Opinions from O. C. Marsh 1896
- 'Acanthopholis belongs to Scelidosauridae'
- 'Aepisaurus belongs to Sauropoda'
- 'Agathaumas belongs to Ceratopsidae'
- 'Allosaurus belongs to Dryptosauridae'
- 'Allosaurus ferox belongs to Allosaurus'
- 'Ammosaurus belongs to Anchisauridae'
- 'Amphicoelias is a subjective synonym of Camarasaurus'
- 'Anchisauridae belongs to Theropoda'
- 'Anchisaurus belongs to Anchisauridae'
- 'Anchisaurus colurus belongs to Anchisaurus'
- 'Anchisaurus major is recombined as Ammosaurus major'
- 'Anchisaurus solus belongs to Anchisaurus'
- 'Apatosaurus belongs to Atlantosauridae'
- 'Apatosaurus ajax belongs to Apatosaurus'
- 'Apatosaurus grandis is recombined as Morosaurus grandis'
- 'Apatosaurus laticollis belongs to Apatosaurus'
- 'Arctosaurus belongs to Anchisauridae'
- 'Argyrosaurus belongs to Titanosauridae'
- 'Astrodon belongs to Pleurocoelidae'
- 'Astrodon johnstoni belongs to Astrodon'
- 'Atlantosauridae belongs to Sauropoda'
- 'Atlantosaurus belongs to Atlantosauridae'
- 'Atlantosaurus immanis belongs to Atlantosaurus'
- 'Barosaurus belongs to Atlantosauridae'
- 'Barosaurus lentus belongs to Barosaurus'
- 'Bathygnathus belongs to Anchisauridae'
- 'Bathygnathus borealis belongs to Bathygnathus'
- 'Bothriospondylus belongs to Cardiodontidae'
- 'Brontosaurus belongs to Atlantosauridae'
- 'Brontosaurus amplus belongs to Brontosaurus'
- 'Brontosaurus excelsus belongs to Brontosaurus'
- 'Camarasaurus belongs to Morosauridae'
- 'Camptonotidae is replaced by Camptosauridae'
- 'Camptonotus is replaced by Camptosaurus'
- 'Camptonotus amplus is recombined as Camptosaurus amplus'
- 'Camptonotus dispar is recombined as Camptosaurus dispar'
- 'Camptosauridae belongs to Ornithopoda'
- 'Camptosaurus belongs to Camptosauridae'
- 'Camptosaurus medius belongs to Camptosaurus'
- 'Camptosaurus nanus belongs to Camptosaurus'
- 'Cardiodon belongs to Cardiodontidae'
- 'Cardiodontidae belongs to Sauropoda'
- 'Cerastosauria is corrected as Ceratosauria and belongs to Theropoda'
- 'Ceratops belongs to Ceratopsidae'
- 'Ceratops horridus is recombined as Triceratops horridus'
- 'Ceratopsia belongs to Predentata'
- 'Ceratopsidae belongs to Ceratopsia'
- 'Ceratosauridae belongs to Ceratosauria'
- 'Ceratosaurus belongs to Ceratosauridae'
- 'Ceratosaurus nasicornis belongs to Ceratosaurus'
- 'Cetiosaurus is a subjective synonym of Cardiodon'
- 'Cinodon is corrected as Cionodon and belongs to Trachodontidae'
- 'Claosauridae belongs to Ornithopoda'
- 'Claosaurus belongs to Claosauridae'
- 'Claosaurus annectens belongs to Claosaurus'
- 'Clepsysaurus belongs to Anchisauridae'
- 'Clepsysaurus pennsylvanicus belongs to Clepsysaurus'
- 'Coelosaurus belongs to Dryptosauridae'
- 'Coeluria belongs to Theropoda'
- 'Coeluridae belongs to Coeluria'
- 'Coelurus belongs to Coeluridae'
- 'Coelurus fragilis belongs to Coelurus'
- 'Compsognatha belongs to Theropoda'
- 'Compsognathidae belongs to Compsognatha'
- 'Compsognathus belongs to Compsognathidae'
- 'Compsognathus longipes belongs to Compsognathus'
- 'Crataeomus is a subjective synonym of Struthiosaurus'
- 'Creosaurus belongs to Dryptosauridae'
- 'Diclonius is a subjective synonym of Trachodon'
- 'Dimodosaurus belongs to Plateosauridae'
- 'Dinosauria belongs to Reptilia'
- 'Diplodocidae belongs to Sauropoda'
- 'Diplodocus belongs to Diplodocidae'
- 'Diplodocus longus belongs to Diplodocus'
- 'Diracodon belongs to Stegosauridae'
- 'Diracodon laticeps belongs to Diracodon'
- 'Dryosaurus belongs to Laosauridae'
- 'Dryptosauridae belongs to Theropoda'
- 'Dryptosaurus belongs to Dryptosauridae'
- 'Dystrophaeus belongs to Stegosauridae'
- 'Dystrophaeus viaemalae belongs to Dystrophaeus'
- 'Euskelesaurus belongs to Scelidosauridae'
- 'Hadrosauridae is a subjective synonym of Trachodontidae'
- 'Hadrosaurus is a subjective synonym of Trachodon'
- 'Hadrosaurus agilis is recombined as Claosaurus agilis'
- 'Hadrosaurus breviceps is recombined as Trachodon breviceps'
- 'Hallopidae belongs to Hallopoda'
- 'Hallopoda belongs to Theropoda'
- 'Hallopus belongs to Hallopidae'
- 'Hoplosaurus belongs to Sauropoda'
- 'Hylaeosaurus belongs to Scelidosauridae'
- 'Hypsilophodon belongs to Hypsilophodontidae'
- 'Hypsilophodon foxii belongs to Hypsilophodon'
- 'Hypsilophodontidae belongs to Ornithopoda'
- 'Hypsirophus is a subjective synonym of Stegosaurus'
- 'Iguanodon belongs to Iguanodontidae'
- 'Iguanodon bernissartensis belongs to Iguanodon'
- 'Iguanodontidae belongs to Ornithopoda'
- 'Labrosauridae belongs to Theropoda'
- 'Labrosaurus belongs to Labrosauridae'
- 'Labrosaurus sulcatus belongs to Labrosaurus'
- 'Laelaps is replaced by Dryptosaurus'
- 'Laosauridae belongs to Ornithopoda'
- 'Laosaurus belongs to Laosauridae'
- 'Laosaurus altus is recombined as Dryosaurus altus'
- 'Laosaurus celer belongs to Laosaurus'
- 'Laosaurus consors belongs to Laosaurus'
- 'Laosaurus gracilis belongs to Laosaurus'
- 'Megadactylus is replaced by Anchisaurus'
- 'Megadactylus polyzelus is recombined as Anchisaurus polyzelus'
- 'Megalosauri is corrected as Megalosauridae and belongs to Theropoda'
- 'Megalosaurus belongs to Megalosauridae'
- 'Mochlodon belongs to Ornithopoda'
- 'Monoclonius belongs to Ceratopsidae'
- 'Morosauridae belongs to Sauropoda'
- 'Morosaurus belongs to Morosauridae'
- 'Morosaurus lentus belongs to Morosaurus'
- 'Morosaurus robustus belongs to Morosaurus'
- 'Nanosauridae belongs to Ornithopoda'
- 'Nanosaurus belongs to Nanosauridae'
- 'Nanosaurus agilis belongs to Nanosaurus'
- 'Nanosaurus rex belongs to Nanosaurus'
- 'Nanosaurus victor is recombined as Hallopus victor'
- 'Nodosauridae belongs to Stegosauria'
- 'Nodosaurus belongs to Nodosauridae'
- 'Nodosaurus textilis belongs to Nodosaurus'
- 'Omosaurus belongs to Stegosauridae'
- 'Omosaurus armatus belongs to Omosaurus'
- 'Ornithomimidae belongs to Ceratosauria'
- 'Ornithomimus belongs to Ornithomimidae'
- 'Ornithomimus grandis belongs to Ornithomimus'
- 'Ornithomimus minutus belongs to Ornithomimus'
- 'Ornithomimus sedens belongs to Ornithomimus'
- 'Ornithomimus velox belongs to Ornithomimus'
- 'Ornithopoda belongs to Predentata'
- 'Ornithopsis belongs to Cardiodontidae'
- 'Ornithotarsus belongs to Trachodontidae'
- 'Palaeosaurus belongs to Anchisauridae'
- 'Palaeoscincus belongs to Stegosauridae'
- 'Palaeoscincus costatus belongs to Palaeoscincus'
- 'Palaeoscincus latus belongs to Palaeoscincus'
- 'Pelorosaurus belongs to Cardiodontidae'
- 'Plateosauridae belongs to Theropoda'
- 'Plateosaurus belongs to Plateosauridae'
- 'Pleurocoelidae belongs to Sauropoda'
- 'Pleurocoelus belongs to Pleurocoelidae'
- 'Pleurocoelus montanus belongs to Pleurocoelus'
- 'Pleurocoelus nanus belongs to Pleurocoelus'
- 'Poikilopleuron is a subjective synonym of Megalosaurus'
- 'Polacanthus belongs to Scelidosauridae'
- 'Polyonax belongs to Ceratopsidae'
- 'Predentata belongs to Dinosauria'
- 'Priconodon belongs to Stegosauridae'
- 'Sauropoda belongs to Dinosauria'
- 'Scelidosauridae belongs to Stegosauria'
- 'Scelidosaurus belongs to Scelidosauridae'
- 'Scelidosaurus harrisonii belongs to Scelidosaurus'
- 'Sphenospondylus belongs to Ornithopoda'
- 'Stegosauria belongs to Predentata'
- 'Stegosauridae belongs to Stegosauria'
- 'Stegosaurus belongs to Stegosauridae'
- 'Stegosaurus duplex belongs to Stegosaurus'
- 'Stegosaurus stenops belongs to Stegosaurus'
- 'Stegosaurus sulcatus belongs to Stegosaurus'
- 'Stegosaurus ungulatus belongs to Stegosaurus'
- 'Sterrholophus belongs to Ceratopsidae'
- 'Struthiosaurus belongs to Ceratopsidae'
- 'Teratosaurus belongs to Plateosauridae'
- 'Thecodontosaurus belongs to Anchisauridae'
- 'Theropoda belongs to Dinosauria'
- 'Titanosauridae belongs to Sauropoda'
- 'Titanosaurus belongs to Titanosauridae'
- 'Titanosaurus montanus is recombined as Atlantosaurus montanus'
- 'Torosaurus belongs to Ceratopsidae'
- 'Torosaurus gladius belongs to Torosaurus'
- 'Torosaurus latus belongs to Torosaurus'
- 'Trachodon belongs to Trachodontidae'
- 'Trachodontidae belongs to Ornithopoda'
- 'Triceratops belongs to Ceratopsidae'
- 'Triceratops flabellatus is recombined as Sterrholophus flabellatus'
- 'Triceratops prorsus belongs to Triceratops'
- 'Triceratops serratus belongs to Triceratops'
- 'Vectisaurus belongs to Iguanodontidae'
- 'Zanclodon is a subjective synonym of Plateosaurus'
- 'Zanclodontidae is a subjective synonym of Plateosauridae'