[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 Prochloraceae Lewin (1977), nom. inval. see Family Prochloraceae Lewin ex Florenzano, Balloni & Materassi (1986), nom. inval.
       Genus Prochlorococcus Chisholm, Frankel, Goericke, Olson, Palenik, Waterbury, West-Johnsrud & Zettler (1992), nom. inval. see Genus Prochlorococcus Chisholm, Frankel, Goericke, Olson, Palenik, Waterbury, West–Johnsrud & Zettler (2020)