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 Clostridialesᵀ Prévot 1953 (Approved Lists 1980)] see Order Eubacteriales Buchanan 1917 (Approved Lists 1980)
                     [Family Proteinivoraceae (sic) Kevbrin et al. 2014 [monotypic]] see Family Proteinivoracaceae corrig. Kevbrin et al. 2014