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 Nesoryzomys Heller, 1904 - Galapagos rice rats
           1 ‡Nesoryzomys darwini Osgood, 1929
           2 Nesoryzomys fernandinae Hutterer & Hirsch, 1979
           3 ‡Nesoryzomys indeffesus see Nesoryzomys indefessus Thomas, 1899
           4 Nesoryzomys narboroughi see Nesoryzomys indefessus narboroughi
           5 ‡Nesoryzomys swarthi Orr, 1938