Sergio F. Vizca�no is Professor of Vertebrate Zoology at the Universidad Nacional de La Plata, Argentina and a researcher of the Consejo Nacional de Investigaciones Cient�ficas y T�cnicas 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 Vizca�no has participated in numerous fieldwork seasons in Argentina and Antarctica. He was the President of the Asociaci�n Paleontol�gica Argentina (APA) and in 1996 and 2008 he won awards for his publications in Ameghiniana,… the journal of the APA.