Class Mammalia Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Suborder Hystricognathi Tullberg, 1899 see Infraorder Hystricognathi Tullberg, 1899
       Family Caviidae Fischer de Waldheim, 1817 - cavies and Patagonian "hares"
         1 Subfamily Caviinae Fischer de Waldheim, 1817
         2 Subfamily Dolichotinae Pocock, 1922