Sexual dimorphism of the enamel and dentine dimensions of the permanent canines of the Middle Pleistocene hominins from Sima de los Huesos (Burgos, Spain)

Downloads

Downloads per month over past year

63533

Impacto

Downloads

Downloads per month over past year

García Campos, Cecilia and Modesto Mata, Mario and Martinón Torres, María and Martínez de Pinillos, Marina and Martín-Francés, Laura and Arsuaga, Juan Luis and Bermúdez de Castro, José María (2020) Sexual dimorphism of the enamel and dentine dimensions of the permanent canines of the Middle Pleistocene hominins from Sima de los Huesos (Burgos, Spain). Journal of Human Evolution, 144 (102793). ISSN 0047-2484

[thumbnail of Sexual dimorphism of the enamel and dentine dimensions of the permanent canines of the.pdf] PDF
Restringido a Repository staff only

3MB

Official URL: https://doi.org/10.1016/j.jhevol.2020.102793



Abstract

Sexual dimorphism is an important component of the total variation seen in populations and plays a key role in taxonomic debates. In this study, microtomographic (microcomputed tomography) techniques were applied to a sample of hominin teeth from the Sima de los Huesos site (Spain). Dental tissue proportions of the permanent canines were assessed to characterize the pattern and degree of sexual dimorphism within this population. In addition, the possible similarities and differences with the Homo neanderthalensis remains from Krapina (Croatia) and with a recent modern human sample were evaluated. A combination of classical statistical approaches with more novel techniques allowed us not only to ratify the sex allocation of the individuals previously assigned in the literature but also to estimate the sex of the youngest individuals, which were not assessed in previous studies. Likewise, the sexes of certain extensively worn canines and isolated pieces were estimated. As a result, the sex ratio observed in our dental sample from the Sima de los Huesos population is 5:9 (Nm:Nf). In general terms, both Sima de los Huesos and Krapina dental samples have a degree of sexual dimorphism in their permanent canine tissue proportions that does not surpass that of modern humans. The marked dimorphic root volume of Sima de los Huesos mandibular canines is the exception, which surpasses the modern human mean, although it falls within the 95% confidence interval. Therefore, our results do not support that dental tissue proportions of the European Middle Pleistocene populations were more dimorphic than in modern humans. However, the differences in canine tissue proportions are great enough to allow sex estimation with a high degree of confidence.


Item Type:Article
Uncontrolled Keywords:Sexual dimorphism, Canines, Dentine, Enamel, Sima de los Huesos
Subjects:Sciences > Geology > Paleontology
ID Code:63533
Deposited On:13 Jan 2021 16:25
Last Modified:14 Jan 2021 08:10

Origin of downloads

Repository Staff Only: item control page