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Cyanophyceae: Nostocales: Nostocaceae

 Anabaena sp.
[Bory 1822] Bornet et Flahault 1886 (John et al. 2002)
Bory de St. Vincent 1822 sensu Rippka et al. 1979 (Bergey's Manual 2nd. 2001)

Family: Trichome (filamentous structure) with heterocysts; with equal diameter throughout hole length; no branching; heterocysts intervening or at base.
Genus: Mucous sheath, nearly invisible; heterocysts intervening; filments solitary or agglutinate within a gelatinous matrix (Illustrations of The Japanese Fresh-water Algae, 1977).

Anabaena sp., cell body 4-8 μm long, 8 μm wide, L/W=, x 640, Mitsumata-numa biotope, at the border of Kawagoe city, Kawajima town and Ageo city, Saitama Pref., Japan, March 21, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Anabaena

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