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Homo ergaster is an extinct species or subspecies of archaic humans who lived in Africa in the Early Pleistocene.Whether H. ergaster constitutes a species of its own or should be subsumed into H. erectus is an ongoing and unresolved dispute within palaeoanthropology.
It was conjectured that the categorical differences seen in for instance the mandibular and dental features of the crania from Dmanisi, may be ascribed to taxonomic diversity, as opposed to all five deriving from the same H. erectus lineage. [5] The rather small braincase of D2700 was believed to be at odds with the characteristics of H. erectus.
Homo erectus (/ ˌ h oʊ m oʊ ə ˈ r ɛ k t ə s / lit. ' upright man ') is an extinct species of archaic human from the Pleistocene, spanning nearly 2 million years.It is the first human species to evolve a humanlike body plan and gait, to leave Africa and colonize Asia and Europe, and to wield fire.
KNM-ER 3883 is a significant fossil specimen of early African Homo erectus, dating to approximately 1.5–1.6 million years ago.This cranium, discovered in Kenya, has an endocranial volume exceeding 800 cc, which is substantially larger than earlier Homo species and suggests a notable increase in brain size.
Leakey named it "Chellean Man", in reference to the Oldowan tools found at the site, which were then referred to by the now-obsolete name Chellean.Heberer (1963) provisionally named a new species Homo leakeyi based on the specimen in honor of Leakey, [3] but most subsequent workers have regarded it as Homo ergaster, or as Homo erectus (H. ergaster is sometimes regarded as a subspecies of H ...
Homo erectus derives from early Homo or late Australopithecus. Homo habilis , although significantly different of anatomy and physiology, is thought to be the ancestor of Homo ergaster , or African Homo erectus ; but it is also known to have coexisted with H. erectus for almost half a million years (until about 1.5 Ma).
Homo ergaster (a.k.a. African Homo erectus) 1975 Kenya: Lantian Man: 1.62±0.03 Homo erectus: 1963 Lantian County, China: Woo Ju-Kang KNM-WT 15000 (Turkana Boy) 1.60 Homo ergaster (a.k.a. African Homo erectus) 1984 Lake Turkana (West Lake Turkana), Kenya: Kamoya Kimeu: Kenya National Museum Peninj Mandible: 1.50 Paranthropus boisei: 1964 ...
A few scholars believed that the region didn't preserve any species of Homo, arguing that the fossil material all belonged to australopithecines. Others believed that a single species was represented (H. ergaster) and others accepted the presence of both H. ergaster/H. erectus and H. habilis. [4]