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 hyperborea (Pallas, 1811) - northern pika Ochotona hyperborea mantchurica Thomas, 1909