Eunotia Ehrenberg (Bacillariophyceae) in the Hercílio River, Santa Catarina, southern Brazil

A taxonomic survey was carried out of the genus Eunotia in the Hercílio River, state of Santa Catarina, southern Brazil. Trimestral collections were made (April, July and October 2009) at four sampling stations, totaling 12 samples. The survey of the genus Eunotia resulted in the identification of 30 taxa, four of which were determined at generic level. Ten of the species identified are new reports for the state of Santa Catarina, and six are new records for Brazil: E. ambivalens , E . areniverma, E. crassispinata , E. donatoi , E. macroglossa , and E. sedina .