Getting a grip on the evolution of grasping in musteloid carnivorans: a three‐dimensional analysis of forelimb shape

Journal of Evolutionary Biology - Tập 26 Số 7 - Trang 1521-1535 - 2013
Anne‐Claire Fabre1,2,3, Raphaël Cornette4, Graham J. Slater5, Christine Argot1, Stéphane Peigné1, Anjali Goswami2, Emmanuelle Pouydebat6
1Centre de recherche sur la paléobiodiversité et les paléoenvironnements – UMR 7207 Centre National de Recherche Scientifique Muséum National d'Histoire Naturelle Univ Paris 06 Paris France
2Department of Genetics, Evolution, and Environment and Department of Earth Sciences, University College London, London, UK
3Univ Paris Diderot, Paris, France
4Origine Structure et Evolution de la Biodiversité ‐ UMR 7205 Centre National de Recherche Scientifique Muséum National d'Histoire Naturelle Paris France
5Department of Paleobiology, National Museum of Natural History, The Smithsonian Institution [NHB MRC 121], Washington, DC, USA
6Département d'Ecologie et de Gestion de la Biodiversité UMR 7179 Centre National de Recherche Scientifique Muséum National d'Histoire Naturelle Paris Cedex 5 France

Tóm tắt

AbstractThe ability to grasp and manipulate is often considered a hallmark of hominins and associated with the evolution of their bipedal locomotion and tool use. Yet, many other mammals use their forelimbs to grasp and manipulate objects. Previous investigations have suggested that grasping may be derived from digging behaviour, arboreal locomotion or hunting behaviour. Here, we test the arboreal origin of grasping and investigate whether an arboreal lifestyle could confer a greater grasping ability in musteloid carnivorans. Moreover, we investigate the morphological adaptations related to grasping and the differences between arboreal species with different grasping abilities. We predict that if grasping is derived from an arboreal lifestyle, then the anatomical specializations of the forelimb for arboreality must be similar to those involved in grasping. We further predict that arboreal species with a well‐developed manipulation ability will have articulations that facilitate radio‐ulnar rotation. We use ancestral character state reconstructions of lifestyle and grasping ability to understand the evolution of both traits. Finally, we use a surface sliding semi‐landmark approach capable of quantifying the articulations in their full complexity. Our results largely confirm our predictions, demonstrating that musteloids with greater grasping skills differ markedly from others in the shape of their forelimb bones. These analyses further suggest that the evolution of an arboreal lifestyle likely preceded the development of enhanced grasping ability.

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Journal of Evolutionary Biology

Tập 26 Số 7

1521-1535

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