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Accueil du site > Séminaires, conférences et RS > Réunions Scientifiques

« Why do primates have such diversity of cranial forms ? Biomechanics and the role of random genetic drift in Anthropoids »

Mardi 14 novembre 2017, 13h30 (Salle Vildé, MH)

par Daujeard Camille - publié le

« Why do primates have such diversity of cranial forms ? Biomechanics and the role of random genetic drift in Anthropoids » par Miguel Prôa (Primatologue, Université de Coimbra, Portugal)

Primate cranial form is widely variable among primate groups, while being constrained by their close phylogenetic relationships. Biomechanically, form reflects function, which in turn is linked to adaptation. Evolutionary, form is driven by processes such as genetic drift and natural selection. I will present two sets of analyses on the cranium, one aiming at linking masticatory function to dietary adaptation, the other at testing the relative contribution of random genetic drift in producing the current diversity of cranial forms in Anthropoids. Biomechanical results show that linking masticatory function to diet is not always straightforward. Evolutionary results show that the null hypothesis of diversification by random genetic drift alone is rejected only in some groups, which means it might have been more important than it is often presumed. The extension of the sample size to include fossils would be a welcomed addition to further the understanding of primate cranial form evolution.