Reptilia - Neornithischia - Ceratopsidae
PaleoDB taxon number: 38862
Invalid subtaxa: Diceratops Hatcher and Lull 1905 [replaced name] (no. 63889), Diceratus Mateus 2008 (no. 119492), Nedoceratops Ukrainsky 2007 (no. 139255), Ojoceratops Sullivan and Lucas 2010 (no. 170629), Sterrholophus Marsh 1891 (no. 52928), Tatankaceratops Ott and Larson 2010 (no. 170637)
Full reference: O. C. Marsh. 1889. Notice of gigantic horned Dinosauria from the Cretaceous. American Journal of Science 38:173-175
Parent taxon: Triceratopsini according to N. R. Longrich 2014
Sister taxa: Eotriceratops, Regaliceratops, Titanoceratops, Torosaurus
Subtaxa: Ojoceratops fowleri, Tatankaceratops sacrisonorum, Triceratops horridus, Triceratops prorsus, Triceratops sulcatus
Type: Ceratops horridus
Ecology: ground dwelling herbivore