Hannaea subarcus (Iwahashi) Q. Liu, Glushchenko, Kulikovskiy & Kociolek, comb. nov., stat. nov.

Ceratoneis recta f. subarcus Y. Iwahashi, Journal of Japanese Botany 12: 391, text fig. 1, d-f (1936). — Hannaea arcus var. subarcus (Iwahashi) Lee in Lee et al. The Japanese Journal of Diatomology 7: 50, pl. 2: fig. 34 (1992).

LOCALITY. — Western Japan.