Genus: Similar to Ochromonas, but colourless;
cells ovoid, free-swimming, or attached by a protoplasmic thread, or mutually attached to form
spherical colonies; 1 contractile vacuole (Illustrated Guide, 1985).
cell body μm long, μm wide,
x 640, Wata-uchi-ike (pond), Chiba Park, Chiba City, Chiba Pref., Japan, July 2003 by Y. Tsukii
150 μm; x 400