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 "Candidatus Hydrogenedentota" corrig. Rinke et al. 2023, incertae sedis [monotypic]
               1 Class "Candidatus Hydrogenedentia"ᵀ Chuvochina et al. 2023 nom. pro-inval. [monotypic]