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 "Firmicutes" (Gibbons and Murray 1978) Garrity and Holt 2001 stat. inval. see Phylum Bacillota Gibbons and Murray 2021
       Class Clostridia Rainey 2010
         Order Thermoanaerobacterales Wiegel 2010
           Family Thermodesulfobiaceae Mori et al. 2004
             1 Genus Coprothermobacter Rainey and Stackebrandt 1993
             2 Genus Thermodesulfobium Mori et al. 2004