Lutz Kunzmann (a), Zlatko Kvacek (b), Vasilis Teodoridis (c) & Karolin Moraweck (a)
(a) Museum of Mineralogy and Geology, Senckenberg Natural History Collections Dresden, Königsbrücker Landstrasse 159, 01109 Dresden, Germany. E-mail: lutz.kunzmann@senckenberg.de
(b) Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic.
(c) Department of Biology and Environmental Studies, Faculty of Education, Charles University in Prague, M.D. Rettigové 4, 116 39 Prague 1, Czech Republic.