Procaryotic Genera
   Domain "Bacteria" Woese et al. 1990
     Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005
       Class "Gammaproteobacteria" nom. inval. see Class Gammaproteobacteria Garrity et al. 2005
         Order "Chromatiales" Garrity et al. 2001 nom. ined. see Order Chromatiales Imhoff 2005
           1 Family Chromatiaceae Bavendamm 1924 (Approved Lists 1980)
           2 Family Ectothiorhodospiraceae Imhoff 1984