L13 Flashcards
Homo erectus facts and features
- Essentially earliest discovered hominid
- Long legs
- Skull cap
- Occupied Java 1-1.8Ma
- Most people mistook it for an ape
Peking man
- Also H erectus
- 0.4-0.7 Ma
- Various sites across eastern China
Piltdown forgery
- Both java and Peking man recognised as Homo erectus
Where would we find H ergaster and H erectus
- Oldest 1.9Ma
- China 0.75Ma
- Java 1.8Ma
- Subsequently recognised in Africa 1.9Ma
- Georgia 1.7 Ma
- Europe 0.5Ma
- Homo Erectus was the first hominin outside of Africa
What was the first Hominin outside of Africa?
Homo Erectus
Lake Turkana Africa
- 1985
- 1.5Ma specimen
- Near complete specimen
- Tall, upright, large brained hominin
- Large range of variation in skull characteristics
- Differences are within a range that allows them to be two species
Current view of Ergaster and Erectus evolution
- Homo ergaster Africa 1.5-1.9Ma
- Homo erectus outside of Africa 0.5-1.8Ma
Two different species
Did they differentiate in Africa and Ergaster moved out, or on the route to Asia erectus evolved into ergaster?
- Potentially Habilis evolved from something close to Africanus and homo evolved from this, although Rudolfensis may have evolved from K. platyops and is an evolutionary blind alley.
- Habilis gives rise to ergaster which gives rise to erectus
- Ergaster is basal then erectus
Clearly H. ergaster/ erectus migrated out of Africa
- At least by 1.8Ma moved out of Africa
- Happened quickly
- Ice retreats and expansions can cause quick migration
- Migration from Africa to East Asia could have taken a mere 25,000 years based on the glacial pace of population expansion of only 15 km per generation
Did Ergaster co-exist? And who with?
Yes, with multiple species of Australopithecines and Homo in Africa
Did H erectus co-exist
beyond Africa H erectus was probably the sole hominin in these regions
What was H ergaster/ erectus like?
- Similar to modern humans but more robust and heavily muscled due to physical requirements
- First molars erupted at 4.6 years and lifespan of 53 years
- Decreasing sexual dimorphism may reflect change in social structure and dynamics eg more male-male cooperation
- Hole through which spinal column ran is small indicating smaller demand for never signal traffic and possibly less control over breathing (no speech?)
Australopithecine brain capacity
400cc
- small in size species
H habilis brain capacity
650cc
H erectus brain capacity
850cc
Larger in body size
H sapiens brain capacity
1350cc
How was H ergaster/ erectus a new grade of hominin? (5 reasons)
- First indication of extended childhood
- Systematic tool making
- First use of fire
- The appearance of systematic hunting and genuine home bases
- The first migration of hominins beyond Africa
The first indication of extended childhood
- costly to parent as have to get provisions
- but enables learning
Systematic tool making
- They invented a new type of toolkit
- Acheulian tools
- Most developed thus far
- Tool fossil records Indicate migration of erectus/ergaster
- Useful in absence of bones
- Lots of evidence of animal from tool use
- Tool making requires flint, obsidian
- Efficient in cutting meat, skinning animals
- Some still have starch grains and evidence of meat consumption suggesting their diet
When did these Acheulian tools appear?
- Africa 1.4Ma
- Israel 1.0Ma
- Europe 0.9Ma
- These tools never make it to East Asia = the movius line
Explanations for this:
1. These regions have high bamboo so perhaps this was an easier alternative 2. As man migrated out they migrated out before technology evolved, nothing followed them 3. Technology was developed prior to migration but a corridor of incorrect rock on the way to asia meant they couldn’t make it and then eventually forgot how to make these tools
The movius line
Tools never make it to East Asia
First use of fire
- Burnt tools, bones and charcoal
- Heat, cooking and fending off animals
The appearance of systematic hunting and genuine home bases
- Evidence for hunting eg fire, tools
- Extended childhood and tools suggest home bases
How did H ergaster / erectus live?
- Research based on current hunter gatherer societies in late 20th century
- Sometimes is not correct, has to be sensibly interpreted