Home / Diatoms / Centric / Unicells/ Arachnodiscus |
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Name derivation: |
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‘Spider disk’ – Arachno- (L>) = spider, the radiating spokes and position of circular ridges on the valve face conjures a spider web, especially in the case of A. ornatus. A variant in the genus spelling is ‘Arachnoidiscus’(Ehrenburg 1849). Hemiptychus ornatus (Ehrenburg 1848) may take preference. Why would Ehrenburg describe the same organism with different generic names – and in two consecutive years! See online. |
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Classification: |
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Arachnodiscus J.W.Bailey ex Ehrenberg 1849. There is only 1 species currently accepted. Order Arachnoidiscales; Family Arachnoidiscaceae |
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Morphology: |
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Habitat: |
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References: |
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Ehrenberg, C.G. 1849. Weitere Mittheilung über Resultate bei Anwendung des chromatisch-polarisirten Lichtes für mikroskopische Verhältnisse. Bericht über die zur Bekanntmachung geeigneten Verhandlungen der Königlich-Preussischen Akademie der Wissenschaften zu Berlin 1849: 55-76. Guiry, M.D. and G.M. Guiry 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 10 September 2013. |
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