1. University of Silesia, Faculty of Earth Sciences, Będzińska 60, 41-200 Sosnowiec, Poland;
2. Department of Zoology, Faculty of Science, Charles University, Viničná 7, 12800, Prague 2, Czech Republic;
3. Department of Earth, Atmospheric and Geographic Information Sciences, Western Illinois University, Tillman Hall 113, 1 University Circle, Macomb, IL 61455, USA;
4. Department of Geology and Environmental Sciences, 205 Jewett Hall, State University of New York at Fredonia, 280 Central Avenue, Fredonia, NY 14063, USA