Genus:
Species: Cell body 50-170 μm long, 10-30 μm wide
(Süßwasserflora von Mitteleuropa 2/1, Bacillariophyceae 1, 1997).
Pinnularia viridis (Nitzsch) Ehrenberg,
cell body 141 μm long, 26 μm wide,
x 640, Lake Nojiri, Shinano town, Nagano Pref., Japan, November 7, 2004 by Y. Tsukii
31 μm
63 μm
94 μm; x 640