Genus:
Species: Cell body 140-200 (340) μm long, 25-40 (42) μm wide
(Süßwasserflora von Mitteleuropa 2/1, Bacillariophyceae 1, 1997).
Pinnularia maior (or P. macilenta (Ehrenberg) Ehrenberg ?),
cell body 248 μm long, 32 μm wide,
x 400, x 640, O-yachi, Komado marsh (or bog), Showa village and Tajima town, Fukushima Pref., Japan, August 22, 2004, by Y. Tsukii
31 μm
63 μm
94 μm; x 640