Valve linear-elliptical, gradually narrowing to round ends. Axial area narrow, distinct; gradually widening toward the central area which is a transverse fascia. Terminal fissures of the raphe intermediate between "bayonet" and "comma" shapes(Patrick and Reimer 1966).
Navicula brebissonii Kutz., Bacill., p. 93, pl.3, fig. 49; pl. 30, fig. 39. 1844(Patrick and Reimer 1966).
Pinnularia stauroneiformis W. Sm., Syn. British Diat., vol. 1, p. 57, pl. 19, fig. 178. 1853(Patrick and Reimer 1966).
Pinnularia microstauron var. brebissonii (Kutz.) Hust. in Pasch., Sussw.-Fl. Mittel-europas, Heft 10, Aufl. 2, p. 321, fig. 584. 1930(Patrick and Reimer 1966).
Ecology
This taxon seems to prefer cool waters of low mineral content. It is found in a wide range of pH levels, in numerous habitats(Patrick and Reimer 1966; Beaver 1981).