Species: Cell body ellipsoidal, 13-21 μm long, 7-16 μm wide; papilla present; pyrenoid posterior; stigma equatorial; nucleus anterior (Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).

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C. callosa ? 15.5-21 x μm Dewa Park Koshigaya Saitama, 2006

C. callosa ? 15-20 x μm Kawaguchi n.p. Kawaguchi Saitama, 2006

Similar genus -> Chloromonas; Chlorococcum;

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