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There is still no wide consensus as to whether or not H. habilis is ancestral to H. ergaster / H. erectus or is an offshoot of the human line, [19] and whether or not all specimens assigned to H. habilis are correctly assigned or the species is an assemblage of different Australopithecus and Homo species. [20]
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).
Determining which species of australopithecine (if any) is ancestral to the genus Homo is a question that is a top priority for many paleoanthropologists, but one that will likely elude any conclusive answers for years to come. Nearly every possible species has been suggested as a likely candidate, but none are overwhelmingly convincing.
These are proposed species names for fossils from about 1.9–1.6 Ma, whose relation to Homo habilis is not yet clear. Homo rudolfensis refers to a single, incomplete skull from Kenya. Scientists have suggested that this was a specimen of Homo habilis, but this has not been confirmed. [64] Homo georgicus, from Georgia, may be an intermediate ...
It was also suggested that A. sediba, instead of H. habilis or H. rudolfensis, was the direct ancestor of H. ergaster/H. erectus (the earliest uncontested member of the genus Homo), primarily because the Malapa hominins were dated to 1.98 million years ago in 2011, which at the time predated the earliest representative of H. ergaster/H. erectus ...
Homo habilis: 1949 Swartkrans, South Africa: Ditsong National Museum of Natural History OH 24 (Twiggy) [39] 1.80 Homo habilis: 1968 Tanzania: Peter Nzube OH 8 [40] 1.80 Homo habilis: 1960 Olduvai, Tanzania: D2700 (Dmanisi Skull 3) 1.81±0.40 [41] Homo erectus: 2001 Dmanisi, Georgia: David Lordkipanidze and Abesalom Vekua D3444 (Dmanisi Skull 4 ...
Neanderthal (Homo neanderthalensis): A sibling human species. Java Man (Homo erectus): Discovered by Eugene Dubois in 1891 in Indonesia. Originally named Pithecanthropus erectus. Piltdown Man: A set of bones found in 1912 thought to be the "missing link" between ape and man. Eventually revealed to be a hoax.
Progressing along the human ancestral timeline, brain size continues to steadily increase (see Homininae) when moving into the era of Homo. For example, Homo habilis, living 2.4 million to 1.4 million years ago and argued to be the first Homo species based on a host of characteristics, had a cranial capacity of around 600 cm 3. [57]