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Cyanophyceae: Nostocales: Rivulariaceae

 Calothrix sp.
[C. Agardh 1824] Bornet et Flahault 1886 (John et al. ed. 2002)

Family: Trichome (filamentous structure) tapered from base to tail
Genus: Heterocysts present; one trichome within a sheath; coenobium absent (Illustrations of The Japanese Fresh-water Algae, 1977).

Calothrix sp., cell body 7-8 μm long, 8 μm wide, x 200, x 400, x 640, Ukishima marsh, Tsugaike highland (Tsugaike Natural Park), Otari village, Nagano Pref., Japan, August 11, 2006 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
Calothrix Calothrix Calothrix Calothrix Calothrix Calothrix Calothrix Calothrix

Images of collecting locality: Ukishima marsh (or bog), Tsugaike highland (Tsugaike Natural Park), Otari village, Nagano Pref., Japan, August 11, 2006 by Y. Tsukii

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