Class Cyanoprokaryota Komárek & Golubić 1990 nom. nud. - cyanoprokaryotes Subclass Nostocophycidae Hoffmann, Komárek & Kaštovský (2005), nom. inval. [monotypic] Order Nostocales Borzì (1914) see Order Nostocales corrig. Borzì 1914 Family "Symphyonemataceae" Hoffmann, Komárek & Kaštovský (2005), nom. inval. see Family Scytonemataceae A.B.Frank (1886) Form genus Brachytrichia G. Zanardini ex Bornet & Flahault (1886) see Genus Brachytrichia Zanardini ex Bornet and Flahault 1886