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Virtual reconstruction of the Early Pleistocene mandible ATD6-96 from Gran Dolina-TD6-2 (Sierra De Atapuerca, Spain)

Bermúdez de Castro, JM; Martín-Francés, L; Modesto-Mata, M; Martínez de Pinillos, M; Martinón-Torres, M; García-Campos, C; Carretero, JM; (2016) Virtual reconstruction of the Early Pleistocene mandible ATD6-96 from Gran Dolina-TD6-2 (Sierra De Atapuerca, Spain). American Journal of Physical Anthropology , 159 (4) pp. 729-736. 10.1002/ajpa.22919. Green open access

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Abstract

OBJECTIVES: In this report, we present a further study of the late Early Pleistocene ATD6-96 human mandible, recovered from the TD6-2 level of the Gran Dolina cave site (Sierra de Atapuerca, northern Spain) and attributed to Homo antecessor. METHODS: ATD6-96 consists of a left half of a gracile mandible of an adult individual with the premolars and molars in place that is broken at the level of the lateral incisor-canine septum. The present analysis is based on a virtual reconstruction of the whole mandible by means of computed tomography (CT). We have reconstructed the symphysis using information from a modern human sample, as well as from a wide sample composed of several Homo specimens. RESULTS: This research has allowed us to record new variables with taxonomic and phylogenetic interest. We have estimated the length/width index of the alveolar arcade, as well as the percentage of the arcade length with regard to the total length. The latter confirms that ATD6-96 shares with all African and Asian Homo species a primitive structural pattern, as it was established in previous studies. In constrast, the length/width index of the alveolar arcade in the H. antecessor specimen is close to the mean values of Neandertals and the Atapuerca-Sima de los Huesos hominins. CONCLUSIONS: H. antecessor is derived regarding the shape of the mandibular alveolar arcade within the genus Homo and points to an early divergence from contemporaneous African populations. Our results also ratify the affinities of H. antecessor with Neanderthals, although the precise relationship with this lineage needs further research.

Type: Article
Title: Virtual reconstruction of the Early Pleistocene mandible ATD6-96 from Gran Dolina-TD6-2 (Sierra De Atapuerca, Spain)
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/ajpa.22919
Publisher version: http://dx.doi.org/10.1002/ajpa.22919
Language: English
Additional information: Copyright © 2015 Wiley Periodicals, Inc. This is the peer reviewed version of the following article: [Bermúdez de Castro, J. M., Martín-Francés, L., Modesto-Mata, M., Martínez de Pinillos, M., Martinón-Torres, M., García-Campos, C. and Carretero, J. M. (2016), Virtual reconstruction of the Early Pleistocene mandible ATD6-96 from Gran Dolina-TD6-2 (Sierra De Atapuerca, Spain). Am. J. Phys. Anthropol., 159: 729–736. doi: 10.1002/ajpa.22919], which has been published in final form at http://dx.doi.org/10.1002/ajpa.22919. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Keywords: Homo antecessor, Sierra de Atapuerca, mandible, virtual reconstruction
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL SLASH
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of SandHS > Dept of Anthropology
URI: http://discovery.ucl.ac.uk/id/eprint/1479509
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