1. Institute of Vertebrate Biology, Czech Academy of Sciences, Květná 8, 603 65 Brno, Czech Republic; e-mail: bryja@brno.cas.cz
2. Department of Biology and Institute of Mountain Research & Development, Mekelle University, Ethiopia; e-mail: meheretu.yonas@mu.edu.et
3. Department of Zoology, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic; e-mail: sumbera@prf.jcu.cz
4. A. N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences, Moscow, Russia; e-mail: llavrenchenko@gmail.com