Opinions from L. S. Russell 1930
- 'Agathaumas belongs to Ceratopsidae'
- 'Agathaumas sylvestris belongs to Agathaumas'
- 'Alamosaurus belongs to Atlantosauridae'
- 'Alamosaurus sanjuanensis belongs to Alamosaurus'
- 'Albertosaurus belongs to Deinodontidae'
- 'Albertosaurus arctunguis belongs to Albertosaurus'
- 'Albertosaurus sarcophagus belongs to Albertosaurus'
- 'Anchiceratops belongs to Ceratopsidae'
- 'Anchiceratops longirostris belongs to Anchiceratops'
- 'Anchiceratops ornatus belongs to Anchiceratops'
- 'Ankylosaurus belongs to Nodosauridae'
- 'Ankylosaurus magniventris belongs to Ankylosaurus'
- 'Anodontosaurus belongs to Nodosauridae'
- 'Anodontosaurus lambei belongs to Anodontosaurus'
- 'Arrhinoceratops belongs to Ceratopsidae'
- 'Arrhinoceratops brachyops belongs to Arrhinoceratops'
- 'Atlantosauridae belongs to Sauropoda'
- 'Brachyceratops belongs to Ceratopsidae'
- 'Brachyceratops montanensis belongs to Brachyceratops'
- 'Centrosaurus belongs to Ceratopsidae'
- 'Centrosaurus apertus belongs to Centrosaurus' according to L. M. Lambe 1904
- 'Centrosaurus apertus belongs to Centrosaurus'
- 'Ceratops horridus is recombined as Triceratops horridus'
- 'Ceratops montanus belongs to Ceratops'
- 'Ceratopsidae belongs to Ceratopsia'
- 'Chasmosaurus belongs to Ceratopsidae'
- 'Cheneosaurus belongs to Hadrosauridae'
- 'Cheneosaurus tolmanensis belongs to Cheneosaurus'
- 'Chirostenotes belongs to Coeluridae'
- 'Chirostenotes pergracilis belongs to Chirostenotes'
- 'Claosaurus belongs to Hadrosauridae'
- 'Coelosaurus belongs to Ornithomimidae'
- 'Coelosaurus antiquus belongs to Coelosaurus'
- 'Corythosaurus belongs to Hadrosauridae'
- 'Corythosaurus casuarius belongs to Corythosaurus'
- 'Corythosaurus excavatus belongs to Corythosaurus'
- 'Deinodon belongs to Deinodontidae'
- 'Deinodon horridus belongs to Deinodon'
- 'Diceratops belongs to Ceratopsidae'
- 'Diceratops hatcheri belongs to Diceratops'
- 'Didanodon belongs to Hadrosauridae'
- 'Didanodon altidens belongs to Didanodon'
- 'Didanodon altidens belongs to Didanodon' according to H. F. Osborn 1902
- 'Dinodontidae belongs to Theropoda'
- 'Dromaeosaurus belongs to Deinodontidae'
- 'Dromaeosaurus albertensis belongs to Dromaeosaurus'
- 'Dryptosaurus belongs to Dinodontidae'
- 'Dyoplosaurus belongs to Nodosauridae'
- 'Dyoplosaurus acutosquameus belongs to Dyoplosaurus'
- 'Edmontonia belongs to Nodosauridae'
- 'Edmontonia longiceps belongs to Edmontonia'
- 'Edmontosaurus belongs to Hadrosauridae'
- 'Edmontosaurus regalis belongs to Edmontosaurus'
- 'Eoceratops belongs to Ceratopsidae'
- 'Euoplocephalus belongs to Nodosauridae'
- 'Gorgosaurus belongs to Deinodontidae'
- 'Gorgosaurus libratus belongs to Gorgosaurus'
- 'Gorgosaurus sternbergi belongs to Gorgosaurus' according to W. A. Matthew and B. Brown 1922
- 'Gorgosaurus sternbergi belongs to Gorgosaurus'
- 'Gryposaurus notabilis is recombined as Kritosaurus notabilis'
- 'Hadrosauridae belongs to Ornithopoda'
- 'Hadrosaurus belongs to Hadrosauridae'
- 'Hadrosaurus agilis is recombined as Claosaurus agilis'
- 'Hadrosaurus cavatus belongs to Hadrosaurus' according to E. D. Cope 1871
- 'Hadrosaurus cavatus belongs to Hadrosaurus'
- 'Hadrosaurus foulkii belongs to Hadrosaurus'
- 'Hadrosaurus minor belongs to Hadrosaurus'
- 'Hierosaurus belongs to Nodosauridae'
- 'Hierosaurus sternbergii belongs to Hierosaurus'
- 'Hypacrosaurus belongs to Hadrosauridae'
- 'Hypacrosaurus altispinus belongs to Hypacrosaurus'
- 'Hypsilophodontidae belongs to Ornithopoda'
- 'Kritosaurus belongs to Hadrosauridae'
- 'Kritosaurus incurvimanus belongs to Kritosaurus'
- 'Kritosaurus navajovius belongs to Kritosaurus'
- 'Laelaps aquilunguis is recombined as Dryptosaurus aquilunguis'
- 'Laelaps laevifrons is recombined as Dromaeosaurus laevifrons' according to W. D. Matthew and B. Brown 1922
- 'Laelaps laevifrons is recombined as Dromaeosaurus laevifrons'
- 'Lambeosaurus belongs to Hadrosauridae'
- 'Lambeosaurus lambei belongs to Lambeosaurus'
- 'Leptoceratops belongs to Ceratopsidae'
- 'Leptoceratops gracilis belongs to Leptoceratops'
- 'Monoclonius belongs to Ceratopsidae'
- 'Monoclonius canadensis is recombined as Eoceratops canadensis'
- 'Monoclonius crassus belongs to Monoclonius'
- 'Monoclonius cutleri belongs to Monoclonius'
- 'Monoclonius cutleri is recombined as Centrosaurus cutleri'
- 'Monoclonius dawsoni is recombined as Brachyceratops dawsoni'
- 'Monoclonius nasicornus is recombined as Centrosaurus nasicornus'
- 'Monoclonius recurvicornis is recombined as Ceratops recurvicornis' according to J. B. Hatcher 1905
- 'Monoclonius recurvicornis is recombined as Ceratops recurvicornis'
- 'Monoclonius sphenocerus belongs to Monoclonius'
- 'Nodosauridae belongs to Stegosauria'
- 'Nodosaurus belongs to Nodosauridae'
- 'Nodosaurus textilis belongs to Nodosaurus'
- 'Ornithomimidae belongs to Theropoda'
- 'Ornithomimipus belongs to Ornithomimidae'
- 'Ornithomimipus angustus belongs to Ornithomimipus'
- 'Ornithomimus belongs to Ornithomimidae'
- 'Ornithomimus altus belongs to Ornithomimus'
- 'Ornithomimus sedens belongs to Ornithomimus'
- 'Ornithomimus tenuis belongs to Ornithomimus'
- 'Ornithomimus velox belongs to Ornithomimus'
- 'Ornithotarsus belongs to Hadrosauridae'
- 'Ornithotarsus immanis belongs to Ornithotarsus'
- 'Palaeoscincus belongs to Nodosauridae'
- 'Palaeoscincus asper belongs to Palaeoscincus'
- 'Palaeoscincus costatus belongs to Palaeoscincus'
- 'Palaeoscincus latus belongs to Palaeoscincus'
- 'Panoplosaurus belongs to Nodosauridae'
- 'Panoplosaurus mirus belongs to Panoplosaurus'
- 'Parasaurolophus belongs to Hadrosauridae'
- 'Parasaurolophus walkeri belongs to Parasaurolophus'
- 'Pentaceratops belongs to Ceratopsidae'
- 'Pentaceratops sternbergii belongs to Pentaceratops'
- 'Pneumatoarthrus belongs to Hadrosauridae'
- 'Pneumatoarthrus peloreus belongs to Pneumatoarthrus'
- 'Prosaurolophus belongs to Hadrosauridae'
- 'Prosaurolophus maximus belongs to Prosaurolophus'
- 'Saurolophus belongs to Hadrosauridae'
- 'Saurolophus osborni belongs to Saurolophus'
- 'Stegoceras validus is recombined as Troodon validus'
- 'Stegopelta belongs to Nodosauridae'
- 'Stegopelta landerensis belongs to Stegopelta'
- 'Stephanosaurus is a subjective synonym of Kritosaurus'
- 'Stephanosaurus intermedius is recombined as Corythosaurus intermedius'
- 'Stereocephalus tutus is recombined as Euoplocephalus tutus'
- 'Struthiomimus brevetertius is recombined as Ornithomimus brevitertius'
- 'Struthiomimus samueli is recombined as Ornithomimus samueli'
- 'Styracosaurus belongs to Ceratopsidae'
- 'Styracosaurus albertensis belongs to Styracosaurus'
- 'Thescelosaurus belongs to Hypsilophodontidae'
- 'Thescelosaurus neglectus belongs to Thescelosaurus'
- 'Thescelosaurus warreni belongs to Thescelosaurus'
- 'Thespesius belongs to Hadrosauridae'
- 'Thespesius edmontoni belongs to Thespesius'
- 'Thespesius saskatchewanensis belongs to Thespesius'
- 'Torosaurus gladius belongs to Torosaurus'
- 'Torosaurus latus belongs to Torosaurus'
- 'Trachodon belongs to Hadrosauridae'
- 'Trachodon (Pteropelyx) marginatus is recombined as Kritosaurus marginatus'
- 'Trachodon (Pteropelyx) selwyni belongs to Trachodon (Pteropelyx)' according to L. M. Lambe 1902
- 'Trachodon (Pteropelyx) selwyni is recombined as Corythosaurus selwyni'
- 'Triceratops belongs to Ceratopsidae'
- 'Triceratops brevicornus belongs to Triceratops'
- 'Triceratops calicornis belongs to Triceratops'
- 'Triceratops elatus belongs to Triceratops'
- 'Triceratops flabellatus belongs to Triceratops'
- 'Triceratops obtusus belongs to Triceratops'
- 'Triceratops prorsus belongs to Triceratops'
- 'Triceratops serratus belongs to Triceratops'
- 'Triceratops sulcatus belongs to Triceratops'
- 'Troodon belongs to Troodontidae'
- 'Troodon formosus belongs to Troodon'
- 'Troodontidae belongs to Ornithopoda'
- 'Tyrannosaurus belongs to Deinodontidae'
- 'Tyrannosaurus rex belongs to Tyrannosaurus'