Every month, 100,000 readers use the Dinosaur Database, but we receive no support from you. Developing and updating the database requires a lot of work. Therefore, as of September 1, 2025, the database will be closed. If you want it to remain open and be updated, please support us via the "Buy us a coffee" button available on every page.
Dinosaur: Arrhinoceratops brachyops

Length*: | 4.2 m | 13.8 ft |
Weight*: | 800 kg | 1,764 lb |
*The largest known specimen
Period
Epoch: Late Cretaceous
Stage: Early Maastrichtian
Years: 72.1–66 Ma
Details
Status: valid
Author: Parks
Year: 1925
Distribution
Area: North America
Country: Canada
Region: Alberta
Formation: Horseshoe Canyon
Locations
Sources
Material: Almost complete skull, referred at least 3 specimens (include skulls and fragmentary skeleton).
References: Mallon JC, Ryan MJ, Campbell JA. (2015) Skull ontogeny in Arrhinoceratops brachyops (Ornithischia: Ceratopsidae) and other horned dinosaurs.