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" Garrity et al. 2001 nom. ined.] see Class Clostridia Rainey 2010
                   [Order "Thermoanaerobacterales" Wiegel, 2010] see Order Thermoanaerobacterales Wiegel 2010
                     2 [Family "Thermoanaerobacteraceae"ᵀ Wiegel, 2010] see Family Thermoanaerobacteraceae Wiegel 2010