Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Infraclass Eutheria Gill, 1872
       Magnorder Boreoeutheria Springer & de Jong, 2001
         Superorder Euarchontoglires Murphy, Stanyon & O'Brien, 2001
           Order Rodentia Bowdich, 1821 - rodents
             Suborder Hystricomorpha Brandt, 1855
               Infraorder Hystricognathi Tullberg, 1899
                 Superfamily Cavioidea Fischer de Waldheim, 1817
                   1 Family Cuniculidae Miller & Gidley, 1918
                   2 Family Caviidae Fischer de Waldheim, 1817 - cavies and Patagonian "hares"
                   3 Family Dasyproctidae Gray, 1825 - agoutis and pacas