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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).
Species:

Ochromonas variabilis, cell body spherical about 7 μm in diam., with two chloroplasts, a contractile vacuole at the base of flagellla, x 400, x 640, Omiya city, Saitama Pref., Japan, 2000 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Ochromonas variabilis Ochromonas variabilis Ochromonas variabilis Ochromonas variabilis Ochromonas variabilis Ochromonas variabilis

Ochromonas, x 640, Kurome river, Asaka city, Saitama Pref., 2000 by Y. Tsukii
Ochromonas Ochromonas variabilis Ochromonas variabilis
Cells flattened with coverglass
Ochromonas variabilis Ochromonas variabilis Ochromonas variabilis

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).

Ochromonas Please click on images for viewing enlarged.
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