Diatoms – SAR-Stramenopiles (Bacillariophyta)

Observations on Coscinodiscus concinnus

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Coscinodiscus concinnus W.Smith 1856

Most likely ID: n.a.

Basionym: n.a.

Add’l Synonyms: n.a.

Sampling date 04/2017.

Three images.

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: North Sea around Heligoland
Latitude: 54.186311 Longitude: 7.895034

Leica dissecting microscope, camera Olympus OM-D E-M5 II. DOF images.

Sampling date 01/2022. Scale bars indicate 100 µm.

Five images, four of them in a slide changer.

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

Stereo microscope Olympus SZX16/Planapo 2.0x, camera Olympus OM-D E-M5 II. DOF images.

Sampling date 04/2025. Scale bars indicate 100 µm (1), 10 µm (2, 3).
Sampling and preparation for the light microscope by Hermann Hochmeier, Wilhelmsburg (Austria).

Three images.

First:	Synoptic representation of the valve.
Second:	Detail of the valve center showing the fine sieve pores (called cribra) of the outer surface of the frustule.
Third:	Internal view of the valve margin. The processes are called rimoportulae or labiate processes; they secrete mucilage that serves to adhere to a substrate. This phenomenon is shown here.

Place name: Heligoland harbor
Latitude: 54.177119 Longitude: 7.893548 Elevation: 0 m

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

Sampling date 04/2025. Scale bars indicate 100 µm (1), 5 µm (2), 1 µm (3).
Sampling and preparation for the light microscope by Hermann Hochmeier, Wilhelmsburg (Austria).

Three images.

First:	Valve, inner surface.
Second and third:	A high-magnification view of the inner girdleband surface reveals its double-layered structure. The delicate sieve areas (cribra) on the outer surface are visible through the larger openings of the inner perforated plate.

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: Heligoland harbor
Latitude: 54.177119 Longitude: 7.893548 Elevation: 0 m

Tescan Clara SEM, © Wolfgang Bettighofer/Jürgen Stampfl

Sampling date 04/2025. Scale bars indicate 20 µm (1), 5 µm (2), 2 µm (3).
Sampling and preparation for the light microscope by Hermann Hochmeier, Wilhelmsburg (Austria).

Three images.

First:	At medium magnification, the row of rimoportulae (labiate processes) can already be seen on the inner edge of the valve.
Second and third:	Labiate processes at high magnification.

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: Heligoland harbor
Latitude: 54.177119 Longitude: 7.893548 Elevation: 0 m

Tescan Clara SEM, 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 Coscinodiscus concinnus

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