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"
         Subfamily Caviinae Fischer de Waldheim, 1817
           Genus Cavia Pallas, 1766 - cavies
             1 Cavia aperea Erxleben, 1777
             2 Cavia fulgida Wagler, 1831
             3 Cavia magna Ximinez, 1980
             4 Cavia porcellus (C. Linnaeus, 1758) - domestic Guinea pig
             5 Cavia tschudii Fitzinger, 1857 - montane guinea pig