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: Yamanasaurus lojaensis

Length*: | 7.1 m | 23.3 ft |
Weight*: | 1.5 t | 3,307 lb |
*The largest known specimen
Period
Epoch: Late Cretaceous
Stage: Late Maastrichtian
Years: 72.1–66 Ma
Details
Status: valid
Author: Apesteguía et al.
Year: 2019
Distribution
Area: South America
Country: Ecuador
Region: Loja
Formation: Río Playas
Locations
Sources
Material: 2 sacral vertebrae, fragmentary caudal vertebra, fragmentary humerus, fragmentary radius and partial tibia.
References: Apesteguía, S., Soto Luzuriaga, J. E., Gallina, P. A., Granda, J. T., & Guamán Jaramillo, G. A. (2019). The first dinosaur remains from the Cretaceous of Ecuador.