Browsing by Autor "Markus Bastir"

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    Eco‐geographic and sexual variation of the ribcage in <i>Homo sapiens</i>
    (Wiley, 2024) José M. López‐Rey; Manuel Domingo D’Angelo del Campo; Verónica Seldes; Daniel García‐Martínez; Markus Bastir
    Up to now, Allen and Bergmann's rules have been studied in modern humans by analyzing differences in limb length, height, or body mass. However, there are no publications studying the effects of latitude in the 3D configuration of the ribcage. To assess this issue, we digitally reconstructed the ribcages of a balanced sample of 109 adult individuals of global distribution. Shape and size of the ribcage was quantified using geometric morphometrics. Our results show that the ribcage belonging to tropical individuals is smaller and slenderer compared to others living in higher latitudes, which is in line with Allen and Bergmann's rules and suggests an allometric relationship between size and shape. Although sexual dimorphism was observed in the whole sample, significant differences were only found in tropical populations. Our proposal is that, apart from potential sexual selection, avoiding heat loss might be the limiting factor for sexual dimorphism in cold-adapted populations.
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    Eco‐Geographical Variation in Craniofacial Size and Shape, With Emphasis in Cold Adaptation, Through a 3D Approach
    (2025) Manuel Domingo D’Angelo del Campo; Gülkan Gökdoğan Aktepe; Markus Bastir; Daniel García‐Martínez
    Notable craniofacial similarities associated with extreme cold adaptation, including increased prognathism, prominent glabellar and supraciliary regions, lateral zygomatic expansion, enlarged nasal cavity and orbits, and elongated, flattened braincase, despite genetic differences. However, the Norse sample presents a deviation from expected patterns, exhibiting smaller sizes despite inhabiting a cold region.