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Name derivation: |
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Classification: |
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Sirogonium Kützing 1843; 23 of 29 species descriptions are currently accepted taxonomically (Guiry and Guiry 2013).Order Zygnematales; Family Zygnemataceae
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Molecular sequence: |
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Based on 26 strains of Spirogyra and 7 strains of Sirogonium, large subunit of RUBISCO (rbcL) sequence strongly supports monophyly of both genera. All species descriptions of Spirogyra are in a single clade except S. maxima that falls within the Sirogonium clade (Drummond et al. 2005).
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Morphology: |
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Several ribbon-like chloroplasts per cell, lying parallel to each other, distinguishing the genus from Spirogyra with helical (spiraling) chloroplasts. Lacks the ‘slimy’ (slippery) feel of Spirogyra.
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Similar genera: |
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Spirogyra differs with helical chloroplasts.
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Habitat: |
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Freshwater, widespread, sparse compared to Mougeotia, Spirogyra and Zygnema. |
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References: |
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Drummond, C.S., J. Hall, K.G. Karol, and C.F. Delwiche 2005. Phylogeny of Spirogyra and Sirogonium (Zygnematophyceae) based on rbcL sequence data. Journal of Phycology 41:1055-1064. Guiry, M.D. and G.M. Guiry 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 22 July 2013. Kützing, F.T. 1843. Phycologia generalis oder Anatomie, Physiologie und Systemkunde der Tange... Mit 80 farbig gedruckten Tafeln, gezeichnet und gravirt vom Verfasser. pp. [part 1]: [i]-xxxii, [1]-142, [part 2:] 143-458, 1, err.], pls 1-80. Leipzig: F.A. Brockhaus. |
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