[living organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Prokaryota
     Kingdom Bacteria Cavalier-Smith 2002 - bacteria see Domain Bacteria Woese et al. 1990
       Subkingdom Negibacteria Cavalier-Smith 2002 - negibacteria see Domain Bacteria Woese et al. 1990
         Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 - cyanobacteria
           Class Cyanophyceae Schaffner (1909) see Class Cyanobacteria Cavalier-Smith, 2002
             1 Order Chroococcales Wettst. (1924)
             2 Order Nostocales Borzì (1914)
             3 Order Oscillatoriales Elenkin (1934)
             4 Order Pseudanabaenales L. Hoffm., Komárek & Kaštovský (2005)
             5 Order Synechococcales