Class [Mammalia] Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Family Muridae Batsch, 1788 - rats, mice, hamsters, voles, lemmings, and gerbils
       Subfamily Hesperomyinae Murray, 1866 - New-World mice and rats see Subfamily Sigmodontinae Wagner, 1843
         Genus Calomys Waterhouse, 1837 - vesper mice
           1 Calomys callidus Thomas, 1916
           2 Calomys callosus Rengger, 1830
           3 Calomys fecundus see Calomys boliviae Thomas, 1901
           4 Calomys hummelincki Husson, 1960
           5 Calomys laucha Fischer, 1814
           6 Calomys lepidus (Thomas, 1884) - graceful laucha
           7 Calomys musculinus (Thomas, 1913)
           8 Calomys sorellus Thomas, 1900