ŠTASTNÝ, Jan & Frans A.C. KOUWETS 2012 New and remarkable desmids (Zygnematophyceae, Streptophyta) from Europe: taxonomical notes based on LM and SEM observations. Fottea 12(2): 293-313, 69 figs., 1 table Actinotaenium riethii, Closterium pseudocostatum, Cosmarium discrepans and C. hostensiense spp. nov.; Cosmarium lenzenwegeri comb. nov.