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The First Bipeds Key Terms

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Arid plains environment of eastern Africa. Ardipithecus ramidus. One of the earliest hominins that lived in eastern Africa about 5.8 to 4.4 million years ago. diastema ... – PowerPoint PPT presentation

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Title: The First Bipeds Key Terms


1
Chapter 6
  • The First Bipeds Key Terms

2
  • Australopithecus The first well-known hominine
    lived between 4.2 and 1 m.y.a. Characterized by
    bipedal locomotion when on the ground, but with
    an apelike brain includes at least five species
    afarensis, africanus, anamensis, boisei, and
    robustus.

3
 
  • savannah Arid plains environment of eastern
    Africa.
  • Ardipithecus ramidus One of the earliest hominins
    that lived in eastern Africa about 5.8 to 4.4
    million years ago.

4
  • diastema A space between the canines and other
    teeth allowing large projecting canines space
    within the jaw.
  • Kenyanthropus platyops A new proposed hominin
    contemporary with early australopithecines may
    not be separate genus.

5
  • gracile australopithecines Members of the genus
    Australopithecus possessing a more lightly built
    chewing apparatus.
  • robust australopithecines Slightly larger and
    more robust than gracile members of genus
    Australopithecus, with larger, more powerful jaws
    and teeth.

6
 
  • sagittal crest A crest running from front to back
    on the top of the skull in the midline to provide
    a surface of bone 0for the attachment of the
    large chewing muscles.  
  • law of competitive exclusion When two closely
    related species compete for the same niche, one
    will out-compete the other, bringing about the
    latters extinction.
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