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 Loriellaceae Geitler (1925) see Family Hapalosiphonaceae Elenkin 1917 Form genus Colteronema Copel. (1936) see Genus Colteronema Copeland 1936