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 Chelemys Thomas, 1903 - greater long-clawed mice
             1 Chelemys macronyx (Thomas, 1894) - Andean long-clawed akodont
             2 Chelemys megalonyx (Waterhouse, 1844[1845]) - large long-clawed akodont