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).
Species:
Similar genus --> > Characiopsis; Colacium; Characiochloris; Hydiranum; Characium ? (or Characiopsis ?) ,
cell body 100 μm long, 24 μm wide,
x 400, x 640, near Oh-hashi (large bridge), Asa-kawa (Asa river), Hachioji city, Tokyo, Japan, March 26, 2005 by Y. Tsukii
31 μm
63 μm
94 μm; x 640