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Cyanophyceae: Nostocales: Oscillatoriaceae

 Spirulina major
Kützing f. major

Family: Trichome (filamentous structure) lacks heterocysts; with equal diameter throughout whole length; no hair-like structure; no branching.
Genus: (Illustrations of The Japanese Fresh-water Algae, 1977).

Spirulina major Kützing f. major ?, trichome 1.8 μm wide, spirals 3.8 μm wide, x 400, x 640, near Ukima Park, Kita-ku, Tokyo, Japan, July 2001 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
Spirulina Spirulina

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