2 février 2015

Nouvelle espèce humaine découverte?

Un nouveau cousin vient possiblement d'être identifié en Chine:

Archaeologists have uncovered teeth in China that don’t appear to belong to any known species of Homo—not quite modern humans, not quite Neanderthals. The findings, published in the American Journal of Physical Anthropology, suggests that the teeth may belong to hybrids of known populations or even to a whole new species of human ancestors we never knew about.

(...) In 1976, hominin dental samples—nine teeth from four individuals, BBC reports—were recovered from the early Late Pleistocene site of Xujiayao in northern China. Now, an international team from the Chinese Academy of Sciences and Spain’s National Research Center on Human Evolution (CENIEH)  have re-analyzed the fossils, measuring the size and shape of various dental features, from the roots to the crown to the grooves between the cusps. 

"Teeth are like 'landscapes in miniature,'" study author María Martinón-Torres of CENIEH tells the BBC. "Each of those slopes, grooves, valleys define a pattern or combination of features that can be distinctive of a population."

They found a mix of primitive and derived features: They’re different from archaic and recent modern humans, and they have some features that are common (but not exclusive) to the Neanderthal lineage. Furthermore, the fossils have retained some primitive structures that have previously been found in East Asian hominins from the Early and Middle Pleistocene, despite how they’re geologically younger. 

These findings indicate the existence of a population in China that’s contemporary with Homo sapiens and Neanderthals, but of “unclear taxonomic status.” Perhaps these features were the result of interbreeding between different Homo species, or perhaps there’s a primitive hominin lineage that survived late into the Late Pleistocene in China. 

1 commentaire:

fylouz a dit...

Bon, ça n'a rien à voir, et en plus ça parle plus de la Corée que de la Chine, mais voilà donc...



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