Diatoms – SAR-Stramenopiles (Bacillariophyta)

Observations on Coscinodiscus wailesii

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Coscinodiscus wailesii Gran & Angst 1931

Most likely ID: n.a.

Basionym: n.a.

Add’l Synonyms: n.a.

Sampling date 04/2025. Scale bars indicate 100 µm (1), 50 µm (2), 25 µm (3, 4).
Sampling and preparation for the light microscope by Hermann Hochmeier, Wilhelmsburg (Austria).

Four images.

First:

Synoptic representation of the upper valve.

Second:

Synoptic representation of a girdleband part.

Third and fourth:

Close-up showing the delicate sieve plates (cribra) on the outside. In image 4, the focus was placed on the coarser, inner perforated plate at the upper right of the girdle edge.

The SEM images in the block below are from Coscinodiscus concinnus, which has a similar shell structure, and show the frustule structure in detail.

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

Microscope Zeiss Universal, camera Olympus C7070WZ. DOF images.

Detail of Coscinodiscus concinnus

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

Two images.
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 10 µm.
Sampling and preparation for the light microscope by Hermann Hochmeier, Wilhelmsburg (Austria).

Two images. Further valve details.

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

Microscope Zeiss Universal, camera Olympus C7070WZ. DOF images.

Sampling date 04/2011. Scale bar indicates 100 µm.

Valvar view. Insets showing marginal ring of labiate processes (upper right) and the hyaline central area (lower left).

Place name: North Sea around Heligoland
Latitude: 54.186311 Longitude: 7.895034

Microscope Zeiss Universal, camera Olympus C7070WZ. DOF image.

Six images.

First:	LM DIC, close-up of valve of a living specimen. Scale bar indicates 50 µm.
Second:	SEM of girdle view. The ligulae which fit in the open girdle bands are weakly visible. Scale bar indicates 100 µm.
Third:	SEM close-up of the lateral side of the valve. Scale bar indicates 25 µm.
Fourth:	SEM, valvar View. Scale bar indicates 100 µm.
Fifth:	SEM, close-up showing hyaline central area. Scale bar indicates 10 µm.
Sixth:	SEM, close-up showing fine structure of valvar pores. Scale bar indicates 5 µm.

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

a) Microscope Zeiss Universal, camera Olympus C7070WZ. DOF images.
b) SEM

Use of SEM equipment courtesy of Lab Dr. Karl-Heinz Schäffner, Solingen, Germany.

Sampling date 04/2017. Scale bars indicate 100 µm. Two images.

First:	Synoptic representation of the upper valve. Focus on frustule surface with chloroplasts.
Second:	Synoptic representation of the upper valve. Focus lies deeper in the cell’s lumen showing the nucelus surrounded with chloroplasts.

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 Microscope Zeiss Universal, camera Olympus C7070WZ. DOF images.

Six 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.

© 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 wailesii

Detail of Coscinodiscus concinnus

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