Species:
Cell body spherical or slightly ellipsoidal, 8-20 μm long, 6-18 μm wide;
papilla present, with flattened apex; a pyrenoid located at posterior half of the cell body;
nucleus anterior; stigma circular in shape, located anterior or equatorial
(Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).
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