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Chlorophyceae: Chlorococcales: Oocystaceae

Oocystis ecballocystiformis
Iyengar var. ecballocystiformis

Oocystis Genus: Planktonic; colony of 2-8 cells surrounded by cell wall of their mother cell, but sometimes unicellular; cell body broad ellipsoidal, both ends slightly pointed and with a thick cell wall; 1-3 chloroplasts parietal plate-like, with a single pyrenoid (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species: Cell body elongated ellipsoidal, (16-)18-24 μm long, 5.5-7(-10) μm wide; both ends rounded without cellwall thickening; cellwall thin; chloroplasts 2, 4 or 8 in number, parietal, disc-shaped, each with a single pyrenoid (Photomicrographs of the Freshwater Algae, vol. 6, 1987).
Similar genus -->> Nephrocytium;


Oocystis ecballocystiformis Iyengar var. ecballocystiformis ??, cell body 9-15 μm long, 6-8 μm wide, x 640, Azuma river (close to Yanase river), Tokorozawa city, Saitama Pref., Japan, March 14, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Oocystis Oocystis Oocystis Oocystis


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