CentrosaurinaeCerapodaCeratopsiaCeratopsidaeCeratopsoideaCoronosauriaDinosauriaEucentrosauraGenasauriaLate CretaceousMarginocephaliaNeoceratopsiaNeornithischiaNorth AmericaOrnithischiaPachyrhinosauriniPachyrostra

Achelousaurus horneri

Dinosaur: Achelousaurus horneri

Cretaceous: 83.6–72.1 Ma
Type: Ceratops

Length*:6 m19.7 ft
Weight*:2.6 tons5,732 lb
ESR: 2.5 / 4 (estimated size reliability)
*The largest known specimen



Sources

Material: At least 4 individuals (skulls and also postcranial fragments).
References: Sampson, S. D. (1995). "Two new horned dinosaurs from the upper Cretaceous Two Medicine Formation of Montana; with a phylogenetic analysis of the Centrosaurinae (Ornithischia: Ceratopsidae)"

Locations

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