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
     Infrakingdom Glycobacteria Cavalier-Smith 2002 see Domain Bacteria Woese et al. 1990
       Division Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 see Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002
         Subdivision Phycobacteria Cavalier-Smith 2002 see Subphylum Phycobacteria Cavalier-Smith 2002
           Class Hormogoneae Cavalier-Smith 2002 - filamentous cyanobacteria see Subclass Nostocophycideae
             1 Order Nostocales Cavalier-Smith 2002 nom. rej. see Order Nostocales Borzì (1914)
             2 Order Stigonematales (ex Geitler 1925) Cavalier-Smith 2002 nom. rej. see Order Nostocales Cavalier-Smith 2002 nom. rej.