Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Lagomorpha Brandt, 1855 - lagomorphs
       Family Ochotonidae Thomas, 1897 - pikas
         Genus Ochotona Link, 1795 - pikas
           Subgenus Pika Lacépède, 1799
             Ochotona princeps (Richardson, 1828) - American pika
               1 [Ochotona princeps princeps]ᵀ (Richardson, 1828)
               2 Ochotona princeps figginsi Allen, 1912
               3 Ochotona princeps saxatilis Bangs, 1899
               4 Ochotona princeps schisticeps (Merriam, 1889)
               5 Ochotona princeps taylori Grinnell, 1912