14. origins of bipedalism

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Last updated 2:23 AM on 7/26/26
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5 Terms

1
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Features associated with habitual bipedalism

  • Short toes.w big toe in line

  • Double arched foot

  • Broad knee joint

  • Valgus knee

  • Broad and short pelvis (bowl shaped)

  • centered/anteriorly positioned foramen magnum

  • S-curve to spine

  • Short wide vertebrae


2
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Features we look for to place ape into our lineage

  • Bipedal

  • Small canines


3
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Sahelanthropus tchadensis

Thought to be hominin because of potential bipedalism

  • central/anteriorly placed foramen magnum

  • Small canines


<p><strong>Thought to be hominin because of potential bipedalism</strong></p><ul><li><p><span style="background-color: transparent;">central/anteriorly placed foramen magnum</span></p></li><li><p><span style="background-color: transparent;">Small canines</span></p></li></ul><p></p>
4
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Orrorin tugenensis

Thought to be hominin because of potential bipedalism

  • Femur has a thick neck on the inferior side (reinforced for bipedalism)


<p><strong>Thought to be hominin because of potential bipedalism</strong></p><ul><li><p><span style="background-color: transparent;">Femur has a thick neck on the inferior side (reinforced for bipedalism)</span></p></li></ul><p></p>
5
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Ardipithecus

Thought to be hominin because of potential bipedalism

  • central/anteriorly placed foramen magnum

  • Small canines

  • Retains arboreal features in upper extremity, long arms, divergent big toe

  • Bowl shaped pelvis


<p><strong>Thought to be hominin because of potential bipedalism</strong></p><ul><li><p><span style="background-color: transparent;">central/anteriorly placed foramen magnum</span></p></li><li><p><span style="background-color: transparent;">Small canines</span></p></li><li><p><span style="background-color: transparent;">Retains arboreal features in upper extremity, long arms, divergent big toe</span></p></li><li><p><span style="background-color: transparent;">Bowl shaped pelvis</span></p></li></ul><p></p>