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 Microcavia niata (Thomas, 1898) - Andean mountain cavy