Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Craniata Linnaeus, 1758 see Subphylum Vertebrata Cuvier, 1812
     Class Mammalia Linnaeus, 1758 - mammals
       Subclass Theria Parker & Haswell, 1897
         Infraclass Placentalia Owen, 1837 see Cohort Placentalia Owen, 1837
           Order Rodentia Bowdich, 1821 - rodents
             Suborder Hystricomorpha Brandt, 1855
               Infraorder Hystricognathi Tullberg, 1899
                 Family Hystricidae Fischer de Waldheim, 1817 - Old World porcupines