1. Laboratory of Genetics, Department of Biology, University of Turku, 20014 Turku, Finland
2. Department of Zoology, Stockholm University, 10691 Stockholm, Sweden
3. Departamento de Biologia Animal and Museu de Zoologia, Instituto de Biologia, Universidade Estadual de Campinas, CP 6109, Campinas, SP 13083-970, Brazil
4. Department of Biology, Middle Tennessee State University, Murfreesboro, TN 37132, USA