1. Stano Pekár, Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic; E-mail: pekar@sci.muni.cz
2. Yael Lubin, The Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Israel; E-mail: lubin@bgu.ac.il