Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 stat. inval. - cyanobacteria see Phylum Cyanobacteriota Oren et al. 2022 Subgroup Oscillatorian Genus Phormidium Kütz. ex Gomont (1892) see Genus Phormidium Kützing ex Gomont 1892