Class Cyanoprokaryota Komárek & Golubić 1990 nom. nud. - cyanoprokaryotes 1 Subclass Gloeobacterophycidae Hoffmann, Komárek & Kaštovský (2005), nom. inval. [monotypic] 2 Subclass Synechococcophycidae Hoffmann, Komárek & Kaštovský (2005), nom. inval. 3 Subclass Oscillatoriophycidae Hoffmann, Komárek & Kaštovský (2005), nom. inval. 4 Subclass Nostocophycidae Hoffmann, Komárek & Kaštovský (2005), nom. inval. [monotypic]