Class Mammalia Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Suborder Hystricognathi Tullberg, 1899 see Infraorder Hystricognathi Tullberg, 1899
       Family Octodontidae Waterhouse, 1840 - octodonts
         1 Genus Aconaemys Ameghino, 1891 - rock rats see Genus Pithanotomys Ameghino, 1887
         2 Genus Octodon Bennett, 1832 - degus
         3 Genus Octodontomys Palmer, 1903 - chozchoz
         4 Genus Octomys Thomas, 1920 - viscacha rats
         5 Genus Spalacopus Wagler, 1832 - coruro
         6 Genus Tympanoctomys Yepes, 1941