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 Thermodesulfobacteriota Garrity and Holt 2021
                 01 Genus Thermosulfuriphilus Slobodkina et al. 2017, incertae sedis
                 02 Genus "Qingjiangonema" Cui et al. 2024 nom. inval., incertae sedis
                 03 Class Deferrisomatia Waite et al. 2020 [monotypic]
                 04 Class Desulfarculia Waite et al. 2020
                 05 Class Desulfobaccia Waite et al. 2020 [monotypic]
                 06 Class Desulfobacteria Waite et al. 2020
                 07 Class Desulfobulbia Waite et al. 2020 [monotypic]
                 08 Class Desulfomonilia Waite et al. 2020 [monotypic]
                 09 Class Desulfovibrionia Waite et al. 2020 [monotypic]
                 10 Class Desulfuromonadia Waite et al. 2020
                 11 Class Dissulfuribacteria Waite et al. 2020 [monotypic]
                 12 Class Syntrophia Waite et al. 2020 [monotypic]
                 13 Class Syntrophobacteria Waite et al. 2020 [monotypic]
                 14 Class Syntrophorhabdia Waite et al. 2020 [monotypic]
                 15 Class Thermodesulfobacteriaᵀ Hatchikian et al. 2002 [monotypic]
                 16 Class "Candidatus Anaeroferrophilia" corrig. Murphy et al. 2022 [monotypic]
                 17 Class "Candidatus Anaeropigmentatia" corrig. Murphy et al. 2022 [monotypic]
                 18 Class "Candidatus Desulfofervidia" Waite et al. 2020 [monotypic]
                 19 Class "Candidatus Zymogenia" Murphy et al. 2022 [monotypic]
                 20 Class "Candidatus Desulfocorpusculia" Slobodkina et al. 2025 nom. pro-inval. [monotypic]