Opinions from R. Owen 1842
- 'Batrachia was reranked as a order and belongs to Reptilia'
- 'Cetiosaurus belongs to Crocodilia'
- 'Cetiosaurus brachyurus belongs to Cetiosaurus'
- 'Cetiosaurus brevis belongs to Cetiosaurus'
- 'Cetiosaurus epioolithicus belongs to Cetiosaurus'
- 'Cetiosaurus hypoolithicus belongs to Cetiosaurus'
- 'Cetiosaurus longus belongs to Cetiosaurus'
- 'Cetiosaurus medius belongs to Cetiosaurus'
- 'Chelone belongs to Chelonidae'
- 'Chelone breviceps belongs to Chelone'
- 'Chelone convexa belongs to Chelone'
- 'Chelone convexa is recombined as Argillochelys convexa' according to Owen 1842
- 'Chelone latiscutata belongs to Chelone'
- 'Chelone longiceps belongs to Chelone'
- 'Chelone obovata belongs to Chelone'
- 'Chelone planiceps belongs to Chelone'
- 'Chelone planimentum belongs to Chelone'
- 'Chelone pulchriceps belongs to Chelone'
- 'Chelone subcristata belongs to Chelone'
- 'Cheloniidae [misspelled as Chelonidae] belongs to Chelonia'
- 'Chirotherium herculis [misspelled as Cheirotherium hercules] belongs to Cheirotherium'
- 'Cladeiodon [misspelled as Cladyodon] belongs to Lacertilia'
- 'Cladeiodon lloydii [misspelled as Cladyodon lloydii] belongs to Cladyodon'
- 'Crocodilus cultridens is recombined as Suchosaurus cultridens'
- 'Crocodilus cultridens belongs to Crocodilus' according to R. Owen 1841
- 'Crocodilus priscus belongs to Crocodilus' according to Soemmering 1815
- 'Crocodilus priscus is recombined as Teleosaurus priscus'
- 'Crocodilus spenceri belongs to Crocodilus'
- 'Crocodylus [misspelled as Crocodilus] belongs to Crocodilia'
- 'Crocodylus acutus [misspelled as Crocodilus acutus] belongs to Crocodilus'
- 'Dinosauria belongs to Reptilia'
- 'Emydidae belongs to Chelonia'
- 'Emys belongs to Emydidae'
- 'Emys benstedi is recombined as Chelone benstedi'
- 'Emys parkinsonii is a subjective synonym of Chelone longiceps'
- 'Emys testudiniformis belongs to Emys'
- 'Enaliosauri is corrected as Enaliosauria and belongs to Reptilia'
- 'Goniopholis belongs to Crocodilia'
- 'Goniopholis crassidens belongs to Goniopholis'
- 'Hylaeosaurus belongs to Dinosauria'
- 'Hylaeosaurus armatus belongs to Hylaeosaurus'
- 'Iguanodon belongs to Dinosauria'
- 'Iguanodon mantelli belongs to Iguanodon'
- 'Labyrinthodon belongs to Batrachia'
- 'Labyrinthodon leptognathus belongs to Labyrinthodon'
- 'Labyrinthodon salamandroides belongs to Labyrinthodon'
- 'Labyrinthodon scutulatus belongs to Labyrinthodon'
- 'Labyrinthodon ventricosus belongs to Labyrinthodon'
- 'Leiodon belongs to Lacertilia'
- 'Mastodonsaurus is replaced by Labyrinthodon'
- 'Megalosaurus belongs to Dinosauria'
- 'Mosasaurus belongs to Lacertilia'
- 'Mosasaurus hoffmannii belongs to Mosasaurus'
- 'Ophidia belongs to Reptilia'
- 'Ornithocephalus brevirostris is recombined as Pterodactylus brevirostris'
- 'Palaeophis belongs to Ophidia'
- 'Palaeophis toliapicus belongs to Palaeophis'
- 'Palaeosaurus belongs to Lacertilia'
- 'Palaeosaurus cylindricum is corrected as Palaeosaurus cylindrodon and belongs to Palaeosaurus'
- 'Palaeosaurus platyodon belongs to Palaeosaurus'
- 'Phytosaurus cylindricodon belongs to Phytosaurus'
- 'Platemys belongs to Emydidae'
- 'Platemys bowerbankii belongs to Platemys'
- 'Platemys bullockii belongs to Platemys'
- 'Platemys mantelli belongs to Platemys'
- 'Plesiosaurus (Pleiosaurus) was reranked as Pliosaurus and belongs to Enaliosauria'
- 'Plesiosaurus (Pleiosaurus) brachydeirus is recombined as Pliosaurus brachydeirus'
- 'Plesiosaurus grandis is recombined as Pliosaurus grandis'
- 'Plesiosaurus trochanterius is recombined as Pliosaurus trochanterius'
- 'Poekilopleuron [misspelled as Poikilopleuron] belongs to Crocodilia'
- 'Poekilopleuron bucklandii [misspelled as Poikilopleuron bucklandi] belongs to Poikilopleuron'
- 'Polyptychodon belongs to Reptilia'
- 'Pterodactylus belongs to Pterosauria'
- 'Pterodactylus grandis belongs to Pterodactylus'
- 'Pterodactylus longirostris belongs to Pterodactylus'
- 'Pterodactylus macronyx belongs to Pterodactylus'
- 'Pterodactylus medius belongs to Pterodactylus'
- 'Raphiosaurus belongs to Lacertilia'
- 'Raphiosaurus subulidens belongs to Raphiosaurus'
- 'Rhynchosaurus belongs to Lacertilia'
- 'Rysosteus belongs to Reptilia'
- 'Steneosaurus belongs to Crocodilia'
- 'Steneosaurus rostromajor is recombined as Streptospondylus rostromajor'
- 'Steneosaurus rostrominor belongs to Steneosaurus'
- 'Streptospondylus belongs to Crocodilia'
- 'Streptospondylus cuvieri belongs to Streptospondylus'
- 'Streptospondylus major belongs to Streptospondylus'
- 'Suchosaurus belongs to Crocodilia'
- 'Teleosaurus belongs to Crocodilia'
- 'Teleosaurus asthenodeirus belongs to Teleosaurus'
- 'Teleosaurus cadomensis belongs to Teleosaurus'
- 'Teleosaurus chapmanni belongs to Teleosaurus'
- 'Testudinidae belongs to Chelonia'
- 'Testudo duncani belongs to Testudo'
- 'Testudo mydas is recombined as Chelone mydas'
- 'Thecodontosaurus belongs to Lacertilia'
- 'Tretosternon belongs to Emydidae'
- 'Tretosternon punctatum belongs to Tretosternon'
- 'Trionyx belongs to Emydidae'