[Class] Cyanobacteria "Stanier (1974)", nom. inval. - cyanoprokaryotes see Class Cyanophyceae Hauck (1885)
   Order Chroococcales Ardissone (1887) [paraphyletic] see Order Chroococcales corrig. Ardissone 1887
     1 Family Microcystaceae Elenkin (1933) see Family Microcystaceae Elenkin 1933
     2 Family Aphanothecaceae Komárek, J. Kaštovský, J. Mareš & J.R.Johans. (2014) see Family Microcystaceae Elenkin (1933)
     3 Family Cyanobacteriaceae Komárek, J. Kaštovský, J. Mareš & J.R.Johans. (2014), nom. inval. [monotypic] see Family Geminocystaceae Tuji, Yamaguchi & Niiyama (2021)
     4 Family Cyanothrichaceae Elenkin (1947), nom. illeg., orth. inval. [monotypic] see Family Cyanotrichaceae Elenkin (1947), nom. illeg.
     5 Family Gomphosphaeriaceae Elenkin (1933) see Family Gomphosphaeriaceae Elenkin 1933
     6 Family Chroococcaceae Nägeli (1849) see Family Chroococcaceae Nägeli 1849
     7 Family Stichosiphonaceae Hoffmann, Komárek & Kaštovský (2005), nom. nud. see Family Stichosiphonaceae Hoffmann et al. 2005 nom. nud.
     8 Family Entophysalidaceae Geitler (1925) see Family Chroococcaceae Nägeli (1849)