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 Eubacteriales Buchanan 1917 (Approved Lists 1980)
                     Family Christensenellaceae Morotomi et al. 2012
                       1 Genus Catabacter Lau et al. 2014 [monotypic]
                       2 Genus Christensenellaᵀ Morotomi et al. 2012 [monotypic]
                       3 Genus Gehongia Liu et al. 2022
                       4 Genus Guopingia Liu et al. 2022
                       5 Genus Luoshenia Liu et al. 2022
                       6 Genus "Beduinibacterium" Traore et al. 2017 nom. inval.
                       7 Genus "Candidatus Scybalosoma" Gilroy et al. 2022