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Ardipithecus ramidus (Prehuman Species)

Ardipithecus ramidus Basic Facts:
  • Called "Ardi" for short.
  • Oldest nearly complete pre-human species yet found.
  • Ardipithecus ramidus lived ~ 4.4 million years ago in what is now Ethiopia.
Ardipithecus ramidus Functional Anatomy:
  • Ardi walked upright.
  • Teeth resemble modern human teeth more closely than chimpanzee teeth.
  • The teeth structure suggest Ardipithecus was probably an omnivore - eating anything that it could find.
  • Feet were capable of grasping, similar to chimps, enabling them to climb in trees.
  • Small back to Ardi's skull, indicating they have a small brain.
Ardipithecus ramidus Fossil Record:
  • Ardipithecus bone fragments came from a layer of rock beneath the Afar region of Ethiopia.
  • The Afar region is now desert, though it was a woodland 4 million years ago.
  • Ardipithecus ramidus is 1.2 million years older than Lucy (Australopithecus afarensis).
  • The oldest fossil identified as a hominid, Sahelanthropus tschadensis, dates between 6 million and 7 million years old (but this is based on a few pieces of the Sahelanthropus skull)
  • Orrorin tugenensis, is another hominid species which is 6 million years old (though this is represented by little more than a leg bone).

Posted by ALCHEssMIST.
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