prokaryotes - bacteria see Domain Bacteria Woese et al. 1990 stat. inval.
   Domain "Bacteria" Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum "Thermodesulfobacteria" Garrity and Holt 2002 stat. inval. [monotypic] see Phylum Thermodesulfobacteriota Garrity and Holt 2021
       Class Thermodesulfobacteria Hatchikian et al. 2002 [monotypic]
         Order Thermodesulfobacteriales Hatchikian et al. 2002 [monotypic]
           Family Thermodesulfobacteriaceae Hatchikian et al. 2002
             1 Genus Caldimicrobium Miroshnichenko et al. 2009
             2 Genus Thermodesulfatator Moussard et al. 2004
             3 Genus Thermodesulfobacterium Zeikus et al. 1995
             4 Genus Thermosulfurimonas Slobodkin et al. 2012