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HABs taxon detailsDolichospermum sigmoideum (Nygaard) Wacklin, L.Hoffmann & Komárek, 2009
625408 (urn:lsid:marinespecies.org:taxname:625408)
accepted
Species
Not documented
Identification Tendency to formation of ± straight trichomes only in cultures, natural populations are not very variable. In culture the...
Identification Tendency to formation of ± straight trichomes only in cultures, natural populations are not very variable. In culture the length: width ratio of vegetative cells can be highly variable. Often misinterpreted with "Anabaenaflos-aquae", morphological transitions to D. mendotae also exist. Anabaena incrassata Nygaard 1929 likely belongs within the wide variability of this species. [details]
Guiry, M.D. & Guiry, G.M. (2024). AlgaeBase. World-wide electronic publication, National University of Ireland, Galway (taxonomic information republished from AlgaeBase with permission of M.D. Guiry). Dolichospermum sigmoideum (Nygaard) Wacklin, L.Hoffmann & Komárek, 2009. Accessed through: Lundholm, N.; Churro, C.; Escalera, L.; Fraga, S.; Hoppenrath, M.; Iwataki, M.; Larsen, J.; Mertens, K.; Moestrup, Ø.; Murray, S.; Tillmann, U.; Zingone, A. (Eds) (2009 onwards) IOC-UNESCO Taxonomic Reference List of Harmful Micro Algae at: https://www.marinespecies.org/hab/aphia.php?p=taxdetails&id=625408 on 2024-05-04
Lundholm, N.; Churro, C.; Escalera, L.; Fraga, S.; Hoppenrath, M.; Iwataki, M.; Larsen, J.; Mertens, K.; Moestrup, Ø.; Murray, S.; Tillmann, U.; Zingone, A. (Eds) (2009 onwards). IOC-UNESCO Taxonomic Reference List of Harmful Micro Algae. Dolichospermum sigmoideum (Nygaard) Wacklin, L.Hoffmann & Komárek, 2009. Accessed at: https://www.marinespecies.org/hab/aphia.php?p=taxdetails&id=625408 on 2024-05-04
Date action by
basis of record
Guiry, M.D. & Guiry, G.M. (2023). 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]
 Present Inaccurate Introduced: alien Containing type locality
From regional or thematic species database
Description Trichomes free-floating, solitary, or entangled in dense, microscopic clusters, but mostly occurring in short, variously curved fragments of filaments, or irregularly coiled (width of irregular coils mostly 20-37 μm), free-floating, constricted at the cross-walls, not attenuated towards ends. Cells ellipsoid or typical barrel-shaped, usually a little longer than wide, blue-green or yellowish, 4-8.5 x (2.5) 3-4 (5.3) μm; apical cells of the same shape and size as the vegetative cells. Het¬erocytes solitary, intercalary (only after fragmentation occasionally in terminal position), oval, always a little elongated, 5-7.5 x 4-5 (7) μm. Akinetes intercalary, separated from the heterocytes usually by 1-4 cells, solitary, cylindrical with rounded ends, sometimes slightly arcuated, with smooth, colourless exospore, (12) 16-21.5 (27.4?) x (5.7?) 6.8-8.5 μm. [details]Identification Tendency to formation of ± straight trichomes only in cultures, natural populations are not very variable. In culture the length: width ratio of vegetative cells can be highly variable. Often misinterpreted with "Anabaenaflos-aquae", morphological transitions to D. mendotae also exist. Anabaena incrassata Nygaard 1929 likely belongs within the wide variability of this species. [details] |
