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
           Family Ectothiorhodospiraceae Imhoff 1984
             1 Genus Ectothiorhodospira Pelsh 1936 (Approved Lists 1980)
             2 Genus Arhodomonas Adkins et al. 1993
             3 Genus Halorhodospira Imhoff and Süling 1997
             4 Genus Nitrococcus Watson and Waterbury 1971 (Approved Lists 1980)
             5 Genus Thiorhodospira Bryantseva et al. 1999