Found in 4 samples

United States: Strathern (LACM 7893) (Middle Eocene), Strathern (LACM 7894) (Middle Eocene), Strathern (LACM 7895) (Middle Eocene), Simi Valley Landfill (2000s collection) (Middle Eocene)

See also Simimys landeri, Simimys simplex