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Chlorophyceae: Chlorococcales: Oocystaceae

 Franceia sp.

Franceia Genus: Unicellular; planktonic; cell body oval or ellipsoidal, both ends rounded, covered with many elongated spiny-projections; one or 2-4 chloroplasts parietal plate-like with a single pyrenoid (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species:

Franceia sp. ?, cell body nearly spherical, 15 μm in diam., spiny projections up to 20 μm long, x 640, Hasu-ike (pond), Shiga highland, Yamanouchi town, Nagano Pref., Japan, June 19, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Franceia ovalis Franceia ovalis

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