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 Woeseiaceae Du et al. 2016 [monotypic]
                     1 Family Chromatiaceae Bavendamm 1924 (Approved Lists 1980)
                     2.1 Family Ectothiorhodospiraceae Imhoff 1984
                     2.2 Family Thioalkalispiraceae Mori et al. 2011
                     3 Family Granulosicoccaceae Lee et al. 2008 [monotypic]
                     4 Family Halothiobacillaceae Kelly and Wood 2005