ANT101H5 Lecture Notes - Acheulean, Zhoukoudian, Hand Axe

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10 Mar 2013
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Chapter 10- Lecture Notes
General Points Early Hominins
Australopiths (and early Homo)
Figure 9-27; pp. 228-229
4mya 1 mya time of a diversity
More species of hominins
Diversity of Species/Adaptive Radiation
Variety of Adaptive radiation
More species are adaptive to semi-forested areas
Why is there so many species at this time and not afterwards? (page 228)
They didn’t travel much and tended to stay in small groups while interbreed
in small groups (genetic drift)
Increasing diversion of genetic groups and speciation due to lack of travel
Brain Size
People generally assumed there was a gradual increase in brain size
When you take into account their body size differences, (ratio or brain and
body size), it is flat line in terms of brain size for 3 million year
Therefore not a lot of change in brain size
There is an increase in brain size from the pre-australopiths
There is an increase in the later homo line
Development in Children
Salam
Starting a trajectory a longer biological development in children
Timing
Later australopiths & Early Homo OVERLAP for more than a million years
On the landscape at the same time for over 1 million years
Figure 9-34
2 or 3 species of Homo running around as well as the autralopiths (huge
diversity)
Early Homo
Time and Place
2.0+ to 1.4 mya
Africa
Biological Remains
***Figure 9-31 for each species showing distribution of the maps
Compared to the austraopiths, early homo had great brain to body size, their
foreheads are a bit higher, teeth start to get smaller and narrower
Early Homo Culture
Stone tools (Oldowan assemblage which have a particular set of groups)
Types of tools and how they were made are discussed on pages 225-226
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