Diatoms – SAR-Stramenopiles (Bacillariophyta)

Observations on Skeletonema costatum

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Skeletonema costatum (Greville) Cleve 1873

Most likely ID: n.a.

Basionym: Melosira costata Greville 1866

Add’l Synonyms: n.a.

Sampling date 01/2022. Scale bars indicate 25 µm (1, 2), 10 µm (3-6).

Three pairs of girdleband view/optical cross section in two magnification steps.

First couple:	Girdleband view showing silicious connection processes, cross section showing chloroplasts and some nuclei.
Second couple:	Close-up. a) Girdleband view: Some ultrathin floating processes made of chitin become visible. b) Cross section: Chloroplasts and some nuclei become clearly visabe.
Third couple:	Close-up. Girdleband view: The ultrathin floating processes made of chitin are clearly visible. These chitinous processes are characteristic of the Thalassiosirales.

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Place name: Baltic Sea, Kieler Förde, Kiel Fjord (Germany)
Latitude: 54.3894126 Longitude: 10.1749055

Microscope Zeiss Axioplan, 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.

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Observations on Skeletonema costatum

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