BAHLS, Loren, & Tara LUNA 2018 (May 9) Cymbopleura laszlorum spec. nov. (Cymbellaceae, Bacillariophyceae), a glacial relic from a calcium-rich floodplain fen in southwestern Montana, USA Phytotaxa 349(1): 47-53, 29 figs., 2 tables