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
         1 Form genus Kyrtuthrix Ercegović (1929) see Genus Kyrtuthrix Ercegović 1929
         2 Genus Scytonema C.Agardh ex Bornet & Flahault (1886) see Genus Scytonema Agardh ex Bornet and Flahault 1886
         3 Form genus Scytonematopsis E.I. Kiseleva (1930) see Genus Scytonematopsis Kiseleva 1930
         4 Genus Spirirestis Flechtner & J.R.Johans. (2002) see Genus Spirirestis Flechtner and Johansen 2002