Holotype:

Locality: West side of the San Rafael Swell, south of Mussentuchit Wash, SW ¼, NW ¼, SE ¼, Sec. 4, T25S, R6E on the Willow Springs, Utah.

Horizon: Mussentuchit Member, Uppermost Cedar Mountain Formation.

Biostratigraphy:

Age: Mussentuchitan age, Uppermost Albian-Lowermost Cenomanian Stage, Upper Gallic subepoch, Lowest Gulf Epoch, Late Early to Early Middle Cretaceous.

Material:
Note: Large species.