López Rey, José M.D'Angelo del Campo, Manuel D.Seldes, VerónicaGarcía Martínez, DanielBastir, Markus2025-02-062025-02-062024López-Rey JM, D'Angelo del Campo MD, Seldes V, García-Martínez D, Bastir M. (2024). Eco-geographic and sexual variation of the ribcage in Homo sapiens. Evolutionary Anthropology, 33, e22040. doi:10.1002/evan.220401060-153810.1002/evan.22040https://hdl.handle.net/20.500.14352/117886Funded by Grant PRE2021-097584 to José M. López-Rey and grant PID2020-115854GB-I00 to MarkusBastir are funded by MCIN/AEI/10.13039/501100011033 of the Spanish Ministry of Science and Innovation and the European Union. The work of DGM is carried out at the R&D Unit Center for Functional Ecology—Science for People and the Planet (CFE), with reference UIDB/04004/2020, financed by FCT/MCTES through national funds (PIDDAC) (DOI 10.54499/UIDB/04004/2020).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.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/journal article1520-6505https://doi.org/10.1002/evan.22040https://onlinelibrary.wiley.com/doi/10.1002/evan.22040open access575.826572Allen and Bergmann's ruleAllometGeometricry morphometricsLatitudeSexual dimorphismThoraxEcología (Biología)Antropología biológicaEvolución2402 Antropología (Física)2410.05 Ecología Humana