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 Xenococcaceae Ercegović (1932) see Family Hydrococcaceae Kützing 1843
         1 Genus Chroococcidiopsis L. Geitler (1933) see Genus Chroococcidiopsis Geitler 1933
         2 Form genus Chroococcopsis L. Geitler (1925) see Genus Chroococcopsis Geitler 1925
         3 Genus Myxosarcina H. Printz (1921) see Genus Myxosarcina Printz 1921
         4 Genus Xenococcus G. Thuret (1880) see Genus Xenococcus Thuret 1880
         5 Form genus Xenotholos Gold-Morgan, Montejano & Komárek (1994) see Genus Xenotholos Gold-Morgan et al. 1994