Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
   Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 stat. inval. - cyanobacteria see Phylum Cyanobacteriota Oren et al. 2022
     Class "Cyanobacteria" "Stanier 1974" nom. inval. see Class Chroococcophyceae Hollerbach et al. 1953
       Subsection I see Family Family 1.1 nom. inval.
         Form genus Chamaesiphon A.Braun (1864) see Genus Chamaesiphon Braun 1864
         Form genus Chroococcus C. Nägeli (1849) see Genus Chroococcus Nägeli 1849
         Form genus Cyanobacterium Rippka & Cohen-Baz. (1983), nom. inval. see Genus Cyanobacterium Rippka & Cohen-Baz. (2022)
         Form genus Cyanobium Rippka & Cohen-Baz. (1983), nom. inval. see Genus Cyanobium Rippka and Cohen-Bazire 1983 nom. inval.
         Form genus Cyanothece Komárek (1976) see Genus Cyanothece Komárek 1976
         Form genus Dactylococcopsis A. Hansgirg (1888) see Genus Dactylococcopsis Hansgirg 1888
         Form genus Gloeobacter Rippka, Waterbury & Cohen-Baz. (1974), nom. inval. see Genus Gloeobacter Rippka, Waterbury & Cohen-Baz. (2013)
         Form genus Gloeocapsa Kütz. (1843), nom. cons. see Genus Gloeocapsa Kützing 1843 nom. cons.
         Form genus Gloeothece C. Nägeli (1849), nom. cons. see Genus Gloeothece Nägeli 1849 nom. cons.
         Form genus Microcystis Lemmerm. (1907), nom. cons. see Genus Microcystis Kützing ex Lemmermann 1907 nom. cons.
         Form genus Prochlorococcus Chisholm et al. 1992 nom. inval. see Genus Prochlorococcus Chisholm et al. 2001 nom. inval.
         Form genus Prochloron (ex Lewin 1977) Florenzano et al. 1986 nom. inval. see Genus Prochloron Lewin ex Hoffmann and Greuter 1993
         Form genus Synechococcus C. Nägeli (1849) see Genus Synechococcus Nägeli 1849
         Form genus Synechocystis C. Sauvageau (1893) see Genus Synechocystis Sauvageau 1893