Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Soricomorpha Gregory, 1910 see Suborder Soricomorpha Gregory, 1910
       Family Soricidae Fischer, 1814 - shrews
         Subfamily Soricinae Fischer, 1814
           Tribe Soricini Fischer, 1814
             Genus Sorex Linnaeus, 1758 - long-tailed shrews
               Sorex trowbridgii Baird, 1857 - Trowbridge's shrew
                 1 [Sorex trowbridgii trowbridgii]ᵀ Baird, 1857
                 2 Sorex trowbridgii destructioni Scheffer & Dalquest, 1942
                 3 Sorex trowbridgii humboldtensis Jackson, 1922
                 4 Sorex trowbridgii mariposae Grinnell, 1913
                 5 Sorex trowbridgii montereyensis Merriam, 1895