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Chlorophyceae: Chlorococcales: Oocystaceae

Oocystis marssonii
Lemmermann

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 ellipsoid to broad-ellipsoid, with a slightly projected, thickened cell wall at both ends, 12-18 μm long, 8-16 μm wide; 2, 4, or 8 autospores enclosed within a enlarged mother cellwall; chloroplasts 1-4, parietal laminate, each with a pyrenoid (Photomicrographs of the Freshwater Algae, vol. 18, 1997).
Similar genus -->> Nephrocytium;


Oocystis marssonii Lemmermann, cell body 16 μm long, 9 μm wide, x 640, near Koga museum, Koga city, Ibaraki Pref., Japan, October 2003 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Oocystis marssonii Oocystis marssonii


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