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Cyanophyceae: Nostocales: Oscillatoriaceae

 Oscillatoria tenuis
var. tergestina Rabenhorst

Species [ var. tenuis Agardh ]: Trichome straight, bluegreen, slightly curved at terminal, 2.5-5 μm long, 4-10 μm wide, L/W=1/3 (0.3); septum slightly constricted, granules present along septum; apical cells semispherical, its wall sometimes thickened.
[ var. asiatica Wille ]: 4.5-6 μm long, 10-12 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).

Oscillatoria tenuis var. tergestina Rabenhorst (or Oscillatoria hamelii Frémy ?), trichome 5.5 μm in diam., cell body 3.5-6 μm long, L/W=0.13-1.10, x 400, x 640, Japan, April 1999, by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Oscillatoria Oscillatoria

Oscillatoria hamelii Frémy: Trichome slightly wavy, 4.8-5 μm in diam., with a slight constriction at cell-cell junction, granules absent along septum, cell body 7-8 μm long, L/W=1.5 , terminal cells rounded (Illustrations of the Japanese Fresh-water Algae, 1977).

Oscillatoria tenuis var. tergestina Rabenhorst: Trichome straight, 4-6 μm in diam., with a slight constriction at cell-cell junction, granules present along septum, cell body short, L/W=1/3 , terminal cells semicircular (Illustrations of the Japanese Fresh-water Algae, 1977).

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