Opinions from M. J. Ryan and D. C. Evans 2005
- 'Ankylosauridae belongs to Ankylosauria'
- 'Anodontosaurus is a subjective synonym of Euoplocephalus'
- 'Anodontosaurus lambei is a subjective synonym of Euoplocephalus tutus'
- 'Brachylophosaurus belongs to Hadrosaurinae'
- 'Brachylophosaurus canadensis belongs to Brachylophosaurus'
- 'Centrosaurinae belongs to Ceratopsidae'
- 'Centrosaurus belongs to Centrosaurinae'
- 'Centrosaurus apertus belongs to Centrosaurus'
- 'Centrosaurus longirostris is a subjective synonym of Centrosaurus apertus'
- 'Ceratopsidae belongs to Neoceratopsia'
- 'Chasmosaurinae belongs to Ceratopsidae'
- 'Chasmosaurus belongs to Chasmosaurinae'
- 'Chasmosaurus brevirostris is a subjective synonym of Chasmosaurus belli'
- 'Chasmosaurus irvinensis belongs to Chasmosaurus'
- 'Chasmosaurus russelli belongs to Chasmosaurus'
- 'Corythosaurus belongs to Lambeosaurinae'
- 'Corythosaurus bicristatus is a subjective synonym of Corythosaurus casuarius'
- 'Corythosaurus brevicristatus is a subjective synonym of Corythosaurus casuarius'
- 'Corythosaurus casuarius belongs to Corythosaurus'
- 'Corythosaurus excavatus is a subjective synonym of Corythosaurus casuarius'
- 'Corythosaurus frontalis is a subjective synonym of Lambeosaurus lambei'
- 'Dyoplosaurus is a subjective synonym of Euoplocephalus'
- 'Dyoplosaurus acutosquameus is a subjective synonym of Euoplocephalus tutus'
- 'Edmontonia belongs to Nodosauridae'
- 'Chassternbergia is a subjective synonym of Edmontonia'
- 'Euoplocephalus belongs to Ankylosauridae'
- 'Gryposaurus belongs to Hadrosaurinae'
- 'Gryposaurus notabilis belongs to Gryposaurus'
- 'Hadrosaurinae belongs to Hadrosauridae'
- 'Hansuessia is a subjective synonym of Stegoceras'
- 'Kritosaurus incurvimanus is recombined as Gryposaurus incurvimanus'
- 'Lambeosaurinae belongs to Hadrosauridae'
- 'Lambeosaurus belongs to Lambeosaurinae'
- 'Lambeosaurus clavinitialis is a subjective synonym of Lambeosaurus lambei'
- 'Lambeosaurus lambei belongs to Lambeosaurus'
- 'Lambeosaurus magnicristatum is corrected as Lambeosaurus magnicristatus and belongs to Lambeosaurus'
- 'Leptoceratops belongs to Neoceratopsia'
- 'Leptoceratops gracilis belongs to Leptoceratops'
- 'Monoclonius belli is recombined as Chasmosaurus belli'
- 'Monoclonius cutleri is a subjective synonym of Centrosaurus apertus'
- 'Monoclonius dawsoni is a subjective synonym of Centrosaurus apertus'
- 'Monoclonius flexus is a subjective synonym of Centrosaurus apertus'
- 'Centrosaurus nasicornus is a subjective synonym of Centrosaurus apertus'
- 'Nodosauridae belongs to Ankylosauria'
- 'Ornatotholus is a subjective synonym of Stegoceras'
- 'Palaeoscincus asper is a subjective synonym of Euoplocephalus tutus'
- 'Palaeoscincus rugosidens is recombined as Edmontonia rugosidens'
- 'Panoplosaurus belongs to Nodosauridae'
- 'Panoplosaurus mirus belongs to Panoplosaurus'
- 'Parasaurolophus belongs to Lambeosaurinae'
- 'Parasaurolophus walkeri belongs to Parasaurolophus'
- 'Parksosaurus belongs to Hypsilophodontidae'
- 'Prosaurolophus belongs to Hadrosaurinae'
- 'Prosaurolophus maximus belongs to Prosaurolophus'
- 'Scolosaurus is a subjective synonym of Euoplocephalus'
- 'Scolosaurus cutleri is a subjective synonym of Euoplocephalus tutus'
- 'Stegoceras belongs to Pachycephalosauridae'
- 'Stegoceras brevis is corrected as Stegoceras breve and belongs to Stegoceras'
- 'Ornatotholus browni is a subjective synonym of Stegoceras validum'
- 'Stegoceras validus is corrected as Stegoceras validum and belongs to Stegoceras'
- 'Corythosaurus intermedius is a subjective synonym of Corythosaurus casuarius'
- 'Stereocephalus tutus is recombined as Euoplocephalus tutus'
- 'Styracosaurus belongs to Centrosaurinae'
- 'Styracosaurus albertensis belongs to Styracosaurus'
- 'Styracosaurus parksi is a subjective synonym of Styracosaurus albertensis'
- 'Tetragonosaurus cranibrevis is a subjective synonym of Lambeosaurus lambei'
- 'Tetragonosaurus erectofrons is a subjective synonym of Corythosaurus casuarius'
- 'Tetragonosaurus praeceps is a subjective synonym of Lambeosaurus lambei'
- 'Thescelosaurus belongs to Hypsilophodontidae'
- 'Thescelosaurus neglectus belongs to Thescelosaurus'
- 'Thescelosaurus warreni is recombined as Parksosaurus warreni'
- 'Troodon sternbergi is recombined as Stegoceras sternbergi'