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 Acidithiobacillaceaeᵀ Garrity et al. 2005 [monotypic]
                       Genus Acidithiobacillusᵀ Kelly and Wood 2000
                         1 Acidithiobacillus albertensis corrig. (Bryant et al. 1988) Kelly and Wood 2000
                         2 Acidithiobacillus caldus (Hallberg and Lindström 1995) Kelly and Wood 2000
                         3 Acidithiobacillus ferridurans Hedrich and Johnson 2013
                         4 Acidithiobacillus ferrivorans Hallberg et al. 2010
                         5 Acidithiobacillus ferrooxidans (Temple and Colmer 1951) Kelly and Wood 2000
                         6 Acidithiobacillus thiooxidans (Waksman and Joffe 1922) Kelly and Wood 2000