Procaryotic Genera
   Domain "Bacteria" Woese et al. 1990
     Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 [monotypic] - cyanobacteria
       Class "Cyanobacteria" Cavalier-Smith, 2002
         Subsection II
           1 Family I see Family Family 2.1 nom. inval.
           2 Family II see Family Family 2.2 nom. inval.