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 Stigonemataceae Borzì (1892), nom. cons. see Family Stigonemataceae corrig. (Agardh ex Bornet and Flahault 1886) Borzì 1892 nom. cons.
         1 Form genus Cyanobotrys L. Hoffmann (1991), nom. illeg. see Genus Cyanobotrys Hoffmann 1991 nom. illeg.
         2 Form genus Homoeoptyche H. Skuja (1944) see Genus Homoeoptyche Skuja 1944
         3 Form genus Pulvinularia Borzì (1916) see Genus Pulvinularia Borzì 1916
         4 Genus Stigonema C.Agardh ex Bornet & Flahault (1886) see Genus Stigonema Agardh ex Bornet and Flahault 1886