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Chlorophyceae: Chlorococcales: Oocystaceae

 Selenastrum gracile
Reinsch

Selenastrum Genus: Colonies of 4, 8 or 16 cells; planktonic; body crescent in shape; tapered at both ends; cells attached to each other at dorsal surface; a chloroplast curved plate-like, with a pyrenoid (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species: Cell body 13-30 μm long, 3-5 μm wide (Photomicrographs of the Freshwater Algae, vol. 2, 1984).
Similar Genus ->> Kirchneriella; Ankistrodesmus; Selenodictyum;

Selenastrum gracile Reinsch, cell body μm long, μm wide, x 640, a lotus pond, Sa-numa park, Shimotsuma city, Ibaraki Pref., Japan, October 2003 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Selenastrum gracile

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