Cyanobacterium (genus)

Cyanobacterium is a genus of cyanobacteria. Unusual for cyanobacteria, it is published under the International Code of Nomenclature of Prokaryotes (with a living-culture type specimen). It became a validly published name in 2022.^[2]

Cyanobacterium
Scientific classification
Domain:	Bacteria
Kingdom:	Bacillati
Phylum:	Cyanobacteriota
Class:	Cyanophyceae
Order:	Chroococcales
Family:	Cyanobacteriaceae Komárek et al. 2014[1]
Genus:	Cyanobacterium Rippka & Cohen-Bazire 1983 [validated 2022]
Species
Cyanobacterium stanieri "Cyanobacterium aponinum"

It contains one validly-published species, the type species Cyanobacterium stanieri.^[2] There is an effectively (but not validly) published "Cyanobacterium aponinum" Moro et al. 2007.^[3]

GTDB splits Cyanobacterium stanieri into two species-sized clusters and reports three more unnamed species clusters in its understanding of Cyanobacterium. The "Cyanobacterium aponinum PCC 10605" RefSeq genome GCF_000317675.1 is assigned to different genus with a placeholder name, PCC-10605, under GTDB's version of Cyanobacteriaceae.^[4] GTDB's version of the Cyanobacteriaceae also includes Geminocystis and two more placeholder genera.^[5]