Enamel hypoplasias and physiological stress in the Sima de los Huesos Middle Pleistocene hominins

American Journal of Physical Anthropology
E CunhaS Sarmiento

Abstract

This study presents an analysis of linear enamel hypoplasias (LEH) and plane-form defects (PFD) in the hominine dental sample from the Sima de los Huesos (SH) Middle Pleistocene site in Atapuerca (Spain). The SH sample comprises 475 teeth, 467 permanent and 8 deciduous, belonging to a minimum of 28 individuals. The method for recording PFD and LEH is discussed, as well as the definition of LEH. The prevalence of LEH and PFD in SH permanent dentition (unilateral total count) is 4.6% (13/280). Only one deciduous tooth (lower dc) showed an enamel disruption. Prevalence by individual ranges from 18.7-30%. The most likely explanation for the relatively low LEH and PFD prevalence in the SH sample suggests that the SH population exhibited a low level of developmental stress. The age at occurrence of LEH and PFD was determined by counting the number of perikymata between each lesion and the cervix of the tooth. Assuming a periodicity of nine days for the incremental lines, the majority of LEH in the SH sample occurred during the third year of life and may be related to the metabolic stress associated with weaning.

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Citations

Dec 14, 2006·Proceedings of the National Academy of Sciences of the United States of America·Antonio RosasJavier Fortea
Nov 29, 2011·Journal of Human Evolution·María Martinón-TorresJuan Luis Arsuaga
Mar 31, 2015·American Journal of Physical Anthropology·Tanya M Smith, Christophe Boesch
Mar 1, 2014·American Journal of Physical Anthropology·Gina McFarlaneBruce Floyd
Dec 11, 2007·American Journal of Physical Anthropology·John KappelmanSevket Sen
Jan 17, 2020·American Journal of Physical Anthropology·Laura Martín-FrancésJosé María Bermúdez de Castro
Oct 26, 2020·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·José María Bermúdez de CastroJuan Luis Arsuaga
Nov 26, 2019·Journal of Human Evolution·María Dolores GarraldaBernard Vandermeersch
Dec 29, 2020·American Journal of Physical Anthropology·Gina McFarlanePatrick Mahoney
Jul 18, 2021·American Journal of Physical Anthropology·Heather J H EdgarCorey S Ragsdale
Aug 5, 2021·American Journal of Physical Anthropology·Gina McFarlanePatrick Mahoney

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