Class [Mammalia] Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Family Sciuridae Batsch, 1788 - squirrels, chipmunks, marmots, and prairie dogs
       Subfamily Sciurinae Batsch, 1788 - tree and ground squirrels
         Genus Sciurotamias Miller, 1901 - rock squirrels
           1 Sciurotamias davidianus (Milne-Edwards, 1867) - Père David's rock squirrel
           2 Sciurotamias forresti Thomas, 1922 - Forrest's rock squirrel