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
                       1 Family Octodontidae Waterhouse, 1840 - octodonts
                       2 Family Ctenomyidae Lesson, 1842 - tuco-tucos
                       3 Family Abrocomidae Miller & Gidley, 1918 - chinchilla-rats
                       4 Family Echimyidae Gray, 1825 - spiny rats
                       5 Family Capromyidae Smith, 1842 - hutias and nutria
                       6 Family Myocastoridae Ameghino, 1902