Species: Cell body ellipsoidal or nearly spherical, up to 20-30 μm long, 18-26 μm wide; a very small papilla present (inconspicuous ?); a stigma circular in shape, located at equator; chloroplasts cup-shaped with large central concave; a pyrenoid close to posterior end of the cell body (Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).
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Similar genus -> Chloromonas; Chlorococcum;
Pyrenoid: single, spherical in shape, located at posterior half Stigma at equator 
C. saxonensis ?
22 x 18 μm φ
papilla present
Iruma river
Sayama
Saitama, 2004
C. saxonensis ?
15-20 x 7-15 μm φ
papilla present
Tachikawa
Tokyo, 2004
