1. Paläontologisches Institute und Museum; Karl-Schmid Strasse 4 CH 8006 Zürich Switzerland
2. School of Biological; Earth and Environmental Sciences; University of New South Wales; High Street Kensington NSW 2052 Australia
3. Zoological Institute; University of Basel; Vesalgasse 1 CH 4051 Basel Switzerland
4. Institute of Fisheries Ecology; Johann Heinrich von Thünen-Institute; Federal Research Institute for Rural Areas, Forestry and Fisheries; Palmaille 9 22767 Hamburg Germany