Revision of European Brachysira species (Brachysiraceae, Bacillariophyta): II. The Brachysira styriaca and B. zellensis group

This second paper on the revision of the taxonomic identity of several Brachysira species in Europe deals with Brachysira styriaca (Grunow) R.Ross and B. zellensis (Grunow) Round & D.G.Mann. Both s...