Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum Terrabacteria Battistuzzi et al. 2004
               Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
                 Class Clostridia Rainey 2010
                   Order Thermoanaerobacterales Wiegel 2010
                     Family Thermodesulfobiaceae Mori et al. 2004
                       Genus Coprothermobacter Rainey and Stackebrandt 1993
                         Coprothermobacter proteolyticusᵀ (Ollivier et al. 1985) Rainey and Stackebrandt 1993