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Wengrat, S.; Marquardt, G. C.; Bicudo, D. D. C.; Bicudo, C. E. D. M.; Wetzel, C. E.; Ector, L. (2015). Type analysis of Cymbella schubartii and two new Encyonopsis species (Bacillariophyceae) from southeastern Brazil. Phytotaxa. 221(3): 247.