[Class] Cyanobacteria "Stanier (1974)", nom. inval. - cyanoprokaryotes see Class Cyanophyceae Hauck (1885)
   Order Synechococcales Hoffmann, Komárek & Kaštovský (2005), nom. inval. [paraphyletic] see Order Synechococcales Hoffmann et al. 2005 nom. nud.
     01 Family Synechococcaceae Komárek & Anagn. (1995) see Family Synechococcaceae Komárek and Anagnostidis 1995
     02 Family Merismopediaceae Elenkin (1933) see Family Microcystaceae Elenkin 1933
     03 Family Prochloraceae Lewin (1977), nom. inval. see Family Prochloraceae Lewin ex Florenzano, Balloni & Materassi (1986), nom. inval.
     04 Family Coelosphaeriaceae Elenkin (1933) see Family Microcystaceae Elenkin 1933
     05 Family Acaryochloridaceae Komárek, Kaštovský, Mareš & Johansen (2014), nom. inval. [monotypic] see Family Acaryochloridaceae Komárek et al. 2014 nom. inval.
     06 Family Chamaesiphonaceae Borzì (1878) see Family Chamaesiphonaceae Borzì 1878
     07 Family Romeriaceae Komárek, J. Kaštovský, J. Mareš & J.R.Johans. (2014) see Family Cymatolegaceae Strunecký and Mareš 2023
     08 Family Pseudanabaenaceae Anagn. & Komárek (1988) see Family Pseudanabaenaceae Anagnostidis and Komárek 1988
     09 Family Leptolyngbyaceae Komárek, J. Kaštovský, J. Mareš & J.R.Johans. (2014) see Family Leptolyngbyaceae (Anagnostidis and Komárek 1988) Komárek et al. 2014
     10 Family Heteroleibleiniaceae Komárek, J. Kaštovský, J. Mareš & J.R.Johans. (2014) see Family Heteroleibleiniaceae (Komárek and Anagnostidis 2005) Komárek et al. 2014
     11 Family Schizotrichaceae Elenkin (1949) see Family Schizotrichaceae Elenkin 1949