Genus · Troodontidae · Cretaceous
Stenonychosaurus
Named by Sternberg 1932
Stenonychosaurus lived 83.6–66 million years ago, during the Campanian to Maastrichtian stages of the Late Cretaceous. The Paleobiology Database lists 14 fossil records for it from 2 countries (Canada and United States) — the 84th most of the 99 genera on this site.
Where it sits in time
Key facts from the records
- The Dinosaur Park Formation supplies 43% of its records, followed by the Oldman Formation.
- Thescelosaurus appears in 14% of the collections that hold Stenonychosaurus; Triceratops in 7%.
- Its stage range spans about 17.6 million years (15th longest of 99); it is the 26th best-recorded of the 32 theropods here.
1 accepted species
Stenonychosaurus has a single accepted species in PBDB.
| Species | Named by | Records |
|---|---|---|
| Stenonychosaurus inequalis | Sternberg 1932 | 14 |
Where it was found
14 records with coordinates.
Found alongside
Rock formations
States & provinces
| Region | Records | Share |
|---|---|---|
| Alberta | 12 | 86% |
| Wyoming | 1 | 7% |
| Montana | 1 | 7% |
| Country | Records | Share |
|---|---|---|
| Canada | 12 | 86% |
| United States | 2 | 14% |
Records by stage
Well-dated records, by the stage of their mid-point age.
Other theropods of its time
Same group, overlapping stage range, not found in the same collections.
| Genus | Age | Country | Records |
|---|---|---|---|
| Saurornitholestes | 83.6–66 Ma | Canada, United States | 148 |
| Troodon | 83.6–66 Ma | Canada, United States | 103 |
| Tyrannosaurus | 72.1–66 Ma | United States, Canada | 85 |
| Tarbosaurus | 72.1–66 Ma | Mongolia, China | 56 |
| Dromaeosaurus | 83.6–66 Ma | Canada, United States | 48 |
| Albertosaurus | 83.6–66 Ma | Canada, United States | 32 |
| Gallimimus | 72.1–66 Ma | Mongolia, Uzbekistan | 30 |
| Masiakasaurus | 72.1–66 Ma | Madagascar | 29 |
Also from these formations
Data: PBDB taxon 38571 · method