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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/35487

Title: On the Relationships of Postcanine Tooth Size with Dietary Quality and Brain Volume in Primates: Implications for Hominin Evolution
Authors: Jiménez-Arenas, Juan Manuel
Pérez-Claros, Juan Antonio
Aledo, Juan Carlos
Palmqvist Barrena, Carlos Paul
Issue Date: 2014
Abstract: Brain volume and cheek-tooth size have traditionally been considered as two traits that show opposite evolutionary trends during the evolution of Homo. As a result, differences in encephalization and molarization among hominins tend to be interpreted in paleobiological grounds, because both traits were presumably linked to the dietary quality of extinct species. Here we show that there is an essential difference between the genus Homo and the living primate species, because postcanine tooth size and brain volume are related to negative allometry in primates and show an inverse relationship in Homo. However, when size effects are removed, the negative relationship between encephalization and molarization holds only for platyrrhines and the genus Homo. In addition, there is no general trend for the relationship between postcanine tooth size and dietary quality among the living primates. If size and phylogeny effects are both removed, this relationship vanishes in many taxonomic groups. As a result, the suggestion that the presence of well-developed postcanine teeth in extinct hominins should be indicative of a poor-quality diet cannot be generalized to all extant and extinct primates.
Sponsorship: This research has been funded by the Spanish Ministry of Science and Innovation (Projects CGL2010-18124, CGL2011-30334, and HAR2008-04577) and supported by the Department of Economy, Innovation and Science, Junta de Andalucía, Spain (Project P11-HUM-7248 and Research Groups HUM-607 and RNM-146).
Publisher: Hindawi Publishing Corporation
Keywords: Homo
Primates
Postcanine tooth
Diet
URI: http://hdl.handle.net/10481/35487
ISSN: 2314-6133
2314-6141
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Jiménez-Arenas, J.M.; et al. On the Relationships of Postcanine Tooth Size with Dietary Quality and Brain Volume in Primates: Implications for Hominin Evolution. BioMed Research International, 2014: 406507 (2014). [http://hdl.handle.net/10481/35487]
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