata'
- 'Lystrosauridae belongs to Dicynodontia'
- 'Megalosauria was reranked as a suborder and belongs to Theropoda'
- 'Mesosuchia belongs to Crocodilia'
- 'Mosasauria belongs to Squamata'
- 'Nothosauria is a subjective synonym of Simosauria'
- 'Ophidia belongs to Squamata'
- 'Opisthocoelia was reranked as a order and belongs to Dinosauria'
- 'Orthopoda was reranked as a order and belongs to Dinosauria'
- 'Parasuchia was reranked as a order and belongs to Diaptosauria'
- 'Pareiasauria is a subjective synonym of Cotylosauria'
- 'Pareiasauridae belongs to Cotylosauria'
- 'Pariotichidae belongs to Cotylosauria'
- 'Pelycosauria belongs to Diaptosauria'
- 'Phytosauria belongs to Parasuchia'
- 'Placodontia belongs to Anomodontia'
- 'Plesiosauria was reranked as a suborder and belongs to Sauropterygia'
- 'Pleurodira belongs to Testudinata'
- 'Predentata is a subjective synonym of Orthopoda'
- 'Procolophonia was reranked as a order and belongs to Diaptosauria'
- 'Proganosauria belongs to Diaptosauria'
- 'Protorosauria belongs to Diaptosauria'
- 'Pterosauria belongs to Diapsida'
- 'Rhynchocephalia belongs to Diaptosauria'
- 'Sauropoda is a subjective synonym of Opisthocoelia'
- 'Sauropterygia was reranked as a order and belongs to Anomodontia'
- 'Simosauria belongs to Sauropterygia'
- 'Squamata was reranked as a superorder and belongs to Diapsida'
- 'Symphypoda was reranked as a suborder and belongs to Theropoda'
- 'Synapsida belongs to Reptilia'
- 'Testudinata belongs to Anomodontia'
- 'Thalattosuchia belongs to Crocodilia'
- 'Thecodontia is a subjective synonym of Megalosauria'
- 'Theriodontia belongs to Anomodontia'
- 'Therocephalia was reranked as a suborder and belongs to Theriodontia'
- 'Theromorpha is a subjective synonym of Anomodontia'
- 'Theropoda belongs to Dinosauria'
- 'Trionychia belongs to Testudinata'