1. Institute of Parasitology, Slovak Academy of Sciences, Hlinková 3, 040 01 Košice, Slovakia
2. Dpt. of Parasitology, University of Veterinary Medicine and Pharmacy in Košice, Komenského 73, 041 81 Košice, Slovakia
3. Institute of Biology, Department of Invertebrate Systematics and Ecology, Wrocław University of Environmental and Life Sciences, Kożuchowska 5b, 51-631 Wrocław, Poland