a Hominid Paleobiology Doctoral Program, CASHP, Department of Anthropology, The George Washington University, 2110 G Street NW, Washington, DC 20052, USA b Department of Vertebrate Paleontology, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024, USA c Center for the Study of Human Origins, Department of Anthropology, New York University, 25 Waverly Place, ...