life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Empire Prokaryota (Dougherty 1957) Allsopp 1969 [monotypic] see Domain Bacteria Woese et al. 1990
     Kingdom Bacteria (Cohn 1870) Cavalier-Smith 1983 [paraphyletic] - bacteria see Kingdom Bacteria Cavalier-Smith 2002
       Subkingdom Negibacteria Cavalier-Smith 1987 [paraphyletic?] see Subkingdom Negibacteria Cavalier-Smith 2002
         Infrakingdom Glycobacteria Cavalier-Smith 1998 [paraphyletic?] see Infrakingdom Glycobacteria Cavalier-Smith 2002
           Superphylum Pimelobacteria (Cavalier-Smith 1992) Cavalier-Smith 1998 [paraphyletic?] see Domain Bacteria Woese et al. 1990
             Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005
               Subphylum Thiobacteria Cavalier-Smith 1998 see Phylum Proteobacteria Garrity et al. 2005
                 1 Class "[Deltaproteobacteria]" Garrity et al. 2001 nom. ined. see Class Deltaproteobacteria Kuever et al. 2006
                 2 Class "[Epsilonproteobacteria]" nom. inval. see Class Epsilonproteobacteria Garrity et al. 2006
                 3 Genus Desulfovibrio Kluyver and van Niel 1936 (Approved Lists 1980)
                 4 Genus Thiovulum Hinze 1913 (Approved Lists 1980)
                 5 Genus Bdellovibrio Stolp and Starr 1963 (Approved Lists 1980)
                 6 Myxobacteria see Order Myxococcales Tchan et al. 1948 (Approved Lists 1980)