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 Bacteroidota Krieg et al. 2021
                 Order "Candidatus Sulfidibacteriales" Leng et al. 2022 nom. nud., incertae sedis [monotypic]
                   1 Genus "Candidatus Sulfidibacterium"ᵀ Leng et al. 2022 nom. pro-inval.