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 Notiosoricini Reumer, 1984
             Genus Notiosorex Baird, 1877 - gray shrews
               1 Notiosorex cockrumi Baker, O'Neill & McAliley, 2003
               2 Notiosorex crawfordi (Coues, 1877) - desert shrew
               3 Notiosorex evotis (Coues, 1877)
               4 Notiosorex villai Carraway & Timm, 2000