Taxonomic study of a new combination, Placoneis flabellata (F.Meister) Kimura, H.Fukush. et Ts.Kobay. comb. nov. (Diatom)

Abstract

The diatoms were growing profusely on the bottom mud or on thickly growing Spirogyra (green alga) along the shore of a river in Sulawesi (Indonesia) and identified as Navicula flabellata F. Meister. We investigated the valve morphology, especially the raphe by electron microscopy in addition to the valve shape and chloroplast by the light microscope. Since the shapes of the chloroplast and raphe are like Placoneis, we propose the following new combination, Placoneis flabellata (F.Meister) Kimura, H.Fukush. et Ts.Kobay. comb. nov.