[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
       Genus Romeriaᵀ M. Koczwara (1932) see Genus Romeria Koczwara 1932