Sites:
East Africa: East Turkana, Kenya; Olduvai Gorge, Tanzania; Bouri, Ethiopia; Buia, Eritrea South Africa: Swartkrans Age: 1.8 to ~ 1 mya Type specimen: KNM-ER 992 (mandible) Specimens: possibly Nariokotome (WT 15000), KNM-ER 3733, SK 847, and KNM-ER 3883, KNM-ER 2598, KNM-ER 1808 etc. Cranial capacity: 700-1250 cm3 (900 cm3 mean) Cranial architecture: Differs from early habilines by:
Dentition: Narrower M1s and lower canines Postcranial: rib-cage is barrel-shaped rather than conical, the pelvis is narrower and in body proportions, similar to modern humans, with lower limbs indicating a full striding gait. Environment: dryer, more seasonal African environments Length and weight: Tools: Ancestor: possibly H. habilis Descendants: possibly H.erectus? General: While some consider H. ergaster a separate species from H. erectus, the evidence separating the two may not be significant. However, some differences between the two groups include: Differences between H. erectus and H. ergaster: Homo erectus:
Homo ergaster
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