Holotype: USNM 11892

Locality: South side of Milk River, NW 1/4, Sec. 27, T37N, R8W, on the Blackfeet Indian Reservation, Glacier County, Montana.

Horizon: Two Medicine Formation.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material: Top of skull and teeth.