RESEARCH ARTICLE · Venue not supplied by source · 2010

Parietal expansion during later hominin evolution, and the validity of H. heidelbergensis - A quantitative approach

Martin Frieß

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Abstract

Departement Hommes, Natures, Societes, UMR 7206 du CNRS, Paris, France Summary The evolution of the modern cranial shape and globularity is the result of a variety of morphological changes that occurred during the later Pleistocene, parietal expansion being one of them. However, this trend has also been described in Neandertals, which bears the question, when and where this character appears, and what it implies for middle Pleistocene human phylogeny. This study presents a quantitative comparison of parietal shape in various species of Homo based on 3D geometric morphometrics. The results confirm the existence of a shared trend toward parietal expansion found in both H. sapiens and H. neanderthalensis, but absent in H.erectus and H. rhodesiensis. If confirmed by additional samples, this would be consistent with an afro-european last common ancestor of modern humans and Neandertals, though to the exclusion of Petralona and Kabwe.

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