Observations on the two rheophilic species of the genus Synedra (Bacillariophyceae ): S. inaequalis H. Kob. and S. lanceolata KÜtz.

Abstract

Synedra inaequalis, previously reported by H. KOBAYASI from the Ara-kawa ( Ara River ), Japan, was re-examined using scanning electron m icroscopy ( SEM ). A type is designated, thereby validating this previousl y invalid name. Synedra lanceolata Utz., new to Japanese rivers is also examined by SEM.