Genus: Unicellular; cell body ellipsoidal or spindle-shaped, attached on a substrate at one end;
a single chloroplast plate-like in shape, with a pyrenoid
(Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Similar genus --> > Colacium; Characiopsis; Characiochloris; Hydiranum; Characium gelatinosa ?,
cell body μm long, μm wide, a pyrenoid present,
x 640, Showa-machi general park, Showa town, Saitama Pref., Japan, August 2003 by Y. Tsukii
150 μm; x 400