Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 stat. inval. - cyanobacteria see Phylum Cyanobacteriota Oren et al. 2022 Subgroup Chroococcacean Genus Synechocystis C. Sauvageau (1893) see Genus Synechocystis Sauvageau 1893