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Home / Cyanobacteria / Filaments / Unbranched / Untapered / No_heterocysts / Visible_sheath / Hydrocoleum |
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Name derivation: |
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Classification: |
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Hydrocoleum glutinosum (C.Agardh) Gomont; 11 of 42 species descriptions are currently accepted taxonomically (Guiry andGuiry 2013). Synonym: Blennothrix Kützing ex Anagnostidis & Komárek 1988 Order Oscillatoriales; Family Oscillatoriaceae
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Morphology: |
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Trichome lacking heterocysts, not tapered, and having a sheath extending beyond the end of the trichomes and frequently containing fascicles (bundles) of many filaments (trichome + sheath) that are usually gliding inside sheath.
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Similar genera: |
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Microcoleus has a similar habit, several parallel and gliding trichomes inside a common sheath.
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Toxins: |
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The first report of toxicity in marine cyanobacteria was a report of homoanatoxin-a (HANTX), a neurotoxin, found in marine mats of Hydrocoleum in Lifou (Loyalty Islands, New Caledonia) during an outbreak of ciguatera fish poisoning generally attributed to the dinoflagellate Gambierdiscus spp. Giant clam intoxication was also present. (Méjean et al. 2010).
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Habitat: |
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Forms benthic mats prolifically in tropical marine habitats and in freshwater flowing water – springs and streams. |
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References: |
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Gomont, M. (1890). Essai de classification des Nostocacées homocystées. Journal de Botanique, Paris 4: 349-357. Guiry, M.D. and G.M. Guiry, 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 06 March 2013 Méjean, A., C. Peyraud-Thomas, A.S. Kerbrat, S. Golubic, S. Pauillac, M. Chinain and D. Laurent 2010. First identification of the neurotoxin homoanatoxin-a from mats of Hydrocoleum lyngbyaceum (marine cayanobacterium) possibly linked to giant clam poisoning in New Caledonia. Toxicon 56(5):829-835. |
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