Latitudinal range: 34.3° to 40.4°

Found in two samples

United States: Simi Valley Landfill (2000s collection) (Middle Eocene), Dry Gulch Creek Member (SDSNH Locality 5939) (Middle Eocene)

See also Metanoiamys, Metanoiamys lacus, Metanoiamys sp., Metanoiamys texensis