Procaryotic Genera
   Domain "Bacteria" Woese et al. 1990
     Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 [monotypic] - cyanobacteria
       Class "Cyanobacteria" Cavalier-Smith, 2002
         Subsection V [monotypic]
           Family I
             1 Form genus Chlorogloeopsis A.K. Mitra & D.C. Pandey 1967 [ICBN]
             2 Form genus Fischerella (E. Bornet & C. Flahault) M. Gomont (1895)
             3 Form genus Geitleria Friedmann 1955 [ICBN]
             4 Form genus Iyengariella Desikachary 1953 [ICBN]
             5 Form genus Nostochopsis Wood ex Bornet & Flahault 1886 [ICBN]
             6 Form genus Stigonema C.Agardh ex Bornet & Flahault (1887)