Species:
Colony of 8 or 16 cells, layered by 4-celled "chaplet", up to 45 (-58) μm long;
cell body ovoid or pear-shaped, slightly asymmetrical, posteriorly narrowed, but not drown out,
10-25 μm long; cellwall thin; flagella 1.5 times longer than the cell body;
chloroplast cup-shaped; stigma located around the backward-inclined area of the cell
(Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).
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