HLD6: New East Asia hominid
Wu et al 2019, 2023 are piercing together
Middle Pleistocene (300,000ya) hominid remains (Fig 1, 2) that remained unnamed. The museum number is HLD6.
Wu et al 2923 report,
“Thus far, detailed morphological description and comparisons of the mandible have not been conducted. Here we present a comprehensive morphological, metric, and geometric morphometric assessment of this mandible and compare it with both adult and immature specimens of Pleistocene hominins and recent modern humans. The weak expression of all these features indicates that this mandible does not possess a true chin. The combination of both archaic and modern human features identified in the HLD 6 mandible is unexpected. With these findings, it is possible that modern human morphologies are present as early as 300 ka and earlier than the emergence of modern humans in East Asia.”
From DiscoverMagazine.com
“The evolution of the chin has long been debated in paleoanthropology circles, but everyone agrees only Homo sapiens have prominent ones.
“Multiple specimens of Homo erectus and related lineages have been unearthed going back more than 1.6 million years.
“The Recent African Origin (RAO) model of human evolution has dominated. According to multiregionalists, when H. erectus left Africa almost 2 million years ago, these early explorers didn’t die out. They fanned out across Eurasia and continued to evolve, eventually becoming regional populations of H. sapiens before other populations of H. sapiens left Africa.
“In the last two years, some researchers have proposed a third model that tries to reconcile the dueling models and the expanding fossil record, acknowledging the complexity of our origin story. At about 300,000 years old, HLD 6 may be evidence of regional continuity, a transitional human that represents the evolution of archaic East Asian H. erectus populations into East Asian AMHs.”
AMH = Anatomically Modern Humans
Phylogenetic analysis
in the Large Reptile Tree (LRT, 2295 taxa) indicates an East Asian origin for the genus Homo (Fig 1) from the gibbon (Hylobates. Fig 3) lineage. In the same analysis, Australopithecus, (Fig 3) the traditional human ancestor, nests instead with apes as a biped by convergence.
References
Wu X et al 2023. Morphological and morphometric analyses of a late Middle Pleistocene hominin mandible from Hualongdong, China, Journal of Human Evolution (2023). DOI: 10.1016/j.jhevol.2023.103411
Wu X et al 2019. Archaic human remains from Hualongdong, China, and Middle Pleistocene human continuity and variation, Proceedings of the National Academy of Sciences (2019). DOI: 10.1073/pnas.1902396116
Publicity for the skull:
phys.org/news/2019-05-middle-pleistocene-human-skull
discovermagazine.com/planet-earth/hualongdong-skull
Source: https://pterosaurheresies.wordpress.com/2023/08/08/hld6-new-east-asia-hominid/
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