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: Xenotarsosaurus bonapartei

Length*: | 5.4 m | 17.7 ft |
Weight*: | 430 kg | 948 lb |
*The largest known specimen
Period
Epoch: Late Cretaceous
Stage: Cenomanian
Years: 100.5–93.9 Ma
Details
Status: valid
Author: Martínez et al.
Year: 1986
Distribution
Area: South America
Country: Argentina
Region: Chubut
Formation: Bajo Barreal
Locations
Sources
Material: Femur, tibia, fibula, astragalocalcaneum and 2 dorsal vertebrae.
References: Martínez, R.D., Giménez, O., Rodríguez, J., Bochatey, G. (1986) "Xenotarsosaurus bonapartei nov. gen. et sp. (Carnosauria, Abelisauridae), un nuevo Theropoda de la Formacion Bajo Barreal, Chubut, Argentina".