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 Clostridia Rainey 2010
                   Order Natranaerobiales Mesbah et al. 2007
                     Family Natranaerobiaceaeᵀ Mesbah et al. 2007
                       Genus Natranaerobiusᵀ Mesbah et al. 2007
                         1 Natranaerobius thermophilusᵀ Mesbah et al. 2007
                         2 Natranaerobius trueperi Mesbah and Wiegel 2009