Genus · Dryosauridae · Jurassic
Dryosaurus
Named by Marsh 1894
Dryosaurus lived 154.8–145 million years ago, during the Kimmeridgian to Tithonian stages of the Late Jurassic. The Paleobiology Database lists 24 fossil records for it from 4 countries (United States, France and Portugal and others) — the 52nd most of the 99 genera on this site.
Where it sits in time
Key facts from the records
- Most of what is known comes from one rock unit: 88% of its records are from the Morrison Formation.
- It is one of the more widespread genera here: records from 4 countries, 11th of 99.
- Camarasaurus appears in 65% of the collections that hold Dryosaurus; Allosaurus in 61%.
- Its stage range spans about 9.8 million years (56th longest of 99); it is the 14th best-recorded of the 21 ornithopods here.
2 accepted species
| Species | Named by | Records |
|---|---|---|
| Dryosaurus altus | Marsh 1878 | 7 |
| Dryosaurus elderae | Carpenter and Galton 2018 | 2 |
Where it was found
24 records with coordinates.
Found alongside
Rock formations
States & provinces
| Region | Records | Share |
|---|---|---|
| Utah | 7 | 29% |
| Wyoming | 7 | 29% |
| Colorado | 7 | 29% |
| Normandie | 1 | 4% |
| Centro | 1 | 4% |
| Nordrhein-Westfalen | 1 | 4% |
| Country | Records | Share |
|---|---|---|
| United States | 21 | 88% |
| France | 1 | 4% |
| Portugal | 1 | 4% |
| Germany | 1 | 4% |
Records by stage
Well-dated records, by the stage of their mid-point age.
Depositional settings
Other ornithopods of its time
Same group, overlapping stage range, not found in the same collections.
| Genus | Age | Country | Records |
|---|---|---|---|
| Nanosaurus | 154.8–145 Ma | United States | 32 |
| Gryposaurus | 199.5–72.1 Ma | Canada, United States | 31 |
Also from these formations
Data: PBDB taxon 38731 · method