Cosmarium
Desmidiaceae –
Archaeplastida

Observations on Cosmarium tetraophthalmum

Gallery Prof. Rupert Lenzenweger

Protisten / Protisten.de – created by Wolfgang Bettighofer / Algae green-colored (2: Desmidiaceae): Cosmarium / Cosmarium tetraophthalmum – Prof. R. Lenzenweger

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Cosmarium tetraophthalmum Brébisson ex Ralfs 1848

Most likely ID: n.a.

Basionym: n.a.

Add’l Synonyms: Heterocarpella tetrophthalma Kützing 1834
                               Euastrum tetrophtalmum (Kützing) Kützing 1845
                               Euastrum tetraophthalmum (Brebisson ex Ralfs) Nägeli 1849
                               Didymidium tetraophthalmum (Kützing) Reinsch 1866
                               Ursinella tetraophthalma (Kützing) Kuntze 1891

Description: The cells are 1.5 times longer than wide and trapezoid in shape, the cell terminations are truncated. The cell wall is covered with scattered standing warts. The central cuts are deep and strongly broadened towards the periphery.

Dimension: Length 90–120–(135) µm, width 60–86–(94) µm.

Occurrence: Very adaptable alga, in medium acidic up to alcaline waters. Ubiquitous, often abundant.

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 Cosmarium tetraophthalmum

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