how did the homosapiens human appear during the Pleistocene era
Answers
Explanation:
The emergence of Homo sapiens
The relationships among Australopithecus, K. platyops, Paranthropus, and the direct ancestors of Homo are unknown. Because of its early date and geographic location, A. anamensis may be the common ancestor of A. afarensis, A. garhi, K. platyops, and perhaps the Laetoli Pliocene hominins of eastern Africa, A. bahrelghazali of central Africa, and A. africanus of southern Africa. A. afarensis in turn may be ancestral to P. aethiopicus, which begat P. boisei in eastern Africa and P. robustus in southern Africa.
fossil sites of recent Homo species
fossil sites of recent Homo species
Fossils of Homo have been found in several locations in Africa and Eurasia.
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Factors indicating H. rudolfensis as ancestral to later species of Homo are its absolute brain size, large body, and lower limb morphology. These features clearly foreshadow younger species of Homo in Africa and Eurasia. However, a mandible discovered in the Ledi-Geraru area of the Awash River valley in 2013 may point toward a different ancestor—one that clearly belongs to the genus Homo. The mandible provides evidence that dental features associated with later Homo (such as smaller teeth and a much-reduced chin) appeared as early as 2.8 million years ago, well in advance of the advent of H. rudolfensis. While some paleontologists have been quick to associate the specimen with H. habilis, others are considering the possibility that it belongs to a new species of Homo.
Ledi-Geraru jawbone
Ledi-Geraru jawbone
American anthropologist Brian A. Villmoare holding a replica of the Ledi-Geraru jawbone. The actual mandible, found in Ethiopia and dated to 2.8 million–2.75 million years ago, is the oldest fossil associated with the genus Homo.
Aaron Mayes/UNLV Photo Services
Our ancestry becomes no clearer as the candidates are narrowed to Homo species exclusively. Among paleoanthropologists who accept it as a species distinct from H. erectus, H. ergaster is most often proposed as the ancestor of Homo species of the Pleistocene Epoch. H. heidelbergensis may have arisen from H. ergaster, H. erectus, or H. antecessor, and any or none of them could have been ancestors of H. neanderthalensis and H. sapiens. Neanderthal populations, particularly as represented by specimens from western Europe, probably were not ancestral to modern humans.