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
             Phylum Vulcanimicrobiota Yabe et al. 2024, incertae sedis
               Class "Candidatus Xenobiia" corrig. Ji et al. 2022 [monotypic]
                 Order "Candidatus Xenobiales"ᵀ Ji et al. 2022 [monotypic]
                   Family "Candidatus Xenobiaceae"ᵀ Ji et al. 2022
                     1 Genus "Candidatus Bruticola" Ji et al. 2022
                     2 Genus "Candidatus Xenobium"ᵀ Ji et al. 2022