Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 2024
             Kingdom Pseudomonadati (Gibbons and Murray 1978) Oren and Göker 2024
               Phylum Pseudomonadotaᵀ Garrity et al. 2021
                 Class Gammaproteobacteriaᵀ Garrity et al. 2005
                   Order Chromatiales Imhoff 2005
                     01 Family Chromatiaceaeᵀ Bavendamm 1924 (Approved Lists 1980)
                     02 Family Ectothiorhodospiraceae Imhoff 1984
                     03 Family Granulosicoccaceae Lee et al. 2008
                     04 Family Halorhodospiraceae Imhoff et al. 2023
                     05 Family Halothiobacillaceae Kelly and Wood 2005
                     06 Family Sedimenticolaceae Slobodkina et al. 2024
                     07 Family Thioalkalibacteraceae Boden 2017
                     08 Family Thioalkalispiraceae Mori et al. 2011
                     09 Family Thioprofundaceae Kojima et al. 2017
                     10 Family Wenzhouxiangellaceae Wang et al. 2015
                     11 Family Woeseiaceae Du et al. 2016
                     12 Family "Aquichromatiaceae" Yang et al. 2017 nom. inval. [monotypic]
                     13 Family "Candidatus Poriferisulfidaceae" Chuvochina et al. 2023 nom. pro-inval. [monotypic]