Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum "Proteobacteria" Craig et al. 2010
               Phylum "Gammaproteobacteria" Garrity et al., 2005 [monotypic]
                 Class Gammaproteobacteriaᵀ Garrity et al. 2005
                   Order Chromatiales Imhoff 2005
                     Family Ectothiorhodospiraceae Imhoff 1984
                       Genus Acidihalobacter Pablo et al. 2015
                       Genus Thioalbus Park et al. 2011
                       Genus Thiogranum Mori et al. 2015
                       01 Genus Ectothiorhodospiraᵀ Pelsh 1936 (Approved Lists 1980)
                       02 Genus Alkalilimnicola corrig. Yakimov et al. 2001
                       03 Genus Alkalispirillum Rijkenberg et al. 2002 [monotypic]
                       04 Genus Aquisalimonas Márquez et al. 2007
                       05 Genus Arhodomonas Adkins et al. 1993
                       06 Genus Ectothiorhodosinus Gorlenko et al. 2007 [monotypic]
                       07 Genus Halorhodospira Imhoff and Süling 1997
                       08 Genus Natronocella Sorokin et al. 2007 [monotypic]
                       09 Genus Nitrococcus Watson and Waterbury 1971 (Approved Lists 1980) [monotypic]
                       10 Genus Oceanococcus Li et al. 2014 [monotypic]
                       11 Genus Thioalkalivibrio Sorokin et al. 2001
                       12 Genus Thiohalospira Sorokin et al. 2008
                       13 Genus Thiorhodospira Bryantseva et al. 1999 [monotypic]