KULIKOVSKIY, Maxim, Horst LANGE-BERTALOT, & Andrzej WITKOWSKI 2009 Nupela matrioschka sp. nov., Nupela thurstonensis comb. nov. and Nupela neogracillima comb. & nom. nov. (Bacillariophyceae): critical analysis of their morphology Polish Botanical Journal 54(1): 13-20, 2 figs., 1 table |