Chapter 14.1 Earliest Hominins

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Info Pertaining, Doesn't Include Actual Hominins

1st Year

Last updated 5:20 PM on 6/10/26
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7 Terms

1
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5 Hominid Derived Traits

  1. Dental Characteristics

  • Reduction Of Canines, Thicker Enamel

  1. Large Brain-To-Body Ratio

  • Bigger Brains, Cognition & Life History

  1. Slow Maturation

  • Long Gestation, Juvenile Period

  1. Complex Symbolic Material Culture

  • Use Of Tools, Reliance On Tech, Symbolism

  1. Habitual Bipedalism

  • Comes First

2
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Adaptations For Walking

  • Foramen Magnum At Bottom Of Skull

  • Flared Pelvis & Long Neck Femur

  • Big Toe Not Opposable

3
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Chimp Bipedalism

  • Bent Hip/Knee

  • COG Forward

  • Constant Use Of Muscles

4
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Hominid Bipedalism

  • Extended Hip/Knee & Lumbar Curve

  • COG In Line With Major Joints

  • Stable, Not Much Muscle Activity

5
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Reason’s For Bipedalism?

  • Hunting & Carrying Stuff

  • Endurance Run

  • Thermoregulation

  • Energy Efficient

6
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Talks About Earliest Hominins & Pre-Australopiths

  • Controversial If Really Hominins

  • Primitive Features Retained

  • Amrs Retain Aboreal Features

7
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What Did First Hominins Tell Us?

  • More Widespread

  • Bipedalism, Woodlands

  • Need More Fossils