Class Cyanoprokaryota Komárek & Golubić 1990 nom. nud. - cyanoprokaryotes
   Subclass Oscillatoriophycidae Hoffmann, Komárek & Kaštovský (2005), nom. inval.
     Order Chroococcales Ardissone (1887) see Order Chroococcales corrig. Ardissone 1887
       Family Microcystaceae Elenkin (1933) see Family Microcystaceae Elenkin 1933
         Genus Microcystis Lemmerm. (1907), nom. cons. see Genus Microcystis Kützing ex Lemmermann 1907 nom. cons.