Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Craniata Linnaeus, 1758 see Subphylum Vertebrata Cuvier, 1812
     Class Mammalia Linnaeus, 1758 - mammals
       Subclass Theria Parker & Haswell, 1897
         Infraclass Placentalia Owen, 1837 see Cohort Placentalia Owen, 1837
           Order Rodentia Bowdich, 1821 - rodents
             Suborder Sciuromorpha Brandt, 1855
               Family Sciuridae Batsch, 1788 - squirrels, chipmunks, marmots, and prairie dogs