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Chrysophyceae: Ochromonadales: Ochromonadaceae

Ochromonas variabilis
H. Meyer

Ochromonas 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).

Ochromonas sp., cell body μm long, μm wide, x 640, a pond near Asami-numa (Azami-numa), Iwajuku, Kasakake town, Gunma Pref., Japan, October 2001 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Ochromonas Ochromonas

O. mutabilis Klebs: Ovoid to spherical; plastic; 15-30 μm long, 8-22 μm wide (Kudo, 1966). Resembles Chromulina; 1-2 chloroplasts; usually a stigma (How to know the protozoa, 1979).
O. granularis Doflein: 5-12 μm long; no stigma (Kudo, 1966).

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