Description: The cells are only a little wider than long. The cell halves form three lobes, the lateral lobes are tapered peripherally and have a few denticles at the blunted ends. The lateral lobes are short and are strongly widened with straight ends. The central cut ist deep and strongly widened peripherally.

Dimension: Length (30)–50–70–(80) µm, width (35)–55–75–(85) µm, L/B (0.75)–0.8–1.0–(1.1).

Occurrence: Common in moderate acidic to neutral waters of fens and litoral zones.

Left: Original graphic by Prof. Lenzenweger.
Right: Photomicrograph by Prof. Lenzenweger. For microphotography, the microscope illumination was adjusted in such a way that as many features as possible that are important for species identification are prominently displayed.

Copyright by Prof. Rupert Lenzenweger, Ried im Innkreis, Austria.