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. Therefore, as of September 1, 2025, the database will be closed. If you want it to remain open and be updated, please support us via the "Buy us a coffee" button available on every page.
Dinosaur: Allosaurus ferox
| Length*: | 4.9 m | 16.1 ft |
| Weight*: | 300 kg | 661 lb |
*The largest known specimen
Period
Epoch: Late Jurassic
Stage: Tithonian
Years: 149.2–145 Ma
Details
Status: nomen dubium
Author: Marsh
Year: 1896
Distribution
Area: North America
Country: USA
Region: Wyoming
Formation: Morrison
Sources
Material: Partial skull, dentaries, surangular fragment, dorsal central fragment, dorsal rib fragments, scapular fragment ?, incomplete pedal ungual.
References: Marsh, (1896). The dinosaurs of North America. United States Geological Survey.
