1 Faculty of Sciences, University of South Bohemia, České Budějovice (Budweis), Czech Republic; Institute of Entomology, Biology Centre, Czech Academy of Sciences, České Budějovice (Budweis), Czech Republic. Electronic address: akrejci@prf.jcu.cz.
2 Faculty of Science, Charles University, Prague, Czech Republic.
3 Faculty of Sciences, University of South Bohemia, České Budějovice (Budweis), Czech Republic; Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice (Budweis), Czech Republic.
4 Faculty of Science, Charles University, Prague, Czech Republic; Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice (Budweis), Czech Republic.