Species:
Mature cell body spherical or ellipsoidal, 12-15 μm in diam.;
young cell body ellipsoidal or cylindrical, 8-13 μm long, 4-7 μm wide;
rounded papilla present; chloroplast cup-shaped, with a large concave;
stigma rounded, located anterior 1/4 of the cell body; nucleus centrally located
(Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).
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