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Chlorophyceae: Chlorococcales: Radiococcaceae

 Radiococcus sp.

Radiococcus Genus: Planktonic; colony of 4, 8 or 16 cells within a gelatinous sheath; cells arranged pyramidically covered with radial filaments; cell body spherical; a single chloroplast cup-shaped, with a pyrenoid (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species:

Radiococcus sp. (R. nimbatus (De Wildeman) Schmidle ?), cell body μm in diam., x 640, Shirahata-numa, Musashi-Urawa, Saitama city, Saitama Pref., Japan, June 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
Radiococcus Radiococcus Radiococcus

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