Micrasterias
Desmidiaceae –
Archaeplastida

Observations on Micrasterias pinnatifida

Gallery Prof. Rupert Lenzenweger

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Micrasterias pinnatifida Ralfs 1848

Most likely ID: n.a.

Basionym: n.a.

Add’l Synonyms: Euastrum pinnatifidum Kützing 1845
                               Euastrum bifidum G.W.Focke 1847
                               Euastrum didymacanthum Nägeli 1849
                               Tetrachastrum pinnatifidum (Ralfs) R.V.Dixon 1859
                               Tetrachastrum didymacanthum (Nägeli) W.Archer 1861
                               Micrasterias oscitans var. pinnatifida (Kützing ex Ralfs) Rabenhorst 1868
                               Holocystis pinnatifida (Kützing) Nordstedt 1896

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.

© Wolfgang Bettighofer,
images under Creative Commons License V 3.0 (CC BY-NC-SA).
For permission to use of (high resolution) images please contact postmaster@protisten.de.

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Observations on Micrasterias pinnatifida

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