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 Form genus Chroococcopsis L. Geitler (1925) see Genus Chroococcopsis Geitler 1925