Genus: Solitary or colonial; body surface delicate; one to two chloroplasts; usually with a stigma; fresh water (Kudo, 1966). One to several chloroplasts; pyrenoid and/or eyespot (stigma) in some; cells naked, globular, ellipsoidal or pyriform (Illustrated Guide, 1985).
Species: Cell body 7-13 μm long, 5-10 μm wide (Süßwasserflora von Mitteleuropa 1, Chrysophyceae und Haptophyceae, 1985).
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O. margaritata ?
12-17 x 9-11 μm
Chichibu Muse Park
Saitama, 2003
O. margaritata ?
13-15 x 6-7 μm
near City Hall
Fujimi
Saitama, 2004
O. margaritata ?
11-14 x 7-9 μm
Omoi river
Oyama
Tochigi, 2004
O. margaritata ?
10 x 7 μm
Ikenokochi marsh
Tsuruga
Fukui, 2004
O. margaritata ?
8-10 x 7-8 μm
Aquatic botanical g.
Sawara
Chiba, 2004Similar Genus ->> Monas
