1. Humboldt-Universität zu Berlin, Inst. Biologie, Berlin, Germany
2. Current address: Museum für Naturkunde, Berlin, Germany
3. Universität Konstanz, Fak. Biologie, Konstanz, Germany
4. Current address: F. Hoffmann-La Roche Ltd, Basel, Switzerland
5. Current address: Umweltbundesamt (UBA), Dessau-Roßlau, Germany
6. University of the Witwatersrand, Department of Zoology, Johannesburg, South Africa
7. Last address: University of Otago, Department of Zoology, Dunedin, New Zealand
8. Dedicated to the late Phillip J Bishop