Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Infraclass Eutheria Gill, 1872
       Magnorder Boreoeutheria Springer & de Jong, 2001
         Superorder Euarchontoglires Murphy, Stanyon & O'Brien, 2001
           Order Rodentia Bowdich, 1821 - rodents
             Suborder Sciuromorpha Brandt, 1855
               Family Sciuridae Batsch, 1788 - squirrels, chipmunks, marmots, and prairie dogs