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Ulvophyceae: Ulotrichales: Ulotrichaceae

 Geminella sp.

Geminella Genus: Filamentous algae without branching, no rhizoids, covered with gelatinous sheath; cell body cylindrical or ellipsoidal, cells attached side by side or separated; a single chloroplast band-form, with a pyrenoid (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species:

Geminella sp. (similar to Planctonema sp.), cell body 10-12 μm long, 6 μm wide, L/W=1.7-2.0, x 200, x 400, x 640, riverside at Satsunai river, Obihiro city, Hokkaido, Japan, October 15, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Geminella Geminella Geminella
x 640
Geminella Geminella Geminella

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