Cyanothamnos G.Cronberg, 1991

Holotype species: Cyanothamnos plancticus G.Cronberg

Original publication and holotype designation: Cronberg, G. (1991). Cyanothamnos plancticus gen. et sp. nov., a new colonial cyanophyte from an eutrophic Scanian lake, Sweden. Arkiv für Hydrobiologie/Algological Studies 75(Suppl. Vol. 64): 61-70.

Description: Unicellular-colonial; colorless, free-floating, in outline irregularly spherical up to 55 _m diam., composed of irregular and irregularly branched rows of elongated cells, radiating from the center of a colony and irregularly, densely ramified; colony appearance like a densely branched shrub with radially oriented branches. Rows of cells enveloped by very thin, colorless and diffluent mucilage, overlapping sometimes end cells in a form of thin mucilaginous strings; wide gelatinous envelopes missing. Cells cylindrical, rodlike with mostly cut or slightly rounded ends, straight or slightly bent, with pale green, not granular content, without prominent granules and aerotopes; end cells rounded or sometimes rounded-pointed. Common branching arises by a shift of a cell from the original position in the radial row of cells and by a following cell division in a new direction. Cell division only crosswise, perpendicular to the long axis of a cell. Reproduction by dissociation of colonies. The type species is freshwater, planktonic, still known only from one eutrophic lake in S. Sweden.

Information contributed by: J. Komárek. The most recent alteration to this page was made on 2023-03-02 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Gender: This genus name is currently treated as masculine.

Most recent taxonomic treatment adopted: Strunecký, O., Ivanova, A.P. & Mares, J. (2022 '2023'). An updated classification of cyanobacterial orders and families based on phylogenomic and polyphasic analysis (Review). Journal of Phycology 59(1): 12-51.

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Contributors
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=44865

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 02 March 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 25 April 2024