Opinions from W. D. Matthew 1915
- 'Anchiceratops belongs to Ceratopsidae'
- 'Anchisauridae belongs to Pachypodosauria'
- 'Ankylosauridae belongs to Stegosauria'
- 'Camptosauridae belongs to Ornithopoda'
- 'Camptosaurus belongs to Iguanodontidae'
- 'Ceratops belongs to Ceratopsidae'
- 'Ceratopsia belongs to Ornithischia'
- 'Ceratopsidae belongs to Ceratopsia'
- 'Cetiosauria is a subjective synonym of Sauropoda'
- 'Cetiosauridae belongs to Sauropoda'
- 'Claosaurus belongs to Trachodontidae'
- 'Coeluridae belongs to Coelurosauria'
- 'Coelurosauria belongs to Saurischia'
- 'Compsognatha is a subjective synonym of Coelurosauria'
- 'Compsognathidae belongs to Coelurosauria'
- 'Corythosaurus belongs to Trachodontidae'
- 'Dinodontidae is corrected as Deinodontidae and belongs to Theropoda'
- 'Diplodocidae belongs to Sauropoda'
- 'Goniopoda is a subjective synonym of Theropoda'
- 'Gryposaurus is a subjective synonym of Kritosaurus'
- 'Hadrosauridae is a subjective synonym of Trachodontidae'
- 'Hadrosaurus belongs to Trachodontidae'
- 'Hallopidae is corrected as Hallopodidae and belongs to Coelurosauria'
- 'Iguanodon belongs to Iguanodontidae'
- 'Iguanodontia is a subjective synonym of Ornithopoda'
- 'Iguanodontidae belongs to Ornithopoda'
- 'Laelaps is a subjective synonym of Dryptosaurus'
- 'Megalosauri is corrected as Megalosauridae and belongs to Theropoda'
- 'Monoclonius belongs to Ceratopsidae'
- 'Morosauridae belongs to Sauropoda'
- 'Morosaurus is a subjective synonym of Camarasaurus'
- 'Nanosauridae belongs to Ornithopoda'
- 'Nodosauridae is a subjective synonym of Ankylosauridae'
- 'Opisthocoelia is a subjective synonym of Sauropoda'
- 'Ornithomimidae belongs to Theropoda'
- 'Ornithopoda belongs to Ornithischia'
- 'Orthopoda is a subjective synonym of Ornithischia'
- 'Pachypodosauria belongs to Saurischia'
- 'Plateosauridae belongs to Pachypodosauria'
- 'Podokesauridae belongs to Coelurosauria'
- 'Predentata is a subjective synonym of Ornithischia'
- 'Saurolophus belongs to Trachodontidae'
- 'Sauropoda was reranked as a suborder and belongs to Saurischia'
- 'Scelidosauridae belongs to Stegosauria'
- 'Stegosauria belongs to Ornithischia'
- 'Stegosauridae belongs to Stegosauria'
- 'Styracosaurus belongs to Ceratopsidae'
- 'Symphypoda is a subjective synonym of Coelurosauria'
- 'Telmatosaurus belongs to Trachodontidae'
- 'Theropoda was reranked as a suborder and belongs to Saurischia'
- 'Thescelosaurus belongs to Iguanodontidae'
- 'Torosaurus belongs to Ceratopsidae'
- 'Trachodon belongs to Trachodontidae'
- 'Trachodontidae belongs to Ornithopoda'
- 'Triceratops belongs to Ceratopsidae'
- 'Zanclodontidae belongs to Pachypodosauria'