[living organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Prokaryota Margulis 1974 nom. nud.
     Kingdom Bacteria Cavalier-Smith 2002 stat. inval. - bacteria see Domain Bacteria Woese et al. 1990 stat. inval.
       Subkingdom Negibacteria Cavalier-Smith 2002 stat. inval. - negibacteria see Domain Bacteria Woese et al. 1990 stat. inval.
         Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 stat. inval. - cyanobacteria see Phylum Cyanobacteriota Oren et al. 2022
           Class Cyanophyceae Hauck (1885) see Class Chroococcophyceae Hollerbach et al. 1953
             1 Order Chroococcales Ardissone (1887) see Order Chroococcales corrig. Ardissone 1887
             2 Order Nostocales Borzì (1914) see Order Nostocales corrig. Borzì 1914
             3 Order Oscillatoriales Schaffner (1922) see Order Oscillatoriales Schaffner 1922
             4 Order Pseudanabaenales L. Hoffm., Komárek & Kaštovský (2005), nom. inval. see Order Pseudanabaenales Hoffmann et al. 2005 nom. nud.
             5 Order Synechococcales Hoffmann, Komárek & Kaštovský (2005), nom. inval. see Order Synechococcales Hoffmann et al. 2005 nom. nud.