Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum Terrabacteria Battistuzzi et al. 2004
               Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
                 Class Clostridia Rainey 2010
                   Order Clostridialesᵀ Prévot 1953 (Approved Lists 1980)
                     Family Syntrophomonadaceae Zhao et al. 1993
                       Genus Syntrophomonasᵀ McInerney et al. 1982
                         1 Syntrophomonas bryantii (Stieb and Schink 1985) Wu et al. 2006
                         2 Syntrophomonas cellicola Wu et al. 2006
                         3 Syntrophomonas curvata Zhang et al. 2004
                         4 Syntrophomonas erecta Zhang et al. 2005
                         5 Syntrophomonas palmitatica Hatamoto et al. 2007
                         6 Syntrophomonas sapovorans Roy et al. 1987
                         7 Syntrophomonas wolfeiᵀ McInerney et al. 1982
                         8 Syntrophomonas zehnderi Sousa et al. 2007