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: Astrodon johnstoni
| Length*: | 21.7 m | 71.2 ft |
| Weight*: | 23 t | 50,706 lb |
*The largest known specimen
Period
Epoch: Early Cretaceous
Stage: Late Aptian-Early Albian
Years: 121.4–100.5 Ma
Details
Status: nomen dubium
Author: Leidy
Year: 1865
Distribution
Area: North America
Country: USA
Region: Maryland
Formation: Arundel
Sources
Material: Two teeth and many other referred bones (also Pleurocoelus altus and P. nanus material).
References: D’Emic, M. D. (2013). Revision of the sauropod dinosaurs of the Lower Cretaceous Trinity Group, southern USA, with the description of a new genus.
