Class Mammalia Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Suborder Sciurognathi (Tullberg, 1899) see Suborder Sciuromorpha Brandt, 1855
       Family Muridae Batsch, 1788 - rats, mice, hamsters, voles, lemmings, and gerbils
         Subfamily Sigmodontinae Wagner, 1843
           Genus Habromys Hooper & Musser, 1964 - crested-tailed deer mice and slender-tailed deer mice
             1 Habromys chinanteco Robertson & Musser, 1976
             2 Habromys lepturus Merriam, 1898
             3 Habromys lophurus Osgood, 1904 - crested-tailed mouse
             4 Habromys simulatus Osgood, 1904 - Jico deer mouse