[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990
     Phylum "Proteobacteria" Garrity et al. 2005 see Superphylum Proteobacteria Craig et al. 2010
       Class Deltaproteobacteria Kuever et al. 2006
         Order Syntrophobacterales Kuever et al. 2006
           Family Syntrophaceae Kuever et al. 2006
             1 Genus Syntrophus Mountfort et al. 1984
             2 Genus Desulfobacca Oude Elferink et al. 1999
             3 Genus Desulfomonile DeWeerd et al. 1991
             4 Genus Smithella Liu et al. 1999