Opinions from P. Dodson et al. 2004
- 'Achelousaurus belongs to Centrosaurinae'
- 'Achelousaurus horneri belongs to Achelousaurus'
- 'Agathaumas is a nomen dubium'
- 'Agathaumas sylvestris is a nomen dubium'
- 'Anchiceratops belongs to Chasmosaurinae'
- 'Anchiceratops longirostris is a subjective synonym of Anchiceratops ornatus'
- 'Anchiceratops ornatus belongs to Anchiceratops'
- 'Arrhinoceratops belongs to Chasmosaurinae'
- 'Arrhinoceratops brachyops belongs to Arrhinoceratops'
- 'Arrhinoceratops utahensis is a subjective synonym of Torosaurus latus'
- 'Avaceratops belongs to Centrosaurinae'
- 'Avaceratops lammersi belongs to Avaceratops'
- 'Bison alticornis is a nomen dubium'
- 'Brachyceratops belongs to Centrosaurinae'
- 'Brachyceratops montanensis belongs to Brachyceratops'
- 'Centrosaurinae belongs to Ceratopsidae'
- 'Centrosaurus belongs to Centrosaurinae'
- 'Centrosaurus apertus belongs to Centrosaurus'
- 'Centrosaurus longirostris is a subjective synonym of Centrosaurus apertus'
- 'Ceratops is a nomen dubium'
- 'Ceratops horridus is recombined as Triceratops horridus'
- 'Ceratops montanus is a nomen dubium'
- 'Chasmosaurinae belongs to Ceratopsidae'
- 'Chasmosaurus belongs to Chasmosaurinae'
- 'Chasmosaurus brevirostris is a subjective synonym of Chasmosaurus belli'
- 'Chasmosaurus irvinensis belongs to Chasmosaurus'
- 'Chasmosaurus kaiseni is a subjective synonym of Chasmosaurus belli'
- 'Chasmosaurus mariscalensis belongs to Chasmosaurus'
- 'Chasmosaurus russelli belongs to Chasmosaurus'
- 'Diceratops belongs to Chasmosaurinae'
- 'Diceratops hatcheri belongs to Diceratops'
- 'Dysganus bicarinatus is a nomen dubium'
- 'Dysganus encaustus is a nomen dubium'
- 'Dysganus haydenianus is a nomen dubium'
- 'Dysganus peiganus is a nomen dubium'
- 'Einiosaurus belongs to Centrosaurinae'
- 'Einiosaurus procurvicornis belongs to Einiosaurus'
- 'Eoceratops is a subjective synonym of Chasmosaurus'
- 'Monoclonius belongs to Centrosaurinae'
- 'Monoclonius belli is recombined as Chasmosaurus belli'
- 'Chasmosaurus canadensis is a subjective synonym of Chasmosaurus belli'
- 'Monoclonius crassus belongs to Monoclonius'
- 'Monoclonius cutleri is a subjective synonym of Centrosaurus apertus'
- 'Monoclonius dawsoni is a subjective synonym of Centrosaurus apertus'
- 'Monoclonius fissus is a nomen dubium'
- 'Monoclonius flexus is a subjective synonym of Centrosaurus apertus'
- 'Monoclonius lowei is a subjective synonym of Monoclonius crassus'
- 'Monoclonius nasicornus is a subjective synonym of Styracosaurus albertensis'
- 'Monoclonius recurvicornis is a nomen dubium'
- 'Monoclonius sphenocerus is a nomen dubium'
- 'Notoceratops is a nomen dubium'
- 'Notoceratops bonarelli is a nomen dubium'
- 'Pachyrhinosaurus belongs to Centrosaurinae'
- 'Pachyrhinosaurus canadensis belongs to Pachyrhinosaurus'
- 'Pentaceratops belongs to Chasmosaurinae'
- 'Pentaceratops fenestratus is a subjective synonym of Pentaceratops sternbergii'
- 'Pentaceratops sternbergii belongs to Pentaceratops'
- 'Polyonax is a nomen dubium'
- 'Polyonax mortuarius is a nomen dubium'
- 'Protorosaurus is a subjective synonym of Chasmosaurus'
- 'Styracosaurus belongs to Centrosaurinae'
- 'Styracosaurus albertensis belongs to Styracosaurus'
- 'Styracosaurus ovatus is a nomen dubium'
- 'Styracosaurus parksi is a subjective synonym of Styracosaurus albertensis'
- 'Torosaurus belongs to Chasmosaurinae'
- 'Torosaurus gladius is a subjective synonym of Torosaurus latus'
- 'Torosaurus latus belongs to Torosaurus'
- 'Triceratops belongs to Chasmosaurinae'
- 'Triceratops albertensis is a subjective synonym of Triceratops horridus'
- 'Triceratops brevicornus is a subjective synonym of Triceratops horridus'
- 'Triceratops calicornis is a subjective synonym of Triceratops horridus'
- 'Triceratops elatus is a subjective synonym of Triceratops horridus'
- 'Triceratops eurycephalus is a subjective synonym of Triceratops horridus'
- 'Triceratops flabellatus is a subjective synonym of Triceratops horridus'
- 'Triceratops galeus is a nomen dubium'
- 'Triceratops ingens is a nomen dubium'
- 'Triceratops maximus is a nomen dubium'
- 'Triceratops obtusus is a subjective synonym of Triceratops horridus'
- 'Triceratops prorsus is a subjective synonym of Triceratops horridus'
- 'Triceratops serratus is a subjective synonym of Triceratops horridus'
- 'Triceratops sulcatus is a nomen dubium'
- 'Ugrosaurus is a nomen dubium'
- 'Ugrosaurus olsoni is a nomen dubium'