Genus · Dome-headed dinosaurs · Cretaceous
Stegoceras
Named by Lambe 1902
Stegoceras lived 83.6–72.1 million years ago, during the Campanian stage of the Late Cretaceous. The Paleobiology Database lists 46 fossil records for it from 2 countries (United States and Canada) — the 21st most of the 99 genera on this site.
Where it sits in time
Key facts from the records
- Its records are spread over at least 7 formations; the largest share, 33%, is from the Judith River Formation.
- Troodon appears in 9% of the collections that hold Stegoceras; Edmontonia in 7%.
- Its stage range spans about 11.5 million years (36th longest of 99); it is the best-recorded of the 2 dome-headed dinosaurs here.
2 accepted species
| Species | Named by | Records |
|---|---|---|
| Stegoceras validum | Lambe 1902 | 32 |
| Stegoceras novomexicanum | Jasinski and Sullivan 2011 | 5 |
Where it was found
46 records with coordinates.
Found alongside
Rock formations
States & provinces
| Region | Records | Share |
|---|---|---|
| Alberta | 22 | 48% |
| Montana | 16 | 35% |
| New Mexico | 6 | 13% |
| Saskatchewan | 1 | 2% |
| Texas | 1 | 2% |
| Country | Records | Share |
|---|---|---|
| United States | 23 | 50% |
| Canada | 23 | 50% |
Records by stage
Well-dated records, by the stage of their mid-point age.
Depositional settings
Also from these formations
Data: PBDB taxon 38787 · method