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 Scytonemataceae A.B.Frank (1886) see Family Scytonemataceae corrig. Frank 1886
         Form genus Kyrtuthrix Ercegović (1929) see Genus Kyrtuthrix Ercegović 1929