Class [Mammalia] Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Family Octodontidae Waterhouse, 1840 - octodonts
       1 Genus Octodon Bennett, 1832 - degus
       2 Genus Octodontomys Palmer, 1903 - chozchoz
       3 Genus Spalacopus Wagler, 1832 - coruro
       4 Genus Aconaemys Ameghino, 1891 - rock rats see Genus Pithanotomys Ameghino, 1887
       5 Genus Octomys Thomas, 1920 - viscacha rats