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 californicus (Audubon & Bachman, 1842) - California myotis
               1 [Myotis californicus californicus] (Audubon & Bachman, 1842)
               2 Myotis californicus caurinus Miller, 1897
               3 Myotis californicus mexicanus Saussure, 1860
               4 Myotis californicus stephensi Dalquest, 1946