Card Set Information
-Child (tooth eruption) "Taung Child"
-Deciduous(baby teeth) canines small
-Endocast showed brain stem position changed(foramen magnum)
- "Discovered" in 1912
- Showed that "the brain led the way" in human evolution
- "Proved" earliest hominin was English(not African)
: 600 year-old skull, orangutan mandible.
- Human-like shape of pelvis
- Convergent big toe
- Foramen magnum under skull
- Derived cranial traits shared with later species
- Canine reduction
- Bicuspid premolars
- and Less Prognathism
The "Robust" australopiths
(2.7-2.3mya) E. Africa
(2.3-1.4mya) E. Africa
- Living around the same time as the more gracile
- Skulls probably adapted to a coarse vegetatian diet
The emergence of the genus
- Defined by increased brain size
- Associated with behavioral innovations:
food getting strategies
division of labor & food sharing
Increase in Foraging Complexity
time for brains to grow(cant grow in womb)
time to learn important foraging skills
Division of Labor
Sharing and Cooperation
.. "social insurance"
- More male paternal invesment..
reduced sexual dimorphism
The Pleistocene: First members of the genus
- Most people classify as early
- First discoveries of genus Homo at Olduvai Gorge in Tanzania
- Dating 2.4-1.6 mya (Pleistocene)
- Contemporaneous w/robust australopiths
- Larger brain
- Reduced cheek teeth
A. afarensis, A. arficanus, H. habilis
Homo ergaster (1.8-0.6mya)
- "Turkana Boy"
- Dated to 1.5 mya
- 12 year old male- 5'4"
- Tall & Big Brained
- No chin
- Receding forehead
Homo ergaster tools