[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum "Proteobacteria" Garrity et al. 2005 stat. inval. see Phylum Pseudomonadota Garrity et al. 2021
       Class Deltaproteobacteria Kuever et al. 2006
         Order Syntrophobacterales Kuever et al. 2006
           Family Syntrophobacteraceae Kuever et al. 2006
             Genus Syntrophobacter Boone and Bryant 1984
               1 Syntrophobacter wolinii Boone and Bryant 1984
               2 Syntrophobacter fumaroxidans Harmsen et al. 1998
               3 Syntrophobacter pfennigii Wallrabenstein et al. 1996
               4 Syntrophobacter sulfatireducens Chen et al. 2005