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
               Subgenus Sorex Linnaeus, 1758
                 Sorex caecutiens group
                   1 Sorex caecutiens Laxmann, 1788 - Laxmann's shrew
                   2 Sorex isodon Turov, 1924
                   3 Sorex minutissimus Zimmermann, 1780 - least shrew
                   4 Sorex roboratus Hollister, 1913 - flat-skulled shrew
                   5 Sorex shinto Thomas, 1905
                   6 Sorex unguiculatus Dobson, 1890 - long-clawed shrew