Achnanthidium arcus (Hust.) Lange-Bert.
Achnanthidium arcus in Iconogr. Diatomol. 6: 270. 19991
is new combination for Achnanthes arcus in Int. Rev. Gesamten Hydrobiol. Hydrogr. 42(1-3): 38, fig. 44-48. Jan 1942
Achnanthidium arcus
1. (Basionym:) fig. 44-48