Species: Cell body spherical in shape, 6-8 μm in diam.; papilla absent; chloroplast cup-shaped, with a large anterior concavity; a single pyrenoid located at posterior half of the cell body; stigma circular in shape, located at equator; nucleus at anterior (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. microsphaerella ?
or C. lapponica ?
cell 11 μm φ
papilla absent
Kawagoe
Saitama, 2001
C. microsphaerella ?
or C. lapponica ?
9-12 μm φ
papilla absent
Izumi-no-mori
Yamato
Kanagawa, 2003
C. microsphaerella ?
or C. lapponica ?
body ellipsoidal
9 x 8 μm
Sendabori
Chiba, 2002
