1. Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
2. Department of Biological and Environmental Sciences, University of Jyväskylä, Jyväskylä, Finland
3. Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Kraków, Poland
4. Invertebrate Zoology Department, Royal BC Museum, Victoria, BC, Canada