[living organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Prokaryota
     Kingdom Bacteria Cavalier-Smith 2002 - bacteria see Domain Bacteria Woese et al. 1990
       Subkingdom Negibacteria Cavalier-Smith 2002 - negibacteria see Domain Bacteria Woese et al. 1990
         Phylum Thermodesulfobacteria Garrity and Holt 2001 [monotypic] see Phylum Deltaproteobacteria Kuever et al., 2006
           Class Thermodesulfobacteria Hatchikian et al. 2002 [monotypic]
             Order Thermodesulfobacteriales Hatchikian et al. 2002