Family: Unicells; cell wall separating into two parts (Illustrations of The Japanese Fresh-water Algae, 1977).
Genus: Test (cellwall) variable in shape, cross section elliptial or circular; its surface coarse or cracked, reddish in color or opaque; protoplast ovoid in shape, apart from the test; two flagella emerging from the space between the tests; chloroplast cup-shaped, with pyrenods; stigma present/absent; nucleus centrally located; two contractile vacuoles apical (Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).

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C. conradii or C. elliptica ? cell μm test μm flag. μm Naruto Chiba, 2003

Coccomonas sp. cell 10 μm test 22 x 20 μm Sannoh park Nishi-ku Saitama, 2004

Coccomonas sp. test 21 x 19 μm Ikenokochi marsh Tsuruga Fukui, 2004

Coccomonas sp. test 27 x 22 μm near Akai wetland Aizuwakamatsu Fukushima, 2005

Similar genus -->> Dysmorphococcus; Phacotus; Hemitoma;

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