PONADER, Karin C., Marina G. POTAPOVA, Nina DESIANTI, Paul B. HAMILTON, Isabelle LAVOIE & Stéphane CAMPEAU 2017 (Mar. 13) Gomphonema caperatum sp. nov., G. obstipum sp. nov. and similar taxa from rivers of North America Diatom Research 32(1): 59-73, 70 figs., 1 table |