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 or via the Support page.
Dinosaur: "Ornithomimus" sedens
| Length*: | 5.8 m | 19.0 ft |
| Weight*: | 420 kg | 926 lb |
| Speed: | 64 km/h | 40 mph |
*The largest known specimen
Period
Epoch: Late Cretaceous
Stage: Late Maastrichtian
Years: 72.1–66 Ma
Details
Status: nomen dubium
Author: Marsh
Year: 1892
Distribution
Area: North America
Country: USA, Canada
Region: Wyoming, Montana, Saskatchewan, Alberta
Formation: Lance, Hell Creek, Frenchman, Scollard
Sources
Material: Two incomplete skeletons and skull. Referred unguals ?, other postcrania ?
References: Marsh, (1892). Notice of new reptiles from the Laramie Formation.Mortimer - Theropod database (online).
