Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Mammalia Linnaeus, 1758 - mammals
               Subclass Eutheria Gill, 1872 see Infraclass Eutheria Gill, 1872
                 Order Rodentia Bowdich, 1821 - rodents
                   Suborder Caviomorpha Wood & Patterson, 1955 see Parvorder Caviomorpha Wood & Patterson, 1955
                     Superfamily Octodontoidea Waterhouse, 1839
                       Family Octodontidae Waterhouse, 1840 - octodonts
                         4.2.2.0 Genus Aconaemys Ameghino, 1891 - rock rats see Genus Pithanotomys Ameghino, 1887
                         4.2.4 Genus Octomys Thomas, 1920 - viscacha rats
                         4.2.5 Genus Tympanoctomys Yepes, 1941
                         4.2.6 Genus Spalacopus Wagler, 1832 - coruro
                         4.2.7 Genus Octodontomys Palmer, 1903 - chozchoz
                         4.2.8 Genus Octodon Bennett, 1832 - degus