Species: simplex GAO & FOX, 1991
Etymology:

Holotype: UALVP 29742

Locality: Near Irvine, in S31, Tp11, R2, W4, About 40 km east of Medicine Hat, Cypress County, Southeastern Alberta Province, Canada.

Horizon: Judith River Formation.

Biostratigraphy:

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

Material: A fragmentary left mandible having splenial firmly articulated with the dentary, and having eight posterior teeth and the base of the last tooth.

Referred material:

GAO & FOX, 1996

Locality: Dinosaur Provincial Park, near Steveville, South Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

NMC 13563: A tooth-bearing right mandibular ramus.

 

Locality: UALVP MR-6, Verdigris Coulee, approximately 30 km east of the Village of Milk River, Warner County, Southern Alberta Province, Canada.

Horizon: Deadhorse Coulee Member, Milk River Formation.

Biostratigraphy:

Age: Aquilian age, Late Santonian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material:

UALVP 29836-29837: Fragmentary tooth-bearing dentaries.