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Taxonomy and ecology of Fragilaria billingsii sp. nov. and analysis of type material of Synedra rumpens var. fusa (Fragilariaceae, Bacillariophyta) from Brazil

. Phytotaxa. 270, 3 (Aug. 2016), 191–202. DOI:https://doi.org/10.11646/phytotaxa.270.3.3.