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 "Proteobacteria" Craig et al. 2010
               Phylum "Acidithiobacillia" [monotypic]
                 Class Acidithiobacilliaᵀ Williams and Kelly 2013 [monotypic]
                   Order Acidithiobacillalesᵀ Garrity et al. 2005
                     Family Thermithiobacillaceae Garrity et al. 2005 [monotypic]
                       Genus Thermithiobacillusᵀ Kelly and Wood 2000 [monotypic]
                         1 Thermithiobacillus tepidariusᵀ (Wood and Kelly 1985) Kelly and Wood 2000