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 sp.,
cell body spindle-shaped, 13 μm long, 3 μm wide, L/W=,
x 640, a small pond near Shide-numa (pond), near Watarase-yusuichi (Watarase wetland), Kita-kawabe town, Saitama Pref., April 10, 2005 by Y. Tsukii
150 μm; x 400