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, stock Sam-2, axenic culture with EM (September 25 to October 1, 2004),
cell body nearly spherical, 10-11 μm in diam.,
x 640, Maruyama Park, Ageo city, Saitama Pref., Japan, March 2002 by Y. Tsukii
31 μm 63 μm 94 μm; x 640
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).