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: Haplocanthosaurus delfsi
| Length*: | 14.5 m | 47.6 ft |
| Weight*: | 13 t | 28,660 lb |
*The largest known specimen
Period
Epoch: Late Jurassic
Stage: Late Kimmeridgian
Years: 154.8–149.2 Ma
Details
Status: valid
Author: McIntosh & Williams
Year: 1988
Distribution
Area: North America
Country: USA
Region: Colorado
Formation: Morrison
Locations
Sources
Material: Partial skeleton (vertebrae, ribs, sacrum, chevrons, partial scapula, fragmentary coracoids, sternal plate, partial radius and ulna, ilia, pubis, ischium, femur).
References: Forster, J.R., Wedel, M.J. (2014). "Haplocanthosaurus (Saurischia: Sauropoda) from the lower Morrison Formation (Upper Jurassic) near Snowmass, Colorado".
