1. Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental Sciences, P.O. Box 65, FI-00014 University of Helsinki, Finland
2. Finnish Museum of Natural History, P.O. Box 7, FI-00014 University of Helsinki, Finland
3. Department of Geobiology, University of Göttingen, Goldschmidtstraβe 3, D-37077, Göttingen, Germany
4. Department of Computer Science, P.O. Box 68, FI-00014 University of Helsinki, Finland
5. Department of Geosciences and Geography, P.O. Box 64, FI-00014 University of Helsinki, Finland