1. Finnish Museum of Natural History, PO Box 44, Fi-00014 University of Helsinki, Finland;
2. Institut für Geologie, Universität Hamburg, Bundesstr. 55, 20146 Hamburg, Germany;
3. Centre for Biological Diversity, School of Biology, Sir Harold Mitchell Building & Dyers Brae, University of St Andrews KY16 9TH, Scotland, UK;
4. Natural History Museum, University of Oslo, PO Box 1172 Blindern, NO-0318 Oslo, Norway;
5. Department of Geology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia;