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Evolution of Primates. Primates. Are a group of mammals that includes lemurs, monkeys, apes and humans Although a diverse group, they share many traits in common Have the largest brains (compared to body size). Shared Traits. Rounded heads with flattened faces Large brain

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primates
Primates
  • Are a group of mammals that includes lemurs, monkeys, apes and humans
  • Although a diverse group, they share many traits in common
  • Have the largest brains (compared to body size)
shared traits
Shared Traits
  • Rounded heads with flattened faces
  • Large brain
  • Flexible joints (hips/shoulders)
  • Opposable thumbs
  • Binocular vision
  • Feet that can grasp
primate origins
Primate Origins
  • All primates have similarities that lead scientists to believe they have a shared evolutionary history
  • Using fossil evidence, comparative anatomy, genetic and biochemical studies biologist have classified how primates evolved and diverged
human like primates evolve
Human like primates evolve
  • A divergence of primates led to group of primates being formed called anthropoids
    • These are human like primates
      • Include hominoids, and new and old world monkeys
    • Tended to be larger and to have a larger brain, and an upright posture
    • Hominoids= apes (orangutans, gibbons, chimpanzees, bonobos, and gorillas) and humans
anthropoids
Anthropoids
  • Fossils are found worldwide
  • However hominoid fossil only found in Asia and Africa
    • For this reason it is believed that humans evolved in Africa
hominoids
Hominoids
  • Are broken down into 2 groups
    • 1. Primates that can walk upright on two legs
      • Gorillas chimpanzees, bonobos
    • 2. Humans (hominids)
      • Bipedal humans and their ancestors
early hominids
Early Hominids
  • The fossil record from 3.2 myashowsthat early hominids walked upright, but looked both apelike and humanlike
    • 2 lineages
      • Australopithecus
      • Homo genus (including homo sapiens)
homo genus
Homo Genus
  • The homo genus begins to thrive about 1.5-2 mya and the fossil record shows tools being used
  • At about 1.8 mya we see the home genus begin to use fire and hunt.
  • As the fossil record progresses we see evidence of culture developing and the modern homo sapiens