prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Firmicutes" corrig. Gibbons and Murray 1978 (Approved Lists 1980)
       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