1. Department of Developmental Biology and Morphology of Invertebrates; Institute of Zoology and Biomedical Research, Jagiellonian University in Kraków, Gronostajowa 9; Kraków 30-387 Poland
2. Department of Ichthyology; Faculty of Environmental Science, University of Warmia and Mazury in Olsztyn, Oczapowskiego 5; Olsztyn 10-917 Poland