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6th Iberian Primatological Congress

Authors:
Miquel Llorente at University of Girona
Miquel Llorente
José Miguel Carretero at University of Burgos
José Miguel Carretero
Susana Costa
Susana Costa
Susana Costa
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The Human Torso: Variation in Relation to Sexual Dimorphism, Ancestry and Allometry
Article
  • Jan 2018
Thorax and pelvis covariation is important for understanding evolutionary variability in human body shape. Although previous analyses have addressed these issues by investigating isolated trunk bones, no research has included anatomically connected trunk bones. Here, we assessed how the thorax and pelvis co-vary in Homo sapiens, considering sex, ancestry and allometry, by addressing two hypotheses: H1) similar and correlated lower thorax and upper pelvis widths account for trunk variation; H2) males have wider thoraces than pelves and females show the opposite. We further explored how allometry interacts with such covariation patterns. We measured and analysed 1030 (semi)landmarks on 50 CT-scanned human trunks (25 sub- Saharans; 25 Mediterraneans) using 3D morphometrics (Form Space PCA, PLS). PC1 suggests that allometry drives similar and correlated thoraco-pelvic widths (supporting H1) at population level (PLS1 r = 0.66; p < 0.05), with larger and narrower trunks in Mediterraneans than in sub- Saharans. PC2 polarises males and females, with wider ribcages and relatively narrower pelves in males (PLS1 r = 0.63; p < 0.05, supporting H2). Population differences, along with allometric factors, show most similar body widths at ribs 9–10 and the upper pelvis, with sexual dimorphism modulating these patterns. Our preliminary study shows that the human body reveals a more complex spectrum of shapes than classically described. Acknowledgments: CGL 2015-63648-P, Fundación Grupo ERESA.
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A Survey of Chimpanzees Gizéh Rangel de Lázaro a,b , Simon Neubauer c , Philipp Gunz c , Emiliano Bruner d a Universitat Rovira i Virgili, Tarragona, Spain; b Institut Català de Paleoecologia Humana i Evolució Social
  • Computed Tomography
  • Diploic Channels
Computed Tomography and Diploic Channels: A Survey of Chimpanzees Gizéh Rangel de Lázaro a,b, Simon Neubauer c, Philipp Gunz c, Emiliano Bruner d a Universitat Rovira i Virgili, Tarragona, Spain; b Institut Català de Paleoecologia Humana i Evolució Social, Tarragona, Spain; c Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany; d Centro Nacional de Investigación sobre la Evolución Humana, Burgos, Spain E-Mail: emiliano.bruner@cenieh.es; gizeh.rangel@urv.cat