procaryotes
   Domain Bacteria Woese et al. 1990
     Phylum Thermodesulfobacteria Garrity and Holt 2001 see Phylum Deltaproteobacteria Kuever et al., 2006
       Class Thermodesulfobacteria Hatchikian et al. 2001 nom. inval. see Class Thermodesulfobacteria Hatchikian et al. 2002
         Order Thermodesulfobacteriales Hatchikian et al. 2001 nom. inval. see Order Thermodesulfobacteriales Hatchikian et al. 2002
           1 Family Thermodesulfobacteriaceae Hatchikian et al. 2001 nom. inval. see Family Thermodesulfobacteriaceae Hatchikian et al. 2002