1. Biological Sciences Department; University of Cape Town; Rhodes Gift, 7701 Cape Town South Africa
2. Niedersächsisches Landesmuseum Hannover; Willy-Brandt-Allee 5 30169 Hanover Germany
3. Steinmann Institute for Geology; Mineralogy and Palaeontology, University of Bonn, Nussallee 8; 53115 Bonn Germany