Cyanobacterium Rippka & Cohen-Bazire, 2022

Holotype species: Cyanobacterium stanieri R.Rippka & G.Cohen-Bazire

Original publication and holotype designation: Oren, A., Mareš, J. & Rippka, R. (2022). Validation of the names Cyanobacterium and Cyanobacterium stanieri, and proposal of Cyanobacteriota phyl. nov. International Journal of Systematic and Evolutionary Microbiology 72(10): article 005528 [1-7], 1 fig., 1 table.

Description: Unicellular; cells solitary or in groups, oval, shortly cylindrical or irregularly cylindrical with widely rounded ends, without or with very fine mucilaginous layers around the cells. Cells usually pale blue-green to olive-green, mainly containing phycocyanin, with homogeneous content or with fine, dispersed granules, probably nonmotile, not forming filamentous involution forms. Probably with chromatic adaptation (?). GC-content of the DNA = approx. 39-41 mol. percent. Photoheterotroph. Reproduction by simple binary transverse fission perpendicular to the long axis of the cell. Cells grow into the original size before the next division. The type species was described from culture and based on biochemical characteristics, but further picoplanktonic freshwater and marine species belong probably to this genus, which needs further study, particularly from the point of view of cytomorphology, life cycles, variation range of physiological and morphological characters, and ecology. The "Marine-cluster C of Synechococcus" with oceanic picoplanktonic species (Platt and others (1983), Waterbury (1989), Newman and Carr (1990), Waterbury and others (1979)) belongs probably also to this genus.

Information contributed by: J. Komárek. The most recent alteration to this page was made on 2023-08-25 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 neuter.

Most recent taxonomic treatment adopted: Polyakova, E., Averina, S. & Pinevich, A. (2023). Geminocystis urbisnovae sp. nov. (Chroococcales, Cyanobacteria): polyphasic description complemented with a survey of the family Geminocystaceae. Algae 38(2): 93-110.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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. 25 August 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 24 April 2024

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