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 ‡Heteropsomyinae Anthony, 1917
           1 Genus ‡Boromys Miller, 1916
           2 Genus ‡Brotomys Miller, 1916
           3 Genus ‡Heteropsomys Anthony, 1916
           4 Genus ‡Puertoricomys Woods, 1989