#protohippus  Pliocene horse approaching donkeys in size
  supertype:  horse__Equus_caballus  solid-hoofed herbivorous quadruped domesticated since prehistoric times
  member of:  genus_Protohippus  a genus of Equidae
     member of:  family_Equidae__Equidae  horses; asses; zebras; extinct animals
        member of:  order_Perissodactyla__Perissodactyla  nonruminant ungulates: horses; tapirs; rhinoceros; extinct forms
           member of:  subclass_Eutheria__Eutheria  all mammals except monotremes and marsupials
              member of:  class_Mammalia__Mammalia  warm-blooded vertebrates characterized by mammary glands in the female
                 member of:  subphylum_Vertebrata__Vertebrata__Craniata__subphylum_Craniata  fishes; amphibians; reptiles; birds; mammals
                    member of:  phylum_Chordata__Chordata  comprises true vertebrates and animals having a notochord
                       member of:  kingdom_Animalia__Animalia__animal_kingdom  taxonomic kingdom comprising all living or extinct animals

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