WILLIAMS, David M. 2019 (Nov. 6) '2020' Studies on type material from Kützing's diatom collection I: Synedra vitrea Kützing, with comments on Ulnaria fragilariaeformis (F.E. Fritsch and M.F. Rich) D.M. Williams, nov. stat. et nov. comb. and Ulnaria undulata (Rabenhorst) D.M. Williams, nov. stat. et nov. comb. Botany Letters 167(1): 70-85, 47 figs., 1 table cardnote: |