Class Mammalia Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Suborder Hystricognathi Tullberg, 1899 see Infraorder Hystricognathi Tullberg, 1899
       Family Echimyidae Gray, 1825 - spiny rats
         Subfamily Dactylomyinae Tate, 1935
           1 Genus Dactylomys Geoffroy Saint-Hilaire, 1838 - coro-coros
           2 Genus Kannabateomys Jentink, 1891 - rato de Taquara
           3 Genus Olallamys Emmons, 1988