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 Nostocaceae Eichler (1886) see Family Nostocaceae Eichler 1886
         01 Genus "Anabaena" Bory ex Bornet & Flahault (1886), nom. cons. see Genus Anabaena Bory ex Bornet and Flahault 1886 nom. cons.
         02 Genus Anabaena Bory ex Bornet & Flahault (1886), nom. cons. see Genus Anabaena Bory ex Bornet and Flahault 1886 nom. cons.
         03 Genus Anabaenopsis V.V.Mill. (1923) see Genus Anabaenopsis Miller 1923
         04 Genus Cyanospira G. Florenz., Sili, Pelosi & Vincenzini (1985), nom. nud. see Genus Cyanospira G. Florenz., Sili, Pelosi & Vincenzini (2015), nom. illeg.
         05 Genus Aphanizomenon C. Morren ex Bornet & Flahault (1886) see Genus Aphanizomenon Morren ex Bornet and Flahault 1886
         06 Genus Aulosira O. Kirchner ex Bornet & Flahault (1886) see Genus Aulosira Kirchner ex Bornet and Flahault 1886
         07 Genus Cylindrospermopsis G. Seenayya & N. Subba Raju (1972) see Genus Raphidiopsis Fritsch and Rich 1929
         08 Genus Cylindrospermum Kütz. ex Bornet & Flahault (1886) see Genus Cylindrospermum Kützing ex Bornet and Flahault 1886
         09 Form genus Hydrocoryne H.S. Schwabe ex Bornet & Flahault (1886) see Genus Hydrocoryne Schwabe ex Bornet and Flahault 1886
         10 Form genus Isocystis Borzì ex Bornet & Flahault (1886) see Genus Isocystis Borzì ex Bornet and Flahault 1886
         11 Genus Nodularia Mert. ex Bornet & Flahault (1886), nom. cons. see Genus Nodularia Mertens ex Bornet and Flahault 1886 nom. cons.
         12 Genus Nostoc Vaucher ex Bornet & Flahault (1886) see Genus Nostoc Vaucher ex Bornet and Flahault 1886
         13 Genus Raphidiopsis F.E. Fritsch & F. Rich (1929) see Genus Raphidiopsis Fritsch and Rich 1929
         14 Genus Richelia J. Schmidt (1901) see Genus Richelia Schmidt 1901
         15 Genus Trichormus (J. Ralfs ex Bornet & Flahault) Komárek & Anagn. (1989) see Genus Trichormus (Ralfs ex Bornet and Flahault 1886) Komárek and Anagnostidis 1989
         16 Form genus Wollea Bornet & Flahault (1886) see Genus Wollea Bornet and Flahault 1886