1. Department of Zoology; Institute of Zoology, Poznań University of Life Sciences; Poznań 60-625 Poland
2. Department of Human Biology; Wrocław University; Wrocław 50-138 Poland
3. Equipe de Paleontologie Humaine, UMR 7194 du CNRS, Departement de Prehistoire; Museum National d'Histoire Naturelle; Paris France
4. Department of African Zoology; Royal Museum for Central Africa; Tervuren B-3080 Belgium
5. Department of Human Evolutionary Biology, Institute of Anthropology; Adam Mickiewicz University in Poznań; Poznań 61-614 Poland