equine

• The history of the horse family began during the?

  Eocene Epoch lasted from about 56 million to 33.9 million years ago
• During the early Eocene there appeared the first ancestral horse, a hoofed, browsing mammal designated correctly as

  Hyracotherium but more commonly called Eohippus, the “dawn horse.”
• ____ horse is believed to be the only remaining example of a wild horse— i.e., the last remaining modern horse to have evolved by natural selection

  Przewalski's
• ___ a genus from the middle Eocene,

  Orohippus
• ___ a genus from the late Eocene,

  Epihippus
• In ___ the premolars and molars were clearly distinct, the molars being larger.

  Eohippus
• ___ both the third and fourth premolars had become molarlike

  Epihippus
• True/ False

  the individual cusps that characterized the cheek teeth of Eohippus had given way in Epihippus to a system of continuous crests or ridges running the length of the molars and molariform premolars

  
  

  
  

  TRUE
• ____ the next important ancestor of the modern horse, are found in the early and middle Oligocene of North America (the Oligocene Epoch lasted from about 33.9 million to 23 million years ago)

  Fossils of Mesohippus
• true/false

  By the late Oligocene, Mesohippus had evolved into a somewhat larger form known as Miohippus.

  True