Class Mammalia Linnaeus, 1758 - mammals
Status: extant; Count: [*] 26o;133f;1112g;4545s;7ss; ‡3f;23g;88s; †1g;9s
   Order Rodentia Bowdich, 1821 - rodents
  Status: extant; Count: [*] 28f;427g;1970s; ‡1f;16g;48s; †1g;4s
     Suborder Hystricognathi Tullberg, 1899 see Infraorder Hystricognathi Tullberg, 1899
    Status: extant; Count: [*] 17f;57g;208s; ‡1f;11g;24s
       Suborder Hystricognathi Tullberg, 1899 see Infraorder Hystricognathi Tullberg, 1899
      Status: extant; Count: [*] 17f;57g;208s; ‡1f;11g;24s
         Family Octodontidae Waterhouse, 1840 - octodonts
        Status: extant; Count: [*] 6g;9s
           Genus Octomys Thomas, 1920 - viscacha rats
          Status: extant; Count: [*] 1s
             1 Octomys mimax Thomas, 1920 - viscacha-rat
            Status: extant; Count: -