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 Bacillatiᵀ (Gibbons and Murray 1978) Oren and Göker 2024
               Phylum Bacillotaᵀ Gibbons and Murray 2021
                 Class Syntrophomonadia Chuvochina et al. 2024
                   1 Order Syntrophomonadalesᵀ Chuvochina et al. 2024
                   2 Order Thermacetogeniales Chuvochina et al. 2024 [monotypic]