Domain Bacteria Woese et al. 1990
   Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 - cyanobacteria
     Class "Cyanobacteria" Cavalier-Smith, 2002
       Subsection I see Family Family 1.1 nom. inval.
         Form genus Chamaesiphon A.Braun in L. Rabenh. 1865 [ICBN]
         Form genus Chroococcus C. Nägeli 1849 [ICBN]
         Form genus Cyanobacterium R. Rippka & G. Cohen-Bazire 1983 [ICBN]
         Form genus Cyanobium Rippka & Cohen-Bazire 1983 [ICBN]
         Form genus Cyanothece J. Komárek 1976 [ICBN]
         Form genus Dactylococcopsis A. Hansgirg 1888 [ICBN]
         Form genus Gloeobacter Rippka, Waterbury & Cohen-Baz. (1974)
         Form genus Gloeocapsa Kützing 1843 nom. cons. [ICBN]
         Form genus Gloeothece C. Nägeli 1849 [ICBN]
         Form genus Microcystis Lemmerm. (1907), nom. cons.
         Form genus Prochlorococcus Chisholm et al. 1992 see Genus Prochlorococcus Chisholm et al. 2001
         Form genus Prochloron (ex Lewin 1977) Florenzano et al. 1986 see Genus Prochloron R.A. Lewin 1977 [ICBN]
         Form genus Synechococcus C. Nägeli (1849)
         Form genus Synechocystis C. Sauvageau 1892 [ICBN]