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: Ultrasauros macintoshi
Jurassic: 149.2–145 Ma
| Length*: | 23 m | 75.5 ft |
| Weight*: | 32 t | 70,548 lb |
*The largest known specimen
Period
Epoch: Late Jurassic
Stage: Early Tithonian
Years: 149.2–145 Ma
Details
Status: nomen dubium / S > Brachiosaurus sp.
Author: Olshevsky
Year: 1991
Distribution
Area: North America
Country: USA
Region: Colorado
Formation: Morrison
Sources
Material: Scapulocoracoid.
References: Curtice, Brian D., Kenneth L. Stadtman and Linda J. Curtice. (1996). A reassessment of Ultrasauros macintoshi (Jensen, 1985).
________________________
