Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Order Lagomorpha Brandt, 1855 - lagomorphs 1 Family Ochotonidae Thomas, 1897 - pikas 2 Family ‡Prolagidae Gureev, 1964 3 Family Leporidae Batsch, 1788 - hares and rabbits