Elliptical body with a firm pellicle; dorsal side convex,
ventral side slightly flat; "cytopharynx" with granules; two lateral chromatophores
(chloroplasts) vary in color from green to blue-green, brown or rarely red; 1-3 contractile
vacuoles anterior (Kudo, 1966).
Cell body cylindrical or elongated ovoid; cytopharynx inconspicuous, two rows of ejectisomes (formerly trichocysts)
cell body 22 μm long, 10 μm wide,
x 640, Akigase Park, Saitama city, Saitama Pref., Japan, March 2002 by Y. Tsukii
31 μm 63 μm 94 μm; x 640