M Susana Bargo Editor & Author

Sergio F. Vizcaíno is Professor of Vertebrate Zoology at the Universidad Nacional de La Plata, Argentina and a researcher of the Consejo Nacional de Investigaciones Científicas y Técnicas working at the Museo de La Plata, Argentina. His research focuses on the paleobiology of South American fossil vertebrates, mostly mammals, and he has authored approximately 100 research papers and book chapters and edited one book and several special volumes. Professor Vizcaíno has participated in numerous fieldwork seasons in Argentina and Antarctica. He was the President of the Asociación Paleontológica Argentina (APA) and in 1996 and 2008 he won awards for his publications in Ameghiniana, the journal of the APA. Richard F. Kay is Professor of Evolutionary Anthropology and Earth and Ocean Sciences at Duke University, North Carolina, where he has worked since 1973. He has edited six books and authored more than 200 research papers on primate paleontology, functional anatomy, adaptations and phylogenetics. Professor Kay has conducted paleontological field research in seven South American countries since 1982 and is an elected fellow of the American Association for the Advancement of Science. M. Susana Bargo is a vertebrate paleontologist at the Division Paleontologia Vertebrados of the Museo de La Plata, Argentina and a researcher for the Comisión de Investigaciones Científicas de la Provincia de Buenos Aires. Her research focuses on the paleobiology of South American fossil mammals. Dr Bargo has authored about fifty scientific papers and book chapters, and was the editor in charge of vertebrates for Ameghiniana, winning an award in 2008 for a publication in that journal. She has participated in numerous field seasons in Patagonia, Argentina.