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 Loriellaceae Geitler (1925) see Family Hapalosiphonaceae Elenkin 1917
         Form genus Loefgrenia Gomont (1896) see Genus Loefgrenia Gomont 1896