Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Soricomorpha Gregory, 1910 see Suborder Soricomorpha Gregory, 1910
       Family Talpidae Batsch, 1788 - moles, shrew moles and desmans
         Subfamily Scalopinae Gill, 1875
           Tribe Scalopini Gill, 1875
             Genus Scapanus Pomel, 1848 - western American moles
               Scapanus townsendii (Bachman, 1839) - Townsend mole
                 Scapanus townsendii olympicus Johnson & Yates, 1980