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