oxyphototroph prokaryotes - bacteria see Domain Bacteria Woese et al. 1990 stat. inval.
   Class Cyanoprokaryota Komárek & Golubić 1990 nom. nud. - cyanoprokaryotes
     Order Stigonematales Geitler (1925) see Order Nostocales Borzì (1914)
       Family Nostochopsaceae Geitler (1925) see Family Hapalosiphonaceae Elenkin (1917), nom. cons.
         Form genus Baradlaia P. Palik (1960) see Genus Baradlaia Palik 1960