South Amerindian craniofacial morphology: Diversity and implications for Amerindian evolution

Authors

  • Marina L. Sardi,

    Corresponding author
    1. UPR 2147, Dynamique de l'Evolution Humaine, CNRS, 75014 Paris, France
    2. Departamento Científico de Antropología del Museo de La Plata, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, 1900 La Plata, Argentina
    • UPR 2147, CNRS, 44 rue de l'Amiral Mouchez, 75014 Paris, France
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  • Fernando Ramírez Rozzi,

    1. UPR 2147, Dynamique de l'Evolution Humaine, CNRS, 75014 Paris, France
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  • Rolando González-José,

    1. Área de Arqueología y Antropología, Centro Nacional Patagónico, CONICET, U9120ACV Puerto Madryn, Argentina
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  • Héctor M. Pucciarelli

    1. Departamento Científico de Antropología del Museo de La Plata, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, 1900 La Plata, Argentina
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Abstract

The most compelling models concerning the peopling of the Americas consider that modern Amerindians share a common biological pattern, showing affinities with populations of the Asian Northeast. The aim of the present study was to assess the degree of variation of craniofacial morphology of South American Amerindians in a worldwide context. Forty-three linear variables were analyzed on crania derived from American, Asian, Australo-Melanesian, European, South-Saharan African, and Polynesian regions. South America was represented by seven Amerindian samples. In order to understand morphologic diversity among Amerindians of South America, variation was estimated using regions and local populations as units of analysis. Variances and FST values were calculated for each unit, respectively. Both analyses indicated that morphologic variation in Southern Amerindians is extremely high: an FST of 0.01531 was obtained for Southern Amerindians, and values from 0.0371–0.1205 for other world regions. Some aspects linked to the time and mode of the peopling of the Americas and various microevolutionary processes undergone by Amerindians are discussed. Some of the alternatives proposed to explain this high variation include: a greater antiquity of the peopling than what is mostly accepted, a peopling by several highly differentiated waves, an important effect of genetic drift, and gene flow with Paleoamericans. A combination of some of these alternatives explains at least some of the variation. Am J Phys Anthropol 127:, 2005. © 2005 Wiley-Liss, Inc.

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