Early and Middle Pleistocene hominins from Atapuerca (Spain) show differences in dental developmental patterns

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Modesto Mata, Mario and García González, Rebeca and Quintino, Yuliet and García Campos, Cecilia and Martínez de Pinillos, Marina and Martín-Francés, Laura and Martinón Torres, María and Heuzé, Yann and Carbonell i Roura, Eudald and Arsuaga, Juan Luis and Dean, M. Christopher and Bermúdez de Castro, José María (2022) Early and Middle Pleistocene hominins from Atapuerca (Spain) show differences in dental developmental patterns. American Journal of Biological Anthropology, 178 (2). pp. 273-285. ISSN 2692-7691

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Official URL: https://doi.org/10.1002/ajpa.24487



Abstract

The Bayesian statistical approach considers teeth as forming a developmental module, as opposed to a tooth-by-tooth analysis. This approach has been employed to analyze Upper Pleistocene hominins, including Neandertals and some anatomically modern humans, but never earlier populations. Here, we show its application on five hominins from the TD6.2 level of the Gran Dolina site (Homo antecessor, Early Pleistocene) and the Sima de los Huesos site (Middle Pleistocene) of the Sierra de Atapuerca (Burgos, northern Spain). Our results show an advanced development of the third molars in both populations with respect to modern Homo sapiens. In addition, the Sima de los Huesos hominins differ from H. sapiens and H. antecessor in the relatively advanced development of their second molar. The relative mineralization of I1/M1 in H. antecessor appears to be similar to that of modern humans, as opposed to that of Neandertals, which appear to be unique. These observations, combined with reduced enamel formation times and the advanced development of the third molars, appear to indicate a shorter ontogenetic period in the hominins from Gran Dolina and Sima de los Huesos in comparison to modern human average.


Item Type:Article
Uncontrolled Keywords:Atapuerca, Bayesian, dental development, hominin, Pleistocene
Subjects:Sciences > Geology > Paleontology
ID Code:74640
Deposited On:16 Sep 2022 14:18
Last Modified:19 Sep 2022 07:16

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