Diatoms – SAR-Stramenopiles (Bacillariophyta)

Observations on Gyrosigma acuminatum

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Gyrosigma acuminatum (Kützing) Rabenhorst 1853

Most likely ID: n.a.

Basionym: Frustulia acuminata Kützing 1833

Add’l Synonyms: Sigmatella acuta Kützing 1832
                              Sigmatella acuminata (Kützing) Brébisson & Godey 1835
                              Navicula acuminata (Kützing) Kützing 1844
                              Navicula spenceri Bailey ex Quekett 1848
                              Pleurosigma acuminatum (Kützing) W.Smith 1852
                        Pleurosigma spenceri (Bailey ex Quekett) W.Smith 1852
                        Gyrosigma spenceri (Bailey ex Quekett) Griffith & Henfrey 1856
                        Gyrosigma spenceri (W.Smith) Griffith & Henfrey 1856
                        Pleurosigma gracilentum Rabenhorst 1861
                        Scalptrum spenceri (Quekett) Kuntze 1891

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Sampling date 07/2019. Scale bars indicate 50 µm.

Two images. Specimen in valvar view.
First: Focus is on epivalve.
Second: Optical cross-section showing chloroplasts and nucleus in the center of the cell.

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Place name: Pond Domänental near Kronshagen (Kiel, Germany)
Latitude: 54.33211 Longitude: 10.060821

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

Sampling date 10/2018. Scale bar indicates 50 µm.

Cell in valvar view with optical transversal cut showing the nucleus and chloroplasts.

Place name: Hiddensee Bodden (Germany)
Latitude: 54.582633 Longitude: 13.115051

Microscope Zeiss Universal, camera Olympus OM-D M5 MKII.

© 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 Gyrosigma acuminatum

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