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
           Genus Diplomys Thomas, 1916
             1 Diplomys caniceps (Günther, 1876)
             2 Diplomys labilis (Bangs, 1901) - gliding spiny rat
             3 Diplomys rufodorsalis (J.A. Allen, 1899) see Santamartamys rufodorsalis (J.A. Allen, 1899)