Diatoms – SAR-Stramenopiles (Bacillariophyta)

Observations on Rhoicosphenia abbreviata

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Rhoicosphenia abbreviata (C.Agardh) Lange-Bertalot 1980

Most likely ID: n.a.

Basionym: Gomphonema abbreviatum C.Agardh 1831

Add’l Synonyms: Gomphonema rotundatum Ehrenberg 1830
                       Gomphonema curvatum Kützing 1833
                       Rhoicosphenia curvata (Kützing) Grunow 1860
                       Rhoicosphenia curvata var. major Cleve 1895
                         Rhoicosphenia curvata var. subacuta M.Schmidt 1899
                       Gomphonema augur var. rotundatum (Ehrenberg) Playfair 1914
                       Gomphonema rotundatum Ehrenberg 1830
                       Rhoicosphenia curvata var. genuina A.Cleve 1953

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Sampling date 10/2011. Scale bars indicate 10 µm.

Two images.

First:	Rhoicosphenia abbreviata living as epibiont on red alga Ceramium. Scale bar indicates 10 µm.
Second:	Rhoicosphenia abbreviata living as epibiont on red alga Ceramium together with Cocconeis. Scale bar indicates 10 µm.

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

Microscope Zeiss Universal, camera Olympus C7070WZ. DOF images.

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Sampling date 10/2009. Scale bars indicate 10 µm.

Three images.

First:	Rhoicosphenia abbreviata is a tiny araphid desmid living attached on substratum by a jelly stalk.
Second:	The substratum here is the red alga Polysiphonia fibrillosa. The other epibionts are Cocconeis and a filamentous colony of the cyanobacteria Pseudanabaena.
Third:	Rhoicosphenia abbreviata living as epibiont on red alga Polysiphonia fibrillosa together with Cocconeis and filamentous colonies of the cyanobacteria. The fine filaments belong to genus Pseudanabaena, and the wider filament inserting on the stalk of Rhoicosphenia belongs to genus Homeothrix.

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

Microscope Zeiss Universal, camera Olympus C7070WZ. DOF images.

© Wolfgang Bettighofer,
images under Creative Commons License V 3.0 (CC BY-NC-SA).
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Observations on Rhoicosphenia abbreviata

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