Procaryotic Genera
   Domain "Bacteria" Woese et al. 1990
     Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
       Class "Clostridia" Garrity et al. 2001 nom. ined. see Class Clostridia Rainey 2010
         Order "Thermoanaerobacteriales" [monotypic] see Order Thermoanaerobacterales Wiegel, 2010
           Family "Thermoanaerobacteriaceae" see Family Thermoanaerobacteraceae Wiegel, 2010
             1 Genus Thermoanaerobacterium Lee et al. 1993
             2 Genus Ammonifex Huber and Stetter 1996
             3 Genus Carboxydobrachium see Genus Carboxydibrachium corrig. Sokolova et al. 2001
             4 Genus Coprothermobacter Rainey and Stackebrandt 1993
             5 Genus Moorella Collins et al. 1994 nom. illeg.
             6 Genus Sporotomaculum Brauman et al. 1998
             7 Genus Thermacetogenium Hattori et al. 2000
             8 Genus Thermoanaerobacter Wiegel and Ljungdahl 1982
             9 Genus Thermoanaerobium Zeikus et al. 1983 see Genus Thermoanaerobacter Wiegel and Ljungdahl 1982