[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990
     Phylum "Proteobacteria" Garrity et al. 2005 see Superphylum Proteobacteria Craig et al. 2010
       Class Gammaproteobacteria Garrity et al. 2005
         Order Acidithiobacillales Garrity et al. 2005
           Family Acidithiobacillaceae Garrity et al. 2005
             Genus Acidithiobacillus Kelly and Wood 2000
               1 Acidithiobacillus thiooxidans (Waksman and Joffe 1922) Kelly and Wood 2000
               2 Acidithiobacillus albertensis corrig. (Bryant et al. 1988) Kelly and Wood 2000
               3 Acidithiobacillus caldus (Hallberg and Lindström 1995) Kelly and Wood 2000
               4 Acidithiobacillus ferrooxidans (Temple and Colmer 1951) Kelly and Wood 2000