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 Tissierellales Alauzet et al. 2020
                     1 Family Acidilutibacteraceae Fan et al. 2023 [monotypic]
                     2 Family Dethiosulfatibacteraceae Chuvochina et al. 2024 [monotypic]
                     3 Family Gottschalkiaceae Poehlein et al. 2017
                     4 Family Peptoniphilaceae Johnson et al. 2014
                     5 Family Sedimentibacteraceae Chuvochina et al. 2024 [monotypic]
                     6 Family Sporanaerobacteraceae Fan et al. 2023
                     7 Family Thermohalobacteraceae Spring 2021
                     8 Family Tissierellaceaeᵀ Wu et al. 2020