Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 stat. inval. - cyanobacteria see Phylum Cyanobacteriota Oren et al. 2022 1 Subgroup Chroococcacean 2 Subgroup Pleurocapsalean 3 Subgroup Oscillatorian 4 Subgroup Nostocacean 5 Subgroup Rivularean 6 Subgroup Stigonematalean 7 Genus Aphanocapsa Nägeli (1849), incertae sedis see Genus Aphanocapsa Nägeli 1849 8 Genus Cylindrospermum Kütz. ex Bornet & Flahault (1886), incertae sedis see Genus Cylindrospermum Kützing ex Bornet and Flahault 1886