Uintasorex parvulus was named by Matthew (1909). Its type specimen is AMNH 12052, a mandible (right ramus of the mandible with P4-M1 and the root of the enlarged, rodentlike anterior tooth), and it is a 3D body fossil. Its type locality is Henry's Fork Hill (Bridger D), which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming. It is the type species of Uintasorex.