Desmids –
Archaeplastida (Part)

Observations on Cosmarium simplicius

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Cosmarium simplicius (West & G.S.West) Grönblad 1931

Most likely ID: n.a.

Basionym: Cosmarium elegantissimum var. simplicius West & G.S.West 1898

Add’l Synonyms: Cosmarium elegantissimum f. minus West 1892

Sampling date 06/2023. Scale bar indicates 25 µm.

Remarks on the synonymization of Cosmarium simplicius and Cosmarium elegantissimum forma minus:
The ornamentation of the cell surface of Cosmarium elegantissimum forma minus and the type variety (Cosmarium elegantissimum var. elegantissimum) is the same, namely double warts. In contrast, the warts of Cosmarium simplicius are described as single warts.

The three specimens shown here fit the description of Cosmarium elegantissimum forma minus, but not that of Cosmarium simplicius!

Place name: Wetland Paradieswiese near Kitzbühel (Tyrol, Austria)
Latitude: 47.47375067 Longitude: 12.37624884

Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF image.

Sampling date 06/2013. Scale bars indicate 25 µm.

Two images.

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Place name: Wetland Mittermoos near Fieberbrunn (Tyrol, Austria)
Latitude: 47.47998695 Longitude: 12.5240922

Microscope Zeiss Universal, camera Canon 600D. DOF images.

© 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 simplicius

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