1. Department of Early Prehistory and Quaternary Ecology, Schloss Hohentübingen, University of Tübingen, 72070 Tübingen, Germany.
2. Senckenberg Centre for Human Evolution and Paleoenvironment, Schloss Hohentübingen, University of Tübingen, 72070 Tübingen, Germany.
3. F.R.S.-FNRS, TraceoLab, University of Liège, 4000 Liège, Belgium.