oxyphototroph prokaryotes - bacteria see Domain Bacteria Woese et al. 1990 stat. inval.
   Class Cyanoprokaryota Komárek & Golubić 1990 nom. nud. - cyanoprokaryotes
     Order Nostocales Borzì (1914) see Order Nostocales corrig. Borzì 1914
       Family Nostocaceae Eichler (1886) see Family Nostocaceae Eichler 1886
         Subfamily Nostocoideae see Family Nostocaceae Eichler (1886)
           1 Form genus Aulosira O. Kirchner ex Bornet & Flahault (1886) see Genus Aulosira Kirchner ex Bornet and Flahault 1886
           2 Form genus Isocystis Borzì ex Bornet & Flahault (1886) see Genus Isocystis Borzì ex Bornet and Flahault 1886
           3 Genus Nodularia Mert. ex Bornet & Flahault (1886), nom. cons. see Genus Nodularia Mertens ex Bornet and Flahault 1886 nom. cons.
           4 Genus Nostoc Vaucher ex Bornet & Flahault (1886) see Genus Nostoc Vaucher ex Bornet and Flahault 1886
           5 Genus Trichormus (J. Ralfs ex Bornet & Flahault) Komárek & Anagn. (1989) see Genus Trichormus (Ralfs ex Bornet and Flahault 1886) Komárek and Anagnostidis 1989