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)
       1 Family Mastigocladaceae Geitler (1925) see Family Hapalosiphonaceae Elenkin (1917), nom. cons.
       2 Family Loriellaceae Geitler (1925) see Family Hapalosiphonaceae Elenkin 1917
       3 Family Nostochopsaceae Geitler (1925) see Family Hapalosiphonaceae Elenkin (1917), nom. cons.
       4 Family Borzinemataceae L. Geitler (1942) see Family Borzinemataceae Geitler 1942
       5 Family Capsosiraceae L. Geitler (1925) see Family Capsosiraceae Geitler 1925
       6 Family Chlorogloeopsaceae (A.K. Mitra) A.K. Mitra & D.C. Pandey (1967) see Family Chlorogloeopsidaceae Mitra & Pandey (1967)
       7 Family Stigonemataceae Borzì (1892), nom. cons. see Family Stigonemataceae corrig. (Agardh ex Bornet and Flahault 1886) Borzì 1892 nom. cons.
       8 Family Fischerellaceae Anagnostidis & Komárek (1990) see Family Hapalosiphonaceae Elenkin (1917), nom. cons.