BAK, Malgorzata, Horst LANGE-BERTALOT, Jacek NOSEK, Zofia JAKUBOWSKA, & Malgorzata KIELBASA 2014 Diatoma polonica sp. nov. — a new diatom (Bacillariophyceae) species from rivers and streams of southern Poland Oceanological and Hydrobiological Studies 43(2): 114-122, 5 figs., 2 tables