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
         Form genus Radiocystis H. Skuja (1948) see Genus Radiocystis Skuja 1948