Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Chiroptera Blumenbach, 1779 - bats
       Family Phyllostomidae Gray, 1825 - New-World leaf-nosed bats
         Subfamily Glossophaginae Bonaparte, 1845
           Tribe Glossophagini Bonaparte, 1845
             "choeronycterines"
               Genus Hylonycteris Thomas, 1903 - Underwood's long-tongued bat
                 Hylonycteris underwoodi Thomas, 1903 - Underwood's long-tongued bat
                   1 [Hylonycteris underwoodi underwoodi] Thomas, 1903
                   2 Hylonycteris underwoodi minor Phillips & Jones, 1971