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MarBEF Data System |
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WoRMS taxon details
basis of record
Guiry, M.D. & Guiry, G.M. (2024). AlgaeBase. <em>World-wide electronic publication, National University of Ireland, Galway.</em> searched on YYYY-MM-DD., available online at http://www.algaebase.org [details]
From editor or global species database
LSID urn:lsid:algaebase.org:taxname:104714 [details]From regional or thematic species database
Description Trichomes free-floating in freshwater plankton, solitary, straight or slightly coiled, constricted at the cross-walls, with indistinct mucilaginous envelopes (faculta-tive?), not attenuated towards ends, or very exceptionally in old trichomes with 2-3 terminal cells slightly narrower than other vegetative cells. Cells shortly bar¬rel-shaped, blue-green with numerous dark aerotopes in cells, (3.2) 4-10 (13) x (7.7) 8-15 μm; end cells spherical and rounded. Heterocytes intercalary, solitary, rounded, nearly spherical, rarely slightly oval, (8) 9.4-15 (16) μm in diameter. Akinetes intercalary, solitary or (less frequently) in pairs or up to 3 in a row, distant from heterocytes, oval to long-oval or wide cylindrical with rounded ends and colourless exospore, 15-37 x 9-21 μm. [details]
Harmful effect Anatoxin-a discovered in pure bloom in Sardinia, Italy by Bruno et al. (1994). Anatoxin-a and cylindrospermopsin have been related to this species by Park et al. (1993) and Briand et al. (2008). [details]
Identification According to sequencing related to coiled D. circinale and D. crassum. Variability is not very wide, the shape of mature akinetes varies from oval to cylindrical. [details]
Remark Heterocysts, nitrogen fixing filamentous form [details]
From editor or global species database
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