Genus · Saltasauridae · Cretaceous
Alamosaurus
Named by Gilmore 1922
Alamosaurus lived 72.1–66 million years ago, during the Maastrichtian stage of the Late Cretaceous. The Paleobiology Database lists 38 fossil records for it from 2 countries (United States and Mexico) — the 27th 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, 39%, is from the Ojo Alamo Formation.
- Triceratops appears in 8% of the collections that hold Alamosaurus; Kritosaurus in 3%.
- Its stage range spans about 6.1 million years (83rd longest of 99); it is the 6th best-recorded of the 19 sauropodomorphs here.
1 accepted species
Alamosaurus has a single accepted species in PBDB.
| Species | Named by | Records |
|---|---|---|
| Alamosaurus sanjuanensis | Gilmore 1922 | 31 |
Where it was found
38 records with coordinates.
Found alongside
Rock formations
States & provinces
| Region | Records | Share |
|---|---|---|
| New Mexico | 22 | 58% |
| Texas | 11 | 29% |
| Utah | 4 | 11% |
| Chihuahua | 1 | 3% |
| Country | Records | Share |
|---|---|---|
| United States | 37 | 97% |
| Mexico | 1 | 3% |
Records by stage
Well-dated records, by the stage of their mid-point age.
Depositional settings
Other sauropodomorphs of its time
Same group, overlapping stage range, not found in the same collections.
| Genus | Age | Country | Records |
|---|---|---|---|
| Neuquensaurus | 86.3–66 Ma | Argentina, Uruguay | 15 |
Also from these formations
Data: PBDB taxon 38683 · method