Diatoms – SAR-Stramenopiles (Bacillariophyta)

Observations on Ditylum brightwellii

Protisten / Protisten.de – created by Wolfgang Bettighofer / Bacillariophyta / Mediophyceae / Lithodesmiales / Ditylum brightwellii

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

Ditylum brightwellii (T.West) Grunow 1885

Most likely ID: n.a.

Basionym: Triceratium brightwellii T.West 1860

Add’l Synonyms: Ditylum trigonum L.W.Bailey ex L.W.Bailey 1862
Ditylum inaequale Bailey ex L.W.Bailey 1862

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

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

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

Sampling date 01/2022. Scale bar indicates 100 µm.

The cell in the upper part has developed into a resting cyst.

Koester, J. A., Brawley, S. H., Karp-Boss, L., & Mann, D. G. (2007). Sexual reproduction in the marine centric diatom Ditylum brightwellii (Bacillariophyta). European Journal of Phycology, 42(4), 351-366. https://doi.org/10.1080/09670260701562100

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 M5 MKII. DOF image.

Sampling date 12/2025. Scale bars indicate 50 µm (1–3), 10 µm (4–6).

Four images. Two cells starting to produce a resting cyst.

First to third:	Synoptic representation of the complete frustule and optical cross sections.
Fourth to sixth:	Enlarged sections showing details of the frustules.

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

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

Sampling date 12/2025. Scale bars indicate 50 µm (1), 10 µm (3).

Three images.

First:	Complete frustule.
Second and third:	Close-up views of the valves. Interestingly, the valve bristles can have different structures within a single cell, ranging from needle-shaped to paddle-shaped.

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

Tescan Clara SEM, © Wolfgang Bettighofer/Jürgen Stampfl.

Sampling date 12/2025. Scale bars indicate 2 µm (1), 1 µm (2), 200 nm (3).

Three images.

First:	This close-up shows the seam between the valve and the girdle band. The hole types of the valve and girdle band are different.
Second and third:	Detailed images of the C-shaped openings through the valve.

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

Tescan Clara SEM, © Wolfgang Bettighofer/Jürgen Stampfl.

Sampling date 12/2025. Scale bars indicate 10 µm (1), 2 µm, (2), 1 µm (3), 2 µm (4).

Four images.

First:	A triangular-shaped Valve (Ditylum brightwellii forma trigonum) with shovel-shaped projections.
Second and third:	Detailed images of the C-shaped openings through the valve.
Fourth:	Close-up of a small part of the shovel-shaped brush ring.

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

Tescan Clara SEM, © Wolfgang Bettighofer/Jürgen Stampfl.

Sampling date 12/2025. Scale bars indicate 100 µm (1), 50 µm (2).

Two images of Ditylum brightwellii forma trigonum.

First:	View into a Petri dish through a stereomicroscope.
Second:	The same cell under the microscope. Planapo 20*/0.8, DIC, DOF image.

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

(1) Stereo microscope Olympus SZX16/Planapo 2.0x, camera Olympus OM-D M5 MKII. DOF image.

(2) Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF image.

Sampling date 04/2017. Scale bars indicate 50 µm.

Four images.

First:	Synoptic representation of the frustule.
Second:	The same cell in cross section.
Third:	Cell shortly after a binary fission.
Fourth:	Two mature cells, resulting from cell division, are connected at their labiate processes by a gelatinous junction.

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.

© 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 Ditylum brightwellii

New items

New items