Species: Cell body ellipsoidal or slightly ovoid, 10-15 μm long, 5-10.5 μm wide; young daughter cells slightly asymmetrical; cellwall thin; papilla absent; length of flagella nearly the same as that of cell body; chloroplast cup-shaped; a pyrenoid central-lateral or at posterior half of the cell; stigma at equator or anterior; nucleus centrally located or slightly anterior (Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).

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Pyrenoid: single, spherical in shape, located at equatorial side
C. peterfii ? cell 19 x 14 μm s: ?? Kaga Ishikawa, 2000	C. peterfii ? st. Ikk-12, axenic 12-20 x 9-16 μm s: anterior Kaga Ishikawa, 2000	C. peterfii 12-21 x 7-18 μm Iruma river Sayama Saitama, 2004	C. peterfii 10-16 x 8-12 μm Ina Saitama, 2004
C. peterfii ? 15-17 x 10 μm Showa-machi general p. Showa Saitama, 2003	C. peterfii ? or C. parvula ? 15 x 8 μm Senjo-ga-hara Nikko Tochigi, 2003	C. peterfii ? 20 x 13.5 μm near City Hall Fujimi Saitama, 2004	C. peterfii ? 23 x 16 μm Shimo-muneoka Shiki Saitama, 2004
C. peterfii 18 x 11 μm Akigase park Saitama Saitama, 2005

Similar genus -> Chloromonas; Chlorococcum;

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