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 Hydrococcaceae Kützing (1843) see Family Hydrococcaceae Kützing 1843
         01 Form genus Chroococcidium L. Geitler (1933) see Genus Chroococcidium Geitler 1933
         02 Form genus Cyanoderma Weber-van Bosse (1887) see Genus Cyanoderma Weber-van Bosse 1887
         03 Form genus Cyanosaccus K.J. Lukas & S. Golubić (1981) see Genus Cyanosaccus Lukas and Golubić 1981
         04 Form genus Dalmatella A. Ercegović (1929) see Genus Dalmatella Ercegović 1929
         05 Form genus Ercegovicia G. De Toni (1936) see Genus Brachynema Ercegović 1931
         06 Form genus Hydrococcus Kütz. (1833), nom. cons. prop. see Genus Hydrococcus Kützing 1833 nom. cons.
         07 Form genus Hyella Bornet & Flahault (1888) see Genus Hyella Bornet and Flahault 1888
         08 Form genus Myxohyella L. Geitler (1925) see Genus Myxohyella Geitler 1925
         09 Form genus Pascherinema G.De Toni (1936) see Genus Endonema Pascher 1929
         10 Genus Pleurocapsa Thur. (1885) see Genus Pleurocapsa Thuret 1885
         11 Form genus Podocapsa A. Ércegovic (1931), nom. illeg. see Genus Hydropodocapsa E.A. Molinari-Novoa & M.D. Guiry (2021)
         12 Form genus Radaisia C. Sauvageau (1895) see Genus Radaisia Sauvageau 1895
         13 Form genus Solentia A. Ercegović (1927) see Genus Solentia Ercegović 1927