Species: Trichome slightly wavy, not attenuated toward ends, 7-8 μm long, 4.8-5 μm wide,
L/W=1.5; septum slightly constricted, granules absent along septum; terminal cells rounded
(Illustrations of The Japanese Fresh-water Algae, 1977).
Oscillatoria hamelii Frémy,
cell body 3.5-7.0 μm long, 5 μm wide, L/W=0.7-1.4,
x 640, near Kejo-numa, Furukawa city, Miyagi Pref., Japan, November 2003 by Y. Tsukii
31 μm
63 μm
94 μm; x 640