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Title: A two-dimensional micro-tomographic study of taurodontism in the Atapuerca-Sima de los Huesos lower molars
Authors: McLean, Catherine
Martinón-Torres, María
Martín-Francés, Laura
Arsuaga, Juan Luis
Bermúdez de Castro, José María
Issue Date: 2018
Publisher: American Association of Physical Anthropologists
Citation: 87th Annual Meeting of the American Association of Physical Anthropologists, 2018, p. 173
Abstract: The morphological study of the Middle Pleistocene hominins discovered at Sima de los Huesos (Sierra de Atapuerca, Spain) suggest that they are closely related to Neanderthals. Although the Sima de los Huesos (SH) dentition has been extensively studied, no in depth analysis of taurodontism has been done to date. This study aims to establish protocols to measure taurodontism on micro-CT images in order to characterize the SH mandibular molars and explore their affinities with Neanderthals and modern Homo sapiens. A total of 60 first and second permanent mandibular molars were selected from three populations including modern Homo sapiens, Neanderthals, and the SH hominins. We established a plane for the maximum measurement of the pulp cavity and used the measurements of Taurodont Index, Height of Bifurcation Index, and total length of root to characterize and compare the molars using statistical analyses. All of the SH molars analyzed in this study expressed some degree of taurodontism. For most of the measurements compared, there were no significant differences between SH and Neanderthal molars, and significant differences were found between Homo sapiens and the other two groups. Overall, the SH molar roots showed more similarities to Neanderthals than to Homo sapiens in this study, which is consistent with previous analyses of the SH morphology. The similarities regarding SH and Neanderthals further supports the view that the SH hominins have a close phylogenetic relationship to Neanderthals and that Neanderthal morphology has deep roots in the European Middle Pleistocene.
Type: Presentation
Appears in Collections:Congresos, encuentros científicos y estancias de investigación

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