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:

31 μm 63 μm 94 μm; x 640

* Ochromonas margaritata Skuja: Cell body 7-13 μm long, 5-10 μm wide (Süßwasserflora von Mitteleuropa 1, Chrysophyceae und Haptophyceae, 1985).

Ochromonas vasocystis Doflein: Cell body up to 10 μm long (Süßwasserflora von Mitteleuropa 1, Chrysophyceae und Haptophyceae, 1985).

Ochromonas nasuta Skvortzov: Cell body 12-14 μm long (Süßwasserflora von Mitteleuropa 1, Chrysophyceae und Haptophyceae, 1985).

O. mutabilis Klebs: Cell body ovoid to spherical in shape, 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: Cell body 5-12 μm long; no stigma (Kudo, 1966).