Achnanthidium koghisense f. angustifasciatum (G.Moser, Lange-Bert. & Metzeltin) Lange-Bert. Achnanthidium koghisense f. angustifasciatum (G.Moser, Lange-Bert. & Metzeltin) Lange-Bert. in Iconogr. Diatomol. 6: 273. 19991is new combination for Achnanthes koghisense f. angustifasciata G.Moser, Lange-Bert. & Metzeltin1. (Basionym:) fig. 19: 7-11