Opinions from R. Estes 1964
- 'Acipenser belongs to Acipenseridae'
- 'Acipenseridae belongs to Acipenseriformes'
- 'Acipenseriformes belongs to Osteichthyes'
- 'Adelphesiren olivae is a subjective synonym of Habrosaurus dilatus'
- 'Albulidae belongs to Clupeoidei'
- 'Alethesaurus quadratus is a subjective synonym of Chamops segnis'
- 'Alligatorinae belongs to Crocodylidae'
- 'Amia (Protamia) was reranked as Protamia and belongs to Amiidae'
- 'Amiidae belongs to Amiiformes'
- 'Amiiformes belongs to Osteichthyes'
- 'Amphichelydia belongs to Testudinata'
- 'Anatosaurus belongs to Hadrosauridae'
- 'Anguidae belongs to Diploglossa'
- 'Anguimorpha belongs to Sauria'
- 'Aniliidae belongs to Booidea'
- 'Ascaphidae belongs to Salientia'
- 'Aspideretes belongs to Trionychidae'
- 'Aspideretes beecheri belongs to Aspideretes'
- 'Aspidorhynchidae belongs to Aspidorhynchiformes'
- 'Aspidorhynchiformes belongs to Osteichthyes'
- 'Aspidorhynchus belongs to Aspidorhynchidae'
- 'Baena belongs to Baenidae'
- 'Baena cephalica is recombined as Eubaena cephalica'
- 'Baenidae belongs to Baenoidea'
- 'Baenoidea belongs to Amphichelydia'
- 'Barbourula belongs to Discoglossidae'
- 'Basilemys belongs to Dermatemydidae'
- 'Belonostomus belongs to Aspidorhynchidae'
- 'Booidea belongs to Ophidia'
- 'Brachychampsa belongs to Alligatorinae'
- 'Brachychampsa montana belongs to Brachychampsa'
- 'Carnosauria belongs to Theropoda'
- 'Ceratodus eruciferus is recombined as Acipenser eruciferus'
- 'Ceratodus hieroglyphus is a subjective synonym of Acipenser eruciferus'
- 'Ceratopsia belongs to Ornithischia'
- 'Ceratopsidae belongs to Ceratopsia'
- 'Chamops belongs to Teiidae'
- 'Chamops denticulatus is recombined as Leptochamops denticulatus'
- 'Chamops segnis belongs to Chamops'
- 'Champsosauridae belongs to Choristodera'
- 'Champsosaurus belongs to Champsosauridae'
- 'Choristodera belongs to Eosuchia'
- 'Clupeiformes belongs to Osteichthyes'
- 'Clupeoidei belongs to Clupeiformes'
- 'Coeluridae belongs to Coelurosauria'
- 'Coelurosauria belongs to Theropoda'
- 'Colpodontosaurus belongs to Diploglossa'
- 'Colpodontosaurus cracens belongs to Colpodontosaurus'
- 'Compsemys belongs to Dermatemydidae'
- 'Compsemys victus is corrected as Compsemys victa and belongs to Compsemys'
- 'Coniophis belongs to Aniliidae'
- 'Coniophis precedens belongs to Coniophis'
- 'Crocodilia belongs to Reptilia'
- 'Crocodylidae belongs to Eusuchia'
- 'Crocodylinae belongs to Crocodylidae'
- 'Cryptobranchoidea belongs to Urodeles'
- 'Cryptodira belongs to Testudinata'
- 'Cuttysarkus belongs to Sauria'
- 'Cuttysarkus mcnallyi belongs to Cuttysarkus'
- 'Dasyatidae belongs to Rajiformes'
- 'Dermatemydidae belongs to Testudinoidea'
- 'Desmognathinae belongs to Plethodontidae'
- 'Diphyodus is a subjective synonym of Belonostomus'
- 'Diphyodus longirostris is recombined as Belonostomus longirostris'
- 'Diploglossa belongs to Anguimorpha'
- 'Discoglossidae belongs to Salientia'
- 'Dryptosaurus belongs to Megalosauridae'
- 'Elopidae belongs to Clupeoidei'
- 'Emydinae belongs to Testudinidae'
- 'Eosuchia was reranked as a order and belongs to Reptilia'
- 'Eubaena belongs to Eubaenidae'
- 'Eubaenidae belongs to Baenoidea'
- 'Eusuchia belongs to Crocodilia'
- 'Exostinus belongs to Xenosauridae'
- 'Exostinus lancensis belongs to Exostinus'
- 'Ganopristinae belongs to Pristidae'
- 'Gerrhonotidae was reranked as the subfamily Gerrhonotinae and belongs to Anguidae'
- 'Gerrhonotus belongs to Gerrhonotidae'
- 'Habrosaurus belongs to Sirenidae'
- 'Habrosaurus dilatus belongs to Habrosaurus'
- 'Hadrosauridae belongs to Ornithopoda'
- 'Haptosphenus belongs to Teiidae'
- 'Haptosphenus placodon belongs to Haptosphenus'
- 'Harpagosaurus parvus is a subjective synonym of Exostinus lancensis'
- 'Hedronchus sternbergi is a subjective synonym of Scapherpeton tectum'
- 'Helopanoplia distincta belongs to Helopanoplia'
- 'Hemitrypus jordanianus is a subjective synonym of Scapherpeton tectum'
- 'Hybodontes is corrected as Hybodontidae and belongs to Heterodontiformes'
- 'Hylidae belongs to Neobatrachia'
- 'Hypsilophodontidae belongs to Ornithopoda'
- 'Iguanavus teres is a subjective synonym of Chamops segnis'
- 'Ischyrhiza belongs to Ganopristinae'
- 'Ischyrhiza avonicola belongs to Ischyrhiza'
- 'Kindleia belongs to Amiidae'
- 'Kindleia fragosa belongs to Kindleia'
- 'Lanceosaurus compressus is a subjective synonym of Chamops segnis'
- 'Lanceosaurus hatcheri is a subjective synonym of Chamops segnis'
- 'Leidyosuchus belongs to Crocodylinae'
- 'Leidyosuchus sternbergii [misspelled as Leidyosuchus sternbergi] belongs to Leidyosuchus'
- 'Lepidotus occidentalis is recombined as Lepisosteus occidentalis'
- 'Lepisosteidae belongs to Lepisosteiformes'
- 'Lepisosteiformes belongs to Osteichthyes'
- 'Lepisosteus belongs to Lepisosteidae'
- 'Leptochamops belongs to Teiidae'
- 'Leptodactylidae belongs to Neobatrachia'
- 'Litakis belongs to Anguimorpha'
- 'Litakis gilmorei belongs to Litakis'
- 'Lonchidion belongs to Hybodontidae'
- 'Lonchidion selachos belongs to Lonchidion'
- 'Meantes belongs to Urodeles'
- 'Megalosauri is corrected as Megalosauridae and belongs to Carnosauria'
- 'Meniscognathus belongs to Teiidae'
- 'Meniscognathus altmani belongs to Meniscognathus'
- 'Myledaphus belongs to Dasyatidae'
- 'Myledaphus bipartitus belongs to Myledaphus'
- 'Neobatrachia belongs to Salientia'
- 'Odaxosaurus obliquus is a subjective synonym of Peltosaurus piger'
- 'Ophidia belongs to Reptilia'
- 'Opisthotriton belongs to Desmognathinae'
- 'Opisthotriton kayi belongs to Opisthotriton'
- 'Ornithischia belongs to Reptilia'
- 'Ornithomimidae belongs to Coelurosauria'
- 'Ornithomimus belongs to Ornithomimidae'
- 'Ornithopoda belongs to Ornithischia'
- 'Pachycephalosauridae belongs to Ornithopoda'
- 'Pachycephalosaurus belongs to Pachycephalosauridae'
- 'Palaeosaniwa belongs to Varanidae'
- 'Palaeosaniwa canadensis belongs to Palaeosaniwa'
- 'Paraderma belongs to Parasaniwidae'
- 'Paraderma bogerti belongs to Paraderma'
- 'Parasaniwa belongs to Parasaniwidae'
- 'Parasaniwa obtusa is a subjective synonym of Parasaniwa wyomingensis'
- 'Parasaniwa wyomingensis belongs to Parasaniwa'
- 'Parasaniwidae belongs to Varanoidea'
- 'Paronychodon belongs to Coeluridae'
- 'Paronychodon lacustris belongs to Paronychodon'
- 'Pelobatidae belongs to Salientia'
- 'Peltosaurus belongs to Gerrhonotidae'
- 'Peltosaurus piger belongs to Peltosaurus'
- 'Perciformes belongs to Osteichthyes'
- 'Platacodon belongs to Sciaenidae'
- 'Platacodon nanus belongs to Platacodon'
- 'Platynota belongs to Anguimorpha'
- 'Plethodontidae belongs to Salamandroidea'
- 'Prionosaurus regularis is a subjective synonym of Exostinus lancensis'
- 'Pristidae belongs to Rajiformes'
- 'Prodesmodon belongs to Desmognathinae'
- 'Prodesmodon copei belongs to Prodesmodon'
- 'Pseudemys belongs to Emydinae'
- 'Pterosauria belongs to Reptilia'
- 'Salamandroidea belongs to Urodeles'
- 'Salientia belongs to Amphibia'
- 'Sauria was reranked as a suborder and belongs to Reptilia'
- 'Saurischia belongs to Reptilia'
- 'Sauriscus belongs to Scincidae'
- 'Sauriscus cooki belongs to Sauriscus'
- 'Saurornithoides belongs to Coeluridae'
- 'Scapherpeton belongs to Scapherpetonidae'
- 'Scapherpeton tectum belongs to Scapherpeton'
- 'Scapherpetonidae belongs to Cryptobranchoidea'
- 'Sciaenoidei was reranked as the family Sciaenidae and belongs to Perciformes'
- 'Scincidae belongs to Scincomorpha'
- 'Scincomorpha was reranked as a suborder and belongs to Sauria'
- 'Sirenidae belongs to Meantes'
- 'Squatirhina belongs to Orectolobidae'
- 'Squatirhina americana belongs to Squatirhina'
- 'Stylomyleodon lacus is a subjective synonym of Kindleia fragosa'
- 'Teiidae belongs to Scincomorpha'
- 'Testudinata was reranked as a subclass and belongs to Reptilia'
- 'Testudinidae belongs to Trionychoidea'
- 'Testudinoidea belongs to Cryptodira'
- 'Theropoda belongs to Saurischia'
- 'Thescelosaurus belongs to Hypsilophodontidae'
- 'Thescelosaurus neglectus belongs to Thescelosaurus'
- 'Thescelus insiliens belongs to Thescelus'
- 'Triceratops belongs to Ceratopsidae'
- 'Trionychidae belongs to Trionychoidea'
- 'Trionychoidea belongs to Cryptodira'
- 'Tripriodon is a subjective synonym of Paronychodon'
- 'Tripriodon caperatus is a subjective synonym of Paronychodon lacustris'
- 'Tyrannosauridae belongs to Carnosauria'
- 'Tyrannosaurus belongs to Tyrannosauridae'
- 'Tyrannosaurus rex belongs to Tyrannosaurus'
- 'Urodeles was reranked as the order Urodela and belongs to Amphibia'
- 'Varanidae belongs to Varanoidea'
- 'Varanoidea belongs to Platynota'
- 'Xenosauridae belongs to Diploglossa'
- 'Zapsalis is a subjective synonym of Paronychodon'
- 'Zapsalis abradens is a subjective synonym of Paronychodon lacustris'