[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   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 Clostridiales Prévot 1953 (Approved Lists 1980)
           Family Syntrophomonadaceae Zhao et al. 1993
             01 Genus Syntrophomonas McInerney et al. 1982
             01.0 Genus Syntrophospora Zhao et al. 1990 see Genus Syntrophomonas McInerney et al. 1982
             02 Genus Aminobacterium Baena et al. 1999
             03 Genus Aminomonas Baena et al. 1999
             04 Genus Anaerobaculum Rees et al. 1997
             05 Genus Anaerobranca Engle et al. 1995
             06 Genus Caldicellulosiruptor Rainey et al. 1995
             07 Genus Carboxydocella Sokolova et al. 2002
             08 Genus Dethiosulfovibrio Magot et al. 1997
             09 Genus Pelospora Matthies et al. 2000
             10 Genus Syntrophothermus Sekiguchi et al. 2000
             11 Genus Thermaerobacter Takai et al. 1999
             12 Genus Thermanaerovibrio Baena et al. 1999
             13 Genus Thermohydrogenium Zacharova et al. 1996
             14 Genus Thermosyntropha Svetlitshnyi et al. 1996
             15 Genus Thermovirga Dahle and Birkeland 2006