Class Mammalia Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Suborder Sciurognathi (Tullberg, 1899) see Suborder Sciuromorpha Brandt, 1855
       01 Family Aplodontidae Trouessart, 1897, orth. inval. - sewellel see Family Aplodontiidae Brandt, 1855
       02 Family Sciuridae Batsch, 1788 - squirrels, chipmunks, marmots, and prairie dogs
       03 Family Castoridae Batsch, 1788 - beavers
       04 Family Geomyidae Bonaparte, 1845 - pocket gophers
       05 Family Heteromyidae Gray, 1868 - pocket mice, kangaroo rats, and kangaroo mice
       06 Family Dipodidae Fischer de Waldheim, 1817 - jerboas
       07 Family Muridae Batsch, 1788 - rats, mice, hamsters, voles, lemmings, and gerbils
       08 Family Anomaluridae Gervais, 1849 - scaly-tailed squirrels
       09 Family Pedetidae Gray, 1825 - springhare
       10 Family Ctenodactylidae Gervais, 1853 - gundis
       11 Family Myoxidae Gray, 1821 see Family Gliridae Muirhead, 1819