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 Borzinemataceae L. Geitler (1942) see Family Borzinemataceae Geitler 1942 1 Form genus Borzinema G.De Toni (1936) see Genus Borzinema De Toni 1936 2 Form genus Handeliella Skuja (1937) see Genus Handeliella Skuja 1937 3 Form genus Schmidleinema G.De Toni (1936) see Genus Schmidleinema De Toni 1936 4 Form genus Seguenzaea Borzì (1907) see Genus Seguenzaea Borzì 1907 5 Form genus Spelaeopogon Borzì (1907) see Genus Spelaeopogon Borzì 1907