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10,000 years of mandibular evolution in southern South America: Implications for morphological diversification

dc.creatorMenendez, Lumila Paula
dc.creatorSardi, Marina Laura
dc.creatorScheifler, Nahuel Alberto
dc.creatorGonzalez, Mariela Edith
dc.creatorMessineo, Pablo Geronimo
dc.creatorPolitis, Gustavo Gabriel
dc.date2019
dc.date.accessioned2022-04-15T01:55:43Z
dc.date.available2022-04-15T01:55:43Z
dc.identifierhttp://hdl.handle.net/11336/140015
dc.identifier10,000 years of mandibular evolution in southern South America: Implications for morphological diversification; 88th Annual Meeting of the American Association of Physical Anthropologists; Cleveland; Estados Unidos; 2019; 164-164
dc.identifier0002-9483
dc.identifierCONICET Digital
dc.identifierCONICET
dc.identifier.urihttp://suquia.ffyh.unc.edu.ar/handle/11336/140015
dc.descriptionSouth America (SA) was the last continent to be colonized by modern humans. One of the relevant research questions that still remain to be addressed is how SA populations became differentiated. Previous studies that pointed to tackle this question analyzed molecular, cranial, dental, and postcranial variation. However, there are no studies so far analyzing mandibular variation with a wide temporal-spatial coverage in SA, what might be biasing current interpretations. Mandibular variation in modern humans has been described by a reduction pattern across time, which was interpreted either as a result of evolutionary history and/or the differential impact of diverse subsistence strategies. The aim of this study is to evaluate morphometric changes in southern SA mandibles for discussing which evolutionary processes were involved during human diversification. For this, a total of 28 3D landmarks were registered in a sample that includes 6 early-middle Holocene specimens (EMH) from the Argentinean Pampas and 10 late Holocene populations (LH) from SA (N~200). Results of the PCA and CVA showed that the EMH specimens are primarily differentiated from the LH ones, and secondarily associated to the southern samples. Shape and size variation shows that more robust mandibles with a largerbody and ramus characterize EMH. Additionally, the spatial regressions performed show that diet contributes to explain 40% of mandible shape variation. Overall, such patterns could be interpreted either as the result of population diversification driven by selection and/or genetic drift. A discussion considering previous studies in the area and alternative explanations will be presented.
dc.descriptionFil: Menendez, Lumila Paula. Konrad Lorenz Institute; Austria. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.descriptionFil: Sardi, Marina Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico de Antropología; Argentina
dc.descriptionFil: Scheifler, Nahuel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano. Universidad Nacional del Centro de la Provincia de Buenos Aires. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano; Argentina
dc.descriptionFil: Gonzalez, Mariela Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano. Universidad Nacional del Centro de la Provincia de Buenos Aires. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano; Argentina
dc.descriptionFil: Messineo, Pablo Geronimo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano. Universidad Nacional del Centro de la Provincia de Buenos Aires. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano; Argentina
dc.descriptionFil: Politis, Gustavo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano. Universidad Nacional del Centro de la Provincia de Buenos Aires. Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano; Argentina
dc.description88th Annual Meeting of the American Association of Physical Anthropologists
dc.descriptionCleveland
dc.descriptionEstados Unidos
dc.descriptionAmerican Association of Physical Anthropologists
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dc.formatapplication/pdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherAmerican Association of Physical Anthropologists
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1002/ajpa.23802
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/10.1002/ajpa.23802
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subjectMorphology
dc.subjectAmericas
dc.subjectGeometric morphometrics
dc.subjecthttps://purl.org/becyt/ford/6.1
dc.subjecthttps://purl.org/becyt/ford/6
dc.title10,000 years of mandibular evolution in southern South America: Implications for morphological diversification
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.typeinfo:eu-repo/semantics/conferenceObject
dc.typeinfo:ar-repo/semantics/documento de conferencia
dc.typeReunión
dc.typeJournal
dc.coverageInternacional


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