Class Mammalia Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Suborder Hystricognathi Tullberg, 1899 see Infraorder Hystricognathi Tullberg, 1899
       Family Hystricidae Fischer de Waldheim, 1817 - Old World porcupines
         1 Genus Atherurus Cuvier, 1829 - brush-tailed porcupines
         2 Genus Hystrix Linnaeus, 1758 - short-tailed porcupines
         3 Genus Trichys Günther, 1877 - long-tailed porcupine