Neidium bisulcatum var. subundulatum(Grunow) Reimer
Family: Neidiaceae
[Navicula firma var. subundulata Grunow ex A.Schmidt et al., moreNeidium bisulcatum f. inflata Mayer, Neidium bisulcatum f. major Cleve-Euler, Neidium bisulcatum f. undulata (O.Müller) Hustedt, Neidium bisulcatum var. undulata O.Müller]