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
                 Class Desulfobulbia Waite et al. 2020 [monotypic]
                   Order Desulfobulbalesᵀ Waite et al. 2020
                     1 Family Desulfobulbaceaeᵀ Kuever et al. 2006
                     2 Family Desulfocapsaceae Waite et al. 2020
                     3 Family Desulfurivibrionaceae Waite et al. 2020
                     4 Family Thiovibrionaceae Aronson et al. 2023 [monotypic]