synapomorphies: a trait that is shared by 2+ taxa and (presumably) by their most recent common ancestor, but no other ancestors.
All of the above
Reduced facial prognathism
More anteriorly positioned foramen magnum
Increased cranial vault thickness
Reduced postorbital constriction
It suggests H. ergaster had less breath control than H. sapiens and therefore not enough capacity for modern speech (despite having Broca's area). This is 1 of 2 main differences between H. ergaster and H. sapiens
H. ergaster males were 20% larger than females. Modern human males are 15% larger than females and Australopithecine males were 50% larger than females. A behavioral interpretation may suggest less male competition for females because of a shift towards m
Asia was only known for its Olduwan tool industry (Asian H. erectus).
The difference in tools deposits found between Asia (Asian H. erectus) and Africa (H. ergaster / African H. erectus) was noticed by Hallam Movius resulting in the Movius line. Separating Asia from African and Europe by stone tools. Possibly accredited to
Homo ergaster was the first hominid to extend its range beyond the tropics. Moved into colder regions (Chins, Germany) and moved during long, cold glacial period.
H. erectus is a broad species across a wide geographic range. Most H. erectus Asia sites (Java) are poorly dated (1.8Ma - 143Ka). Better dates are present in Zhoukoudian locality 1, China (800Ka-400Ka)
Some H. erectus sites are places of flowing water
Most were discovered by non-specialists
Some H. erectus sites are places where carnivores accumulate remains
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