Class [Mammalia] Linnaeus, 1758 - mammals Order Rodentia Bowdich, 1821 - rodents Family Octodontidae Waterhouse, 1840 - octodonts Genus Octomys Thomas, 1920 - viscacha rats 1 Octomys barrerae see Tympanoctomys barrerae (Lawrence, 1941) 2 Octomys mimax Thomas, 1920 - viscacha-rat