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
       1 Family Nostocaceae Eichler (1886) see Family Nostocaceae Eichler 1886
       2 Family Rivulariaceae Frank (1886) see Family Rivulariaceae Frank 1886
       3 Family Microchaetaceae Lemmermann (1907) see Family Rivulariaceae Frank (1886)
       4 Family Scytonemataceae A.B.Frank (1886) see Family Scytonemataceae corrig. Frank 1886