[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.
     Family Romeriaceae Komárek, J. Kaštovský, J. Mareš & J.R.Johans. (2014) see Family Cymatolegaceae Strunecký and Mareš 2023
       1 Genus Cyanocatenula Joosten (2006) see Genus Cyanocatenula Joosten 2006
       2 Genus Romeriaᵀ M. Koczwara (1932) see Genus Romeria Koczwara 1932
       3 Genus Tubiella M.M. Hollerbach (1935) see Genus Tubiella Hollerbach 1935
       4 Genus Wolskyella G. Claus (1963) see Genus Wolskyella Claus 1963