Postcranial morphology of the middle Pleistocene humans from Sima de los Huesos, Spain.

نویسندگان

  • Juan Luis Arsuaga
  • José-Miguel Carretero
  • Carlos Lorenzo
  • Asier Gómez-Olivencia
  • Adrián Pablos
  • Laura Rodríguez
  • Rebeca García-González
  • Alejandro Bonmatí
  • Rolf M Quam
  • Ana Pantoja-Pérez
  • Ignacio Martínez
  • Arantza Aranburu
  • Ana Gracia-Téllez
  • Eva Poza-Rey
  • Nohemi Sala
  • Nuria García
  • Almudena Alcázar de Velasco
  • Gloria Cuenca-Bescós
  • José María Bermúdez de Castro
  • Eudald Carbonell
چکیده

Current knowledge of the evolution of the postcranial skeleton in the genus Homo is hampered by a geographically and chronologically scattered fossil record. Here we present a complete characterization of the postcranium of the middle Pleistocene paleodeme from the Sima de los Huesos (SH) and its paleobiological implications. The SH hominins show the following: (i) wide bodies, a plesiomorphic character in the genus Homo inherited from their early hominin ancestors; (ii) statures that can be found in modern human middle-latitude populations that first appeared 1.6-1.5 Mya; and (iii) large femoral heads in some individuals, a trait that first appeared during the middle Pleistocene in Africa and Europe. The intrapopulational size variation in SH shows that the level of dimorphism was similar to modern humans (MH), but the SH hominins were less encephalized than Neandertals. SH shares many postcranial anatomical features with Neandertals. Although most of these features appear to be either plesiomorphic retentions or are of uncertain phylogenetic polarity, a few represent Neandertal apomorphies. Nevertheless, the full suite of Neandertal-derived features is not yet present in the SH population. The postcranial evidence is consistent with the hypothesis based on the cranial morphology that the SH hominins are a sister group to the later Neandertals. Comparison of the SH postcranial skeleton to other hominins suggests that the evolution of the postcranium occurred in a mosaic mode, both at a general and at a detailed level.

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عنوان ژورنال:
  • Proceedings of the National Academy of Sciences of the United States of America

دوره 112 37  شماره 

صفحات  -

تاریخ انتشار 2015