Eunotia nymanniana Grunow and related taxa

Abstract

The type slide of Eunotia nymanniana Grun. was observed. On the basis of this observation, E. nymanniana collected from Japan was examined in detail. The fine structures of this species and Eunotia compacta (Hust. ) Mayama nov. stat. were described. They are clearly distinguished by means of the areolae density in addition to the valve shape.