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 Halanaerobiales corrig. Rainey and Zhilina 1995
                     1 Genus Anoxybacter Zeng et al. 2015, incertae sedis
                     2 Genus "Candidatus Natronospora" Sorokin et al. 2025 nom. pro-inval., incertae sedis
                     3 Family Halanaerobiaceaeᵀ corrig. Oren et al. 1984
                     4 Family Halobacteroidaceae Zhilina and Rainey 1995