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. If you want it to remain open and be updated, please support us via the "Buy us a coffee" button available on every page or via the Support page.
Dinosaur: Achelousaurus horneri
| Length*: | 6 m | 19.7 ft |
| Weight*: | 2.6 t | 5,732 lb |
*The largest known specimen
Period
Epoch: Late Cretaceous
Stage: Late Campanian
Years: 83.6–72.1 Ma
Details
Status: valid
Author: Sampson
Year: 1995
Distribution
Area: North America
Country: USA
Region: Montana
Formation: Two Medicine
Locations
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)"
