Diatoms – SAR-Stramenopiles (Bacillariophyta)

Observations on Thalassiosira punctigera

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Thalassiosira punctigera (Castracane) Hasle 1983

Most likely ID: n.a.

Basionym: Ethmodiscus punctiger Castracane 1886

Add’l Synonyms: Ethmodiscus japonicus Castracane 1886
                       Coscinodiscus punctiger (Castracane) H.Peragallo 1889
                       Coscinodiscus angstii Gran 1931
                       Thalassiosira japonica Kisselev 1931
                       Thalassiosira angstii (Gran) Makarova 1971

Sampling date 04/2011. Scale bars indicate 50 µm.

Two images.

First:	The image shows numerous chitinous spines (typical for Thalassiosirales) which minimize their sedimentation speed.
Second:	The oblique view exhibits short silicous spines, the so called occluded processes. Some chitinous spines protruding from the fultoportulae (also called strutted processes) along the dotted valve margin are also visible.

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 bars indicate 25 µm (1), 50 µm (2), 25 µm (3).

Three images.

First:	The image shows numerous chitinous spines (typical for Thalassiosirales) which minimize their sedimentation speed.
Second:	The oblique view exhibits short silicous spines, the so called occluded processes. On the lower left, lower right and central above chitinous spines are visible.
Third:	The oblique view exhibits short silicous spines, the so called occluded processes. On the lower left near the scale bar a chitinous spine is visible.

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 01/2018. Scale bar indicates 50 µm.

Thalassiosira punctigera (left) accompanied by Thalassiosira angulata.

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 image.

© 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 Thalassiosira punctigera

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