Rui Diogo: Department of Anthropology, George Washington University, Washington, DC, USA Josep M. Potau: Department of Anatomy and Embryology, University of Barcelona, Barcelona, Spain Juan F. Pastor, Felix J. dePaz, Eva M. Ferrero: Department of Anatomy, Universidad de Valladolid, Valladolid, Spain Gaƫlle Bello: Department of Animal Biology, University of Barcelona, Barcelona, Spain Mercedex Barbosa: Department of Anatomy, Universidad de Valladolid, Valladolid, Spain Bernard A. Wood: Department of Anthropology, George Washington University, Washington, DC, USA