Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12136/484
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Title: A geometric morphometric analysis of hominin upper second and third molars, with particular emphasis on European Pleistocene populations
Authors: Gómez-Robles, Aida
Bermúdez de Castro, José María
Martinón-Torres, María
Prado-Simón, Leyre
Arsuaga, Juan Luis
Keywords: Dental anthropology;Dental reduction;Sima de los Huesos;Procrustes-based methods;Allometry
Issue Date: Sep-2012
Publisher: Elsevier
Citation: Journal of Human Evolution, 2012, 63 (3), 512-526
Abstract: The study of dental morphology by means of geometric morphometric methods allows for a detailed and quantitative comparison of hominin species that is useful for taxonomic assignment and phylogenetic reconstruction. Upper second and third molars have been studied in a comprehensive sample of Plio- and Pleistocene hominins from African, Asian and European sites in order to complete our analysis of the upper postcanine dentition. Intraspecific variation in these two molars is high, but some interspecific trends can be identified. Both molars exhibit a strong reduction of the distal cusps in recent hominin species, namely European Homo heidelbergensis, Homo neanderthalensis and Homo sapiens, but this reduction shows specific patterns and proportions in the three groups. Second molars tend to show four well developed cusps in earlier hominin species and their morphology is only marginally affected by allometric effects. Third molars can be incipiently reduced in earlier species and they evince a significant allometric component, identified both inter- and intraspecifically. European Middle Pleistocene fossils from Sima de los Huesos (SH) show a very strong reduction of these two molars, even more marked than the reduction observed in Neanderthals and in modern human populations. The highly derived shape of SH molars points to an early acquisition of typical Neanderthal dental traits by pre-Neanderthal populations and to a deviation of this population from mean morphologies of other European Middle Pleistocene groups.
URI: http://hdl.handle.net/20.500.12136/484
ISSN: 0047-2484
1095-8606
DOI: 10.1016/j.jhevol.2012.06.002
metadata.dc.relation.publisherversion: https://doi.org/10.1016/j.jhevol.2012.06.002
Type: Article
Appears in Collections:Paleobiología



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