Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 - cyanobacteria
   Subgroup Chroococcacean
     1 Genus Synechococcus C. Nägeli (1849)
     2 Genus Synechocystis C. Sauvageau 1892 [ICBN]
     3 Genus Chamaesiphon A.Braun in L. Rabenh. 1865 [ICBN]
     4 Genus Gloeobacter Rippka, Waterbury & Cohen-Baz. (1974)
     5 Genus Gloeothece C. Nägeli 1849 [ICBN]
     6 Genus Microcystis Lemmerm. (1907), nom. cons.
     7 Genus Aphanothece C. Nägeli 1849 nom. cons.