Cyanothece Komárek, 1976

Holotype species: Cyanothece aeruginosa (Nägeli) Komárek

Original publication and holotype designation: Komárek, J. (1976). Taxonomic review of the genera Synechocystis Sauv. 1892, Synechococcus Näg. 1849, and Cyanothece gen. nov (Cyanophyceae). Archiv für Protistenkunde 118: 119-179.

Description: Unicellular; cells solitary or in irregular groups, oval, widely oval, ellipsoidal or almost cylindrical with widely rounded ends, mainly longer than 3 _m (up to100 _m long) and (1.8)6-52 _m wide, without mucilage or with very fine and thin gelatinous layer around the cells. Cells with blue-green, olive-green or pinkish up to violet cell content, sometimes with dispersed prominent granules and with keritomized chromatoplasm (especially arranged groups of thylakoids). Cells nonmotile or slightly motile. GC-content of the DNA = approx. 42 mol. percent (acc. to Rippka and Cohen-Bazire 1983, only 2 strains studied). Involution cells irregular. Reproduction by cell division, perpendicular to one (longer) axis of the cell into 2 morphologically identical semiglobular daughter cells, which grow up to the original shape before the next division; the cells divide repeatedly in only one plane in the succeeding generations. In metaphyton of shallow pits, pools, moors, swamps and small lakes with plenty of aquatic plants, rarely secondary in plankton; 2 (and probably more) species occur in saline and hypersaline swamps; few species grow subaerophytically on barks of trees, wet rocks and in humid soils, several only in thermal springs. The majority of species have their limited areas of distribution (in respect of their special ecology). The members with "small" (33.5 _m) cells and the strains studied by Rippka and Cohen-Bazire (1983) belong probably to the genus Cyanobium or to a new genus.

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

Most recent taxonomic treatment adopted: Strunecky, O., Ivanova, A.P. & Mares, J. (2023). An updated classification of cyanobacterial orders and families based on phylogenomic and polyphasic analysis (Review). Journal of Phycology 59(1): [1-40] 12-51.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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.

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M.D. Guiry in Guiry, M.D. & Guiry, G.M. 03 March 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 24 March 2023

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