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 Xenotholos Gold-Morgan, Montejano & Komárek (1994) see Genus Xenotholos Gold-Morgan et al. 1994