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:
Similar genus -->> Nephrocytium;
Oocystis sp.
19-22 x 10 μm
Karakemi marsh
Yasaka
Nagano, 2005
Oocystis sp.
24 x 10.5 μm
Karakemi marsh
Yasaka
Nagano, 2006
Oocystis sp.
19 x 10 μm
Aquatic botanical g.
Sawara
Chiba, 2004
