[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 Chamaesiphonaceae Borzì (1878) see Family Chamaesiphonaceae Borzì 1878
       Genus Chamaesiphonopsis F.E. Fritsch (1929) see Genus Chamaesiphon Braun 1864