I find Gonatozygon kinahanii regularly, but rarely in the Simmelried. Up to now I have found exclusively single cells and a pair of cells (s. fig. 5). Filaments with several cells I have not found yet.

Gonatozygon kinahanii can be identified by the shape of the cell ends which neither widen nor taper. The cell ends are transversely truncated. Sometimes the cell ends are still convexly rounded (s.  fig. 1 a). The two chloroplasts are symmetrically aligned in both halves of the cell. Their flat and ribbon-like shape can be seen by carefully rotating the cell under the coverslip (s. fig. 1 a-b). In the cytoplasm, there are often small, colorless crystals, which cluster especially in the terminal vacuoles (s. figs 4 and 5).