Full reference: R. E. Sloan and L. Van Valen. 1965. Cretaceous mammals from Montana. Science 148(3667):220-227
Type specimen: U.M.V.P. 1494, a maxilla (right maxilla with complete palate, M1, roots of P4, and alveoli of P3 and M2). Its type locality is Bug Creek Anthills, which is in a Puercan terrestrial horizon in the Hell Creek Formation of Montana.
Ecology: scansorial herbivore