Opinions from E. D. Cope 1870
- 'Adocus belongs to Emydinae'
- 'Adocus agilis belongs to Adocus'
- 'Adocus petrosus belongs to Adocus' according to Cope 1868
- 'Adocus petrosus is recombined as Emys petrosus'
- 'Archosauria belongs to Reptilia'
- 'Astrodon belongs to Orthopoda'
- 'Aublysodon belongs to Goniopoda'
- 'Bathygnathus belongs to Goniopoda'
- 'Bathygnathus borealis belongs to Bathygnathus'
- 'Bottosaurus tuberculatus belongs to Bottosaurus'
- 'Catapleura belongs to Chelydrinae'
- 'Chelone breviceps is recombined as Puppigerus breviceps'
- 'Chelone convexa is recombined as Puppigerus convexus'
- 'Chelone grandaeva is recombined as Puppigerus grandaevus'
- 'Chelone latiscutata is recombined as Puppigerus latiscutatus'
- 'Chelone longiceps is recombined as Puppigerus longiceps'
- 'Chelone ornata is recombined as Peritresius ornatus'
- 'Chelone parvitecta belongs to Chelone'
- 'Chelone sopita is recombined as Propleura sopita'
- 'Chelone trigoniceps is recombined as Puppigerus trigoniceps'
- 'Cistudo belongs to Emydinae'
- 'Cistudo eurypygia belongs to Cistudo'
- 'Clepsysaurus belongs to Dinosauria'
- 'Clepsysaurus pennsylvanicus belongs to Clepsysaurus'
- 'Clidastes belongs to Clidastidae'
- 'Clidastes iguanavus belongs to Clidastes'
- 'Clidastes propython belongs to Clidastes'
- 'Coelosaurus belongs to Goniopoda'
- 'Coelosaurus antiquus belongs to Coelosaurus'
- 'Compsognathus belongs to Symphypoda'
- 'Compsognathus longipes [misspelled as Compsognathus gracilis] belongs to Compsognathus'
- 'Crocodilus basitruncatus is recombined as Holops basitruncatus'
- 'Dinodon is a subjective synonym of Aublysodon'
- 'Deinodon horridus is recombined as Aublysodon horridus'
- 'Dicynodon rosmarus belongs to Dicynodon'
- 'Digerrhum belongs to Sternothaeridae'
- 'Dinophis grandis is recombined as Palaeophis grandis'
- 'Dinosauria is corrected as Dinosauria and belongs to Archosauria'
- 'Diplotomodon belongs to Goniopoda'
- 'Emys beatus is recombined as Adocus beatus'
- 'Emys pravus is recombined as Adocus pravus'
- 'Emys turgidus belongs to Emys'
- 'Emys wyomingensis belongs to Emys'
- 'Euclastes belongs to Chelydrinae'
- 'Euclastes platyops belongs to Euclastes'
- 'Hadrosauridae belongs to Orthopoda'
- 'Hadrosaurus minor belongs to Hadrosaurus'
- 'Hadrosaurus tripos belongs to Hadrosaurus'
- 'Halisaurus fraternus is recombined as Baptosaurus fraternus'
- 'Hylaeosaurus armatus belongs to Hylaeosaurus'
- 'Hypsibema belongs to Dinosauria'
- 'Hypsibema crassicauda belongs to Hypsibema'
- 'Iguanodon anglicum is corrected as Iguanodon anglicus and belongs to Iguanodon'
- 'Iguanodontidae belongs to Orthopoda'
- 'Laelaps aquilunguis belongs to Laelaps'
- 'Laelaps gallicus is recombined as Poicilopleurum gallicum'
- 'Laelaps macropus belongs to Laelaps'
- 'Lembonax belongs to Testudinata'
- 'Lembonax polemicus belongs to Lembonax'
- 'Liodon congrops belongs to Liodon'
- 'Lytoloma belongs to Chelydrinae'
- 'Lytoloma angusta belongs to Lytoloma'
- 'Lytoloma jeanesii belongs to Lytoloma'
- 'Macrosaurus platyspondylus is recombined as Baptosaurus platyspondylus'
- 'Macrosaurus proriger is recombined as Liodon proriger'
- 'Megadactylus belongs to Dinosauria'
- 'Megadactylus polyzelus belongs to Megadactylus'
- 'Megalosaurus bucklandii belongs to Megalosaurus'
- 'Mosasauridae belongs to Pythonomorpha'
- 'Mosasaurus depressus belongs to Mosasaurus'
- 'Mosasaurus fulciatus belongs to Mosasaurus'
- 'Mosasaurus maximus belongs to Mosasaurus'
- 'Mosasaurus oarthrus belongs to Mosasaurus'
- 'Nectoportheus validus belongs to Nectoportheus' according to Cope 1868
- 'Nectoportheus validus is recombined as Liodon validus'
- 'Ornithotarsus belongs to Symphypoda'
- 'Ornithotarsus immanis belongs to Ornithotarsus'
- 'Orthopoda belongs to Dinosauria'
- 'Osteopygis belongs to Chelydrinae'
- 'Osteopygis chelydrinus belongs to Osteopygis'
- 'Osteopygis emarginatus is corrected as Osteopygis emarginata and belongs to Osteopygis'
- 'Osteopygis platylomus belongs to Osteopygis'
- 'Osteopygis repandus is recombined as Catapleura repanda'
- 'Palaeophis halidanus belongs to Palaeophis'
- 'Palaeophis littoralis belongs to Palaeophis'
- 'Peritresius belongs to Chelydrinae'
- 'Platecarpus belongs to Mosasauridae'
- 'Platecarpus tympaniticus belongs to Platecarpus'
- 'Platemys bullockii is recombined as Digerrhum bullockii'
- 'Pleurosternum pectorale belongs to Pleurosternum'
- 'Poekilopleuron bucklandii [misspelled as Poecilopleurum bucklandii] belongs to Poecilopleurum'
- 'Polacanthus [misspelled as Polyacanthus] belongs to Dinosauria'
- 'Propleura belongs to Chelydrinae'
- 'Pterodactylus longispinis is recombined as Rhabdopelix longispinis'
- 'Puppigerus belongs to Cheloniidae'
- 'Rhabdopelix belongs to Pterosauria'
- 'Scelidosauridae belongs to Orthopoda'
- 'Scelidosaurus harrisonii belongs to Scelidosaurus'
- 'Sternothaeridae belongs to Pleurodira'
- 'Symphypoda was reranked as a suborder and belongs to Dinosauria'
- 'Taphrosphys belongs to Podocnemididae'
- 'Taphrosphys leslianus belongs to Taphrosphys'
- 'Taphrosphys longinuchus belongs to Taphrosphys'
- 'Taphrosphys molops belongs to Taphrosphys'
- 'Taphrosphys nodosus belongs to Taphrosphys'
- 'Taphrosphys strenuus belongs to Taphrosphys'
- 'Teratosaurus belongs to Dinosauria'
- 'Teratosaurus suevicus belongs to Teratosaurus'
- 'Tomodon horrificus is recombined as Diplotomodon horrificus'
- 'Trionyx buiei belongs to Trionyx'
- 'Trionyx halophilus belongs to Trionyx'
- 'Trionyx lima belongs to Trionyx'
- 'Trionyx pennatus belongs to Trionyx'
- 'Troodon belongs to Goniopoda'
- 'Troodon formosus belongs to Troodon'