living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Prokaryotae see Superkingdom Prokarya
     Kingdom Monera Haeckel 1866 see Domain Bacteria Woese et al. 1990
       Division Bacteria (Haeckel 1894) see Domain Bacteria Woese et al. 1990
         "Gram-negative, chemolithotrophic bacteria"
           "Organisms Metabolizing Sulfur"
             1 Genus Thiobacillus Beijerinck 1904 (Approved Lists 1980)
             2 Genus Sulfolobus Brock et al. 1972 (Approved Lists 1980)
             3 Genus Thiobacterium (ex Janke 1924) La Riviere and Kuenen 1989
             4 Genus Macromonas Utermöhl and Koppe 1924 (Approved Lists 1980)
             5 Genus Thiovulum Hinze 1913 (Approved Lists 1980)
             6 Genus Thiospira Visloukh 1914 (Approved Lists 1980)