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 Echimyinae Gray, 1825
           1 Genus Diplomys Thomas, 1916
           2 Genus Echimys Cuvier, 1809 - arboreal spiny rats
           3 Genus Isothrix Wagner, 1845 - toros
           4 Genus Makalata Husson, 1978