1. Unit for Environmental Sciences and Management, North-West University, Potchefstroom 2520, South Africa
2. Muséum d'histoire naturelle, UREC - Herpetology & Ichthyology, C.P. 6434, CH-1211 Genève 6, Switzerland
3. Department of Ecology and Evolution, Université de Lausanne, Quartier UNIL-Sorge Bâtiment Biophore, CH-1015 Lausanne, Switzerland
4. Port Elizabeth Museum (Bayworld), P.O. Box 13147, Humewood, Gqeberha 6013, South Africa
5. Museum für Naturkunde – Leibnitz Institute for Evolution and Biodiversity Science, Invalidenstr. 43, D-10115 Berlin, Germany