Procaryotic Genera
   Domain "Bacteria" Woese et al. 1990
     Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 [monotypic] - cyanobacteria
       Class "Cyanobacteria" Cavalier-Smith, 2002
         1 Subsection I [monotypic] see Family Family 1.1 nom. inval.
         2 Subsection II
         3 Subsection III [monotypic] see Family Family 3.1 nom. inval.
         4 Subsection IV
         5 Subsection V [monotypic]