Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/112014
Title: Testing dietary hypotheses of East African hominines using buccal dental microwear data
Author: Martínez, Laura Mónica
Estebaranz Sánchez, Ferran
Galbany i Casals, Jordi
Martínez Pérez-Pérez, Alejandro
Keywords: Dieta
Dentició
Primats
Homínids
Diet
Dentition
Primates
Hominids
Issue Date: 2016
Publisher: Public Library of Science (PLoS)
Abstract: Abstract There is much debate on the dietary adaptations of the robust hominin lineages during the Pliocene-Pleistocene transition. It has been argued that the shift from C3 to C4 ecosystems in Africa was the main factor responsible for the robust dental and facial anatomical adaptations of Paranthropus taxa, which might be indicative of the consumption of fibrous, abrasive plant foods in open environments. However, occlusal dental microwear data fail to provide evidence of such dietary adaptations and are not consistent with isotopic evidence that supports greater C4 food intake for the robust clades than for the gracile australopithecines. We provide evidence from buccal dental microwear data that supports softer dietary habits than expected for P. aethiopicus and P. boisei based both on masticatory apomorphies and isotopic analyses. On one hand, striation densities on the buccal enamel surfaces of paranthropines teeth are low, resembling those of H. habilis and clearly differing from those observed on H. ergaster, which display higher scratch densities indicative of the consumption of a wide assortment of highly abrasive foodstuffs. Buccal dental microwear patterns are consistent with those previously described for occlusal enamel surfaces, suggesting that Paranthropus consumed much softer diets than previously presumed and thus calling into question a strict interpretation of isotopic evidence. On the other hand, the significantly high buccal scratch densities observed in the H. ergaster specimens are not consistent with a highly specialized, mostly carnivorous diet; instead, they support the consumption of a wide range of highly abrasive food items.
Note: Reproducció del document publicat a: https://doi.org/10.1371/journal.pone.0165447
It is part of: PLoS One, 2016, vol. 11, num. 11, p. e0165447
Related resource: https://doi.org/10.1371/journal.pone.0165447
URI: http://hdl.handle.net/2445/112014
ISSN: 1932-6203
Appears in Collections:Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)

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