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: Mierasaurus bobyoungi

Length*: | 11.5 m | 37.7 ft |
Weight*: | 4.8 t | 10,582 lb |
*The largest known specimen
Period
Epoch: Early Cretaceous
Stage: Valanginian
Years: 139.8–132.6 Ma
Details
Status: valid
Author: Royo-Torres et al.
Year: 2017
Distribution
Area: North America
Country: USA
Region: Utah
Formation: Cedar Mountain
Locations
Sources
Material: Large part of skeleton with incomplete skull. Referred dentary, femur, other material ?
References: Royo-Torres, R., Upchurch, P., Kirkland, J.I., DeBlieux, D.D., Foster, J.R., Cobos, A. & Alcalá, L. (2017) "Descendants of the Jurassic turiasaurs from Iberia found refuge in the Early Cretaceous of western USA".