| Introduction | | Search taxa | | Taxon tree | | Taxon match | | Checklist | | Literature | | Stats | | Photogallery | | OBIS Vocab | | Log in |
CaRMS taxon detailsDolichospermum circinale (Rabenhorst ex Bornet & Flahault) P. Wacklin, L. Hoffmann & J. Komárek, 2009
699631 (urn:lsid:marinespecies.org:taxname:699631)
accepted
Species
Not documented
Description Trichomes free-floating, solitary, rarely entangled in small clusters, isopolar, coiled irregularly screw-like or more or...
Description Trichomes free-floating, solitary, rarely entangled in small clusters, isopolar, coiled irregularly screw-like or more or less in regular and circular coils, which are 68–120 µm wide and 25–55 µm high (spirals 1.4–3.2:1), clearly constricted at the cross-walls, not attenuated towards ends, sometimes with mucilaginous envelopes. Cells ± spherical, blue-green or yellowish, with numerous brownish aerotopes, 4–11 × (7) 8–11 µm; apical cells rounded, of the same size and shape as all other cells. Heterocytes spherical or rarely slightly oval, of the same width or slightly larger than vegetative cells, intercalary, solitary, (6.5) 9–12 (13) µm in diameter. Akinetes intercalary, distant from heterocytes, solitary or rarely two together, oval, rarely very slightly asymmetric or with widely conically narrowed ends, (12.5) 20–28 (42) × (9) 15–21 µm. – Loosening of coiling can be observed under culture conditions. Irregular coiling appears usually in poorly developed populations. Gas vesicles can disappear in some cells after long-term cultivation. Transient morphotypes to A. crassa occur in culture. [details] Distribution In plankton of eutrophic waters (stagnant waters and large rivers), often forming heavy water blooms, locally common,...
Distribution In plankton of eutrophic waters (stagnant waters and large rivers), often forming heavy water blooms, locally common, rarely in monospecific populations. Considered cosmopolitan with exception of subpolar regions. Massive populations known mainly from central Europe, subtropical S America and SE Australia (specific identity should be confirmed). From Komarek 2013. [details] LSID urn:lsid:algaebase.org:taxname:104635
LSID urn:lsid:algaebase.org:taxname:104635 [details]
Guiry, M.D. & Guiry, G.M. (2025). AlgaeBase. World-wide electronic publication, National University of Ireland, Galway (taxonomic information republished from AlgaeBase with permission of M.D. Guiry). Dolichospermum circinale (Rabenhorst ex Bornet & Flahault) P. Wacklin, L. Hoffmann & J. Komárek, 2009. Accessed through: Nozères, C., Kennedy, M.K. (Eds.) (2025) Canadian Register of Marine Species at: https://marinespecies.org/carms/aphia.php?p=taxdetails&id=699631 on 2026-07-12
Nozères, C., Kennedy, M.K. (Eds.) (2026). Canadian Register of Marine Species. Dolichospermum circinale (Rabenhorst ex Bornet & Flahault) P. Wacklin, L. Hoffmann & J. Komárek, 2009. Accessed at: https://marinespecies.org/Carms/aphia.php?p=taxdetails&id=699631 on 2026-07-12
Date action by 2015-06-26 12:00:51Z changed db_admin
basis of record
Guiry, M.D. & Guiry, G.M. (2026). 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]
status source Wacklin, P.; Hoffmann, L.; Komárek, J. (2009). Nomenclatural validation of the genetically revised cyanobacterial genus Dolichospermum (RALFS ex BORNET et FLAHAULT) comb. nova. <em>Fottea.</em> 9(1): 59-64., available online at https://doi.org/10.5507/fot.2009.005 [details]   Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Description Trichomes free-floating, solitary, rarely entangled in small clusters, isopolar, coiled irregularly screw-like or more or less in regular and circular coils, which are 68–120 µm wide and 25–55 µm high (spirals 1.4–3.2:1), clearly constricted at the cross-walls, not attenuated towards ends, sometimes with mucilaginous envelopes. Cells ± spherical, blue-green or yellowish, with numerous brownish aerotopes, 4–11 × (7) 8–11 µm; apical cells rounded, of the same size and shape as all other cells. Heterocytes spherical or rarely slightly oval, of the same width or slightly larger than vegetative cells, intercalary, solitary, (6.5) 9–12 (13) µm in diameter. Akinetes intercalary, distant from heterocytes, solitary or rarely two together, oval, rarely very slightly asymmetric or with widely conically narrowed ends, (12.5) 20–28 (42) × (9) 15–21 µm. – Loosening of coiling can be observed under culture conditions. Irregular coiling appears usually in poorly developed populations. Gas vesicles can disappear in some cells after long-term cultivation. Transient morphotypes to A. crassa occur in culture. [details]Distribution In plankton of eutrophic waters (stagnant waters and large rivers), often forming heavy water blooms, locally common, rarely in monospecific populations. Considered cosmopolitan with exception of subpolar regions. Massive populations known mainly from central Europe, subtropical S America and SE Australia (specific identity should be confirmed). From Komarek 2013. [details] Harmful effects and toxins Strains of this species isolated in culture were found to produce anatoxin-a according to Sivonen et al. 1989a. Microcystins according to Vezie et al. 1998. Saxitoxins according to Humpage et al. 1994; Negri et al. 1997; Testé et al. 2002; Pomati et al. 2006. [details] LSID urn:lsid:algaebase.org:taxname:104635 [details] |
