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: Koparion douglassi
| Length*: | 1.05 m | 3.4 ft |
| Weight*: | 2.4 kg | 5 lb |
*The largest known specimen
Period
Epoch: Late Jurassic
Stage: Early Tithonian
Years: 149.2–145 Ma
Details
Status: nomen dubium
Author: Chure
Year: 1994
Distribution
Area: North America
Country: USA
Region: Utah
Formation: Morrison
Sources
Material: Maxillary tooth.
References: Chure, (1994). Koparion douglassi, a new dinosaur from the Morrison Formation (Upper Jurassic) of Dinosaur National Monument; The oldest troodontid (Theropoda: Maniraptora).
