Fragilaria binodis Ehrenberg, Mikrogeol., pl. 5(2), fig. 26; pl. 6(1), fig. 43; pl. 11, fig. 15. 1854.
Fragilaria construens var. binodis(Ehr.) Grunow 1862.
Ecology
This species is found in cool fresh water and can tolerate high conductivity(Patrick and Reimer 1966). Asymmetric specimens, with a stronger constriction on one side than the other, are most commonly found in eutrophic waters (see "Other Images" above) (Stoermer and Yang 1969).