Class Cyanoprokaryota Komárek & Golubić 1990 nom. nud. - cyanoprokaryotes Subclass Oscillatoriophycidae Hoffmann, Komárek & Kaštovský (2005), nom. inval. Order Oscillatoriales Schaffner (1922) see Order Oscillatoriales Schaffner 1922 Family Phormidiaceae Anagn. & Komárek (1988) see Family Oscillatoriaceae Engl. (1898), nom. cons. Form genus Pseudophormidium (A. Forti) Anagn. & Komárek (1988) see Genus Pseudophormidium (Forti 1907) Anagnostidis and Komárek 1988