Big trends in human evolution
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Big Trends in Human Evolution. Introduction – Human Evolution. Mosaic Evolution: ________________________ With respect to human evolution: _____________________ Developed at varying times along our evolutionary history . But how did we get here?. 1. 2. 3. 4. 5.

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Big Trends in Human Evolution

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Big trends in human evolution

Big Trends in Human Evolution


Introduction human evolution

Introduction – Human Evolution

  • Mosaic Evolution: ________________________

  • With respect to human evolution:

  • _____________________

  • Developed at varying times along our evolutionary history


But how did we get here

But how did we get here?

  • 1.

  • 2.

  • 3.

  • 4.

  • 5.


Anatomical adaptations for bipedalism

Anatomical Adaptations for Bipedalism

  • ___________

    • Increase in ________

    • Changes to hallux

    • __________

  • _______________

    • _____________________


Anatomical adaptations for bipedalism1

Anatomical Adaptations for Bipedalism


Anatomical adaptations for bipedalism2

Anatomical Adaptations for Bipedalism

  • _______________________

    • Increase in surface area

    • Extension ____________

    • __________ - angled towards the middle of the body


Anatomical adaptations for bipedalism3

Anatomical Adaptations for Bipedalism

4. Pelvis

  • _____________________

  • ______________________


Anatomical adaptations for bipedalism4

Anatomical Adaptations for Bipedalism

5. _________________

  • ____________________


Morphological changes

Morphological Changes

  • 6. Foramen Magnum – _______________________

Bipedal – ____________________

Quadrupedal – ______________________


Hominin evolution

Hominin Evolution


Pre dating australopithecus

Pre-dating Australopithecus

  • Hominins discovered in _________________

  • Bipedal – debatable in some species

  • We will focus on the species for which there is ________________of bipedalism


Ardipithecus ramidus

Ardipithecusramidus

  • Middle Awash area of Ethiopia

  • Approximately 4.4mya

  • Found:

    • 1.

    • 2.

    • 3.


Ardipithecus ramidus1

Ardipithecus ramidus

  • Indicators of Bipedalism

    • ____________________

    • Femur and pelvis

    • Humerus – _______________

    • Foot Phalanges ______________


Ardipithecus ramidus2

Ardipithecus ramidus


Ardipithecus ramidus3

Ardipithecus ramidus

  • Ardi = “facultative” biped

    • What do you think this term mean?


Australopithecus afarensis

Australopithecus afarensis

  • _______________

    • Hadar, Ethiopia

    • Laetoli, Tanzania

  • 3.6-3.0 mya

  • Forest, woodland, grassland


A afarensis traits

A. afarensis – Traits

Bipedal

  • 1.

  • 2.

    Some Arboreal Abilities Retained

  • 1.

  • 2.


A afarensis traits1

A. afarensis – Traits


A afarensis traits2

A. afarensis – Traits


Type fossil lucy

Type Fossil – “Lucy”

  • Found: 1974, Hadar, Ethiopia

  • ____________________

    • Both arms

    • Much of the pelvis

    • Left femur, right tibia

    • Hand and Foot bones

  • Adult (based on 3rd molar)

    • _____________


Big trends in human evolution

Type Site: Laetoli Footprints

  • Tanzania

  • 3.6 mya

  • 75 feet long preserved

    • _____________

  • ___________

    • ______________


A new hominin

A New Hominin

  • Australopithecus sediba

    • Discovered in 2008; located in South Africa

    • Proposed by some to be the best candidate __________ _________________


A new hominin1

A New Hominin

  • Features:

    • ________________

    • Pelvis – ________ of Australopithecus-like and Homo-like features

    • Hand –

    • Foot & ankle shape –


The genus homo overall trends

The Genus Homo – Overall Trends

  • Characterized by:


Introduction to homo habilis

Introduction To Homo habilis

  • Contemporaneous with _______________________

  • Anatomically different than specimens assigned to the genus _______________________

  • Distinguishing feature – _________________

    • H. habilis shows an ___________________as compared to Australopithecines


Homo habilis oh 24

Homo habilis – OH 24

  • Location: Olduvia Gorge

  • (Africa)

  • Comparison to Australopithecines:

    • 1.

    • 2.

“Twiggy” or OH 24

Dated to ~ 1.8mya


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