CRANIAL ONTOGENY IN THE PUMA LINEAGE, PUMA CONCOLOR, HERPAILURUS YAGOUAROUNDI AND ACINONYX JUBATUS (CARNIVORA: FELIDAE): A THREE DIMENSIONAL GEOMETRIC MORPHOMETRIC APPROACH

SEGURA, V.; FRANCISCO J. PREVOSTI; GUILLERMO CASSINI

ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY

WILEY-BLACKWELL PUBLISHING, INC

Lugar: Londres; Año: 2013 vol. 169 p. 235 - 250

0024-4082

The Puma lineage is a monophyletic group that includes three living species: Puma concolor, Herpailurusyagouaroundi, and Acinonyx jubatus. It has been analysed from ecological and taxonomic perspectives, but theircranial ontogeny has been poorly studied. In this study, we assessed the cranial shape and size variation throughthree-dimensional geometric morphometric techniques, and explored the acquisition of definitive shape and size inrelation to key life-history events. Each species occupied different locations in the shape morphospace: A. jubatusand P. concolor showed shorter and wider skulls, with more expanded zygomatic arches, than H. yagouaroundi,which presented the most divergent pattern of change. Ontogeny was more similar between P. concolor andA. jubatus than between the closely related P. concolor and H. yagouaroundi. The evolution of ontogenetic changein the lineage seems to be more influenced by size. Changes detected between juvenile and adult skulls enhancedpredatory skills, coincident with the change from a diet of milk to a carnivorous diet. Change patterns suggest thatthe skull is not morphologically conservative in the lineage, in contrast with other carnivores such as canids andhyaenids. The enlargement of the rostrum observed in some canids and the reinforcement of the bite mechanismof hyaenids were not detected in this group.