Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Chiroptera Blumenbach, 1779 - bats
       Family Vespertilionidae Gray, 1821 - vespertilionid bats
         Subfamily Vespertilioninae Gray, 1821
           Tribe Vespertilionini Gray, 1821
             Genus Hypsugo Kolenati, 1856
               Hypsugo savii (Bonaparte, 1837)
                 Hypsugo savii caucasicus (Satunin, 1901)