Euastrum
Desmidiaceae –
Archaeplastida

Observations on Euastrum rhomboidale

Protisten / Protisten.de – created by Wolfgang Bettighofer / Algae green-colored (2: Desmidiaceae): Euastrum / Euastrum rhomboidale

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

Euastrum rhomboidale (Ducellier) Coesel & Meesters 2023

Most likely ID: n.a.

Basionym: Euastrum ansatum var. rhomboidale Ducellier 1918

Add’l Synonyms: n.a.

Sampling date 06/2025. Scale bars indicate 25 µm.

Four images.

First to third:	Synoptic representation of the cell showing chloroplast wings and oleosomes (storage substances).
Fourth:	The optical cross section through the cell shows the cell nucleus, pyrenoids and storage substances (oleosomes).

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 06/2023. Scale bars indicate 25 µm (1, 3–5), 10 µm (2).

Five images.

First and third:	Synoptic representation of the upper cell wall. Inset: Higher magnification of the pores in the cell wall through which the protective mucus is secreted. Regarding the third image: The circular pattern on the cell wall is caused by the slight contusion caused by the coverslip pressure.
Second:	Optical cross-section through the chloroplasts showing parts of the lobed chloroplast and storage substances (oleosomes and crystals).
Fourth:	The optical cross section through the cell shows parts of the lobed chloroplast and storage substances (crystals).
Fifth:	The optical cross section through the cell shows pyrenoids and storage substances (crystals). In the pyrenoids, the cell produces the storage substance starch, which is deposited as a shell around them, which can be clearly seen here.

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: Wetland Lauchseemoor, Fieberbrunn (Tyrol, Austria)
Latitude: 47.46954439 Longitude: 12.53826499 Elevation: 868 m

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

Sampling date 06/2024. Scale bars indicate 25 µm.

Five images. Optical journey into the cell.

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: Wetland Lauchseemoor, Fieberbrunn (Tyrol, Austria)
Latitude: 47.46954439 Longitude: 12.53826499 Elevation: 868 m

Microscope Zeiss Universal, camera Olympus OM-D M5 MKII. 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.

Protisten.de

Observations on Euastrum rhomboidale

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