procaryotes
   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" "Garrity and Holt 2001" nom. nud. see Class Clostridia Rainey 2010
         Order Clostridiales Prévot 1953 (Approved Lists 1980) see Order Eubacteriales Buchanan 1917 (Approved Lists 1980)
           Family Syntrophomonadaceae Zhao et al. 1993
             01 Genus Syntrophomonas McInerney et al. 1982
             02 Genus Acetogenium Leigh and Wolfe 1983 see Genus Thermoanaerobacterium Lee et al. 1993
             03 Genus Aminobacterium Baena et al. 1999
             04 Genus Aminomonas Baena et al. 1999
             05 Genus Anaerobaculum Rees et al. 1997 see Genus Acetomicrobium Soutschek et al. 1985
             06 Genus Anaerobranca Engle et al. 1995
             07 Genus Caldicellulosiruptor Rainey et al. 1995
             08 Genus Dethiosulfovibrio Magot et al. 1997
             09 Genus Syntrophospora Zhao et al. 1990
             10 Genus Thermaerobacter Takai et al. 1999
             11 Genus Thermanaerovibrio Baena et al. 1999
             12 Genus Thermohydrogenium Zacharova et al. 1996
             13 Genus Thermosyntropha Svetlitshnyi et al. 1996