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Hominid Evolution. Primate Classification. When did we split from other Primates?. Primates. ~25 million years ago: Old World Monkeys split from Hominoids , a linage that resulted in humans, gorillas and chimps

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hominid evolution

Hominid Evolution

Primate Classification

  • ~25 million years ago: Old World Monkeys split from Hominoids, a linage that resulted in humans, gorillas and chimps
  • ~17 million years ago: Great apes (Hominidae) including orang-utans, gorillas and humans, branched off from the lesser apes, which includes gibbons
  • ~10 million years ago: Organ-utans branched off within the Hominidae linage
  • ~5 million years ago: Hominids, including Homo sapiens, branched off from Chimpanzees
features common to all new world monkeys
Features Common to All New World Monkeys
  • Prehensile tail that can be used as a 5th limb
  • Quadrupedal
  • Strictly tree dwelling (arboreal)
  • Widely separated nostrils
features common to all old world monkeys
Features Common to All Old World Monkeys
  • Tail is not prehensile
  • Quadrupedal
  • Some are ground dwelling
  • Nostrils are close together and open downwards
features common to all hominoids
Features Common to All Hominoids
  • No tail
  • Semi-erect or fully erect posture
  • Broad chest, pelvis and shoulders
  • Relatively long arms and mobile shoulder joints
  • Larger brain
features common to all apes
Features Common to All Apes
  • Some brachiating (swinging underneath from branch to branch)
  • Some mainly ground dwelling and quadrupedal
  • Flattened nose
  • Bony eye ridges
features of hominids
Features of Hominids
  • Bipedal
  • Large forebrain (cerebral cortex)
  • Reduced teeth in general, particularly canines
  • Possessed to varying degrees
    • Nose and chin are prominent
    • Reduced eye ridges
    • Highly sensitive skin*
    • Body hair very reduced to assist cooling *
    • Complex social behaviour

* Assumed

game name that primate group
GAME: Name That Primate Group
  • Name the primate group that the organism pictured belongs to
    • New World Monkeys
    • Old World Monkeys
    • Apes
    • Hominids
  • Give one example of a feature of this group