Primate and Hominin Origins

1
Chapter 8

• Primate and Hominin Origins

2
What are these?

• Primate
• Australopithecine
• Homo
• Hominin

3
Primates Review
Me too!
Go back to the chart on pg. 129
4
Becoming Human review

• Lucy and bipedalism
• Habitual vs. Obligate Bipedalism
• Ossa Coxae
• Foot as stable support
• Longer legs
• Full knee extension

5
Lucy and Human pelvic structure

• Pelvis is comparatively much shorter and broader
  than an Apes and extends around to the side,
  stabilizing the line of weight transmission from
  lower back to hip joint
• Example

6
Human Os Coxae

• The human os coxae is composed of three bones
  (right side shown).

7
Ossa Coxae (hip bones)

• (a) Homo sapiens.
• (b) Early hominin from South Africa.
• (c) Great ape.
• Note the length and breadth of the iliac blade
  (boxed) and the line of weight transmission.

8
More Ossa Coxae
9
Foot as stable suport
10
Longer legs, full knee extension
Land on heal         Push off toes        
Longer limbs to maximize movement        
Full extension of Knee
11
Femur - The femur is angled inward, keeping legs
under the body