ammonites
Catopsalis joyneri Sloan and Van Valen 1965 (mammal)

Mammalia - Allotheria - Taeniolabididae

Full reference: R. E. Sloan and L. Van Valen. 1965. Cretaceous mammals from Montana. Science 148(3667):220-227

Belongs to Catopsalis according to Z. Kielan-Jaworowska and R. E. Sloan 1979

Sister taxa: Catopsalis alexanderi, Catopsalis calgariensis, Catopsalis fissidens, Catopsalis foliatus, Catopsalis waddleae

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