Mammalia - Rodentia - Cricetidae

Alternative combination: Copemys vasquezi

Full reference: L. L. Jacobs. 1977. Rodents of the Hemphillian age Redington local fauna, San Pedro Valley, Arizona. Journal of Paleontology 51(3):505-519

Belongs to Antecalomys according to W. W. Korth 1998

Sister taxa: Antecalomys phthanus, Antecalomys valensis

Ecology: ground dwelling herbivore

Average measurements (in mm): m1 1.34 x 0.94

Estimated body mass: 10.7 g based on m1 length