Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Chiroptera Blumenbach, 1779 - bats
       Family Vespertilionidae Gray, 1821 - vespertilionid bats
         Subfamily Myotinae Tate, 1942
           Genus Myotis Kaup, 1829 - mouse-eared bats
             Myotis keaysi Allen, 1914 - hairy-legged myotis
               1 [Myotis keaysi keaysi] Allen, 1914
               2 Myotis keaysi pilosotibialis LaVal, 1973