Class Mammalia Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Suborder Hystricognathi Tullberg, 1899 see Infraorder Hystricognathi Tullberg, 1899
       Family Capromyidae Smith, 1842 - hutias and nutria
         Subfamily Plagiodontinae Ellerman, 1940 see Family Capromyidae Smith, 1842
           Genus Plagiodontia Cuvier, 1836 - Hispaniolan hutias
             1 Plagiodontia aedium F. Cuvier, 1836 - Hispaniolan hutia
             2 ‡Plagiodontia araeum Ray, 1964
             3 ‡Plagiodontia ipnaeum Johnson, 1948