Class Mammalia Linnaeus, 1758 - mammals
Count: 29o;11f;21g; ‡1f
   Subclass Theria Parker & Haswell, 1897
  Count: 28o;9f;21g; ‡1f
     Order Lagomorpha Brandt, 1855 - lagomorphs
    Count: [*] 2f;12g;91s;239ss; ‡1f;1g;1s
       Family Ochotonidae Thomas, 1897 - pikas
      Count: [*] 1g;30s;52ss
         Genus Ochotona Link, 1795 - pikas
        Count: [*] 30s;52ss
           Subgenus Pika Lacépède, 1799
          Count: [*] 8s;22ss
             Ochotona hyperborea (Pallas, 1811) - northern pika
            Count: [*] 9ss
               Ochotona hyperborea yesoensis Kishida, 1930
              Count: -