Species: pattersoni FOX, 1980
Etymology:
Holotype: UA 15100
Locality: UA-MR-6, exposed in Verdigris Coulee, about 19km (18 miles) east of the Village of Milk River, Warner County, Alberta Province, Canada.
Horizon: Upper Milk River Formation.
Biostratigraphy:
Age: Aquilian age, Lower Campanian Stage, Aquilian in age, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material: Upper left M2.
Referred material:
UA 15101: The trigonid of a right lower M2.