Desmidiales and
Zygnematales –
Archaeplastida

Observations on Actinotaenium cucurbita

Protisten / Protisten.de – created by Wolfgang Bettighofer / Algae green-colored (2: Desmids): other Zygnematophyceae / Desmidiales / Desmidiaceae / Actinotaenium cucurbita

Position in the EOL taxonomic tree. Please click on the tree view below to access EOL (Encyclopedia of Life).

Actinotaenium cucurbita (Brébisson ex Ralfs) Teiling 1954

Most likely ID: n.a.

Basionym: Cosmarium cucurbita Brébisson ex Ralfs 1848

Add’l Synonyms: Dysphinctium cucurbita (Brebisson ex Ralfs) Grunow 1859
                               Calocylindrus cucurbita (Brebisson ex Ralfs) Kirchner 1878
                               Cosmarium cucurbita f. majus West 1892
                               Cosmarium cucurbita f. latius West 1892
                               Cosmarium cucurbita var. attenuatum G.S.West 1904
                               Cosmarium cucurbita f. latius West & G.S.West 1908
                               Actinotaenium cucurbita f. latius (West & G.S.West) Teiling 1954
                               Actinotaenium cucurbita var. attenuatum (G.S.West) Teiling 1954
                               Actinotaenium cucurbita f. majus (West) Teiling 1954
                               Cosmarium cucurbita var. latius (West & West) Willi Krieger & Gerloff 1969

Sampling date 06/2025. Scale bars indicate 10 µm.

Five images. Optical journey into the cell.

First:	Synoptic representation of the cell wall with its pores. The gelatinous mass enveloping the cell is transported outwards through these pores (one of which is marked with an arrowhead).
Second to fourth:	Two optical cross-section showing lobes of the chloroplasts.
Fifth:	The cell nucleus and the two chloroplasts with a pyrenoid each.

Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!

Place name: Moor called Schwemm near Walchsee (Tyrol, Austria)
Latitude: 47.657707 Longitude: 12.299540 Elevation: 669 m

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

Sampling date 06/2025. Scale bars indicate 20 µm.

Place name: Wetland Paradieswiese near Kitzbühel (Tyrol, Austria)
Latitude: 47.47375067 Longitude: 12.37624884 Elevation: 777 m

Tescan Clara SEM, © Wolfgang Bettighofer/Jürgen Stampfl

© 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 Actinotaenium cucurbita

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