Class [Mammalia] Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Family Caviidae Fischer de Waldheim, 1817 - cavies and Patagonian "hares"
       Genus Microcavia Gervais & Ameghino, 1880 - mountain cavies
         1 Microcavia australis (I. Geoffroy & d'Orbigny, 1833) - southern mountain cavy
         2 Microcavia niata (Thomas, 1898) - Andean mountain cavy
         3 Microcavia shiptoni (Thomas, 1925)