Latitudinal range: 41.5° to 44.9°

Found in 5 samples

United States: UMMP SC-4 (Early Eocene), UMMP SC-54 (Early Eocene), UMMP SC-67 (Early Eocene), Big Multi Quarry (Late Palaeocene), Y2K Quarry (Late Palaeocene)

See also Arctodontomys simplicidens, Arctodontomys sp., Arctodontomys wilsoni