Species: montanensis GAO & FOX, 1996
Etymology: In reference to the state of Montana
Referred material:
Locality: White River Coulee, Southeastern Alberta, Canada.
Horizon: Oldman Formation, middle Judith River Group.
Biostratigraphy:
Age: Judithian age, Middle Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material:
RTMP 78.18.1: A fragmentary frontal with thick fused osteoderms.