Domain Bacteria Woese et al. 1990
   Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005
     Class "Gammaproteobacteria" nom. inval. see Class Gammaproteobacteria Garrity et al. 2005
       Order "Aeromonadales" Garrity and Holt 2001 nom. nud. see Order Aeromonadales Martin-Carnahan and Joseph 2005
         Family Succinivibrionaceae Hippe et al. 1999
           Genus Anaerobiospirillum Davis et al. 1976 (Approved Lists 1980)
           Genus Ruminobacter (ex Sijpesteijn 1949) Stackebrandt and Hippe 1987
           Genus Succinimonas Bryant et al. 1958 (Approved Lists 1980)
           1 Genus Succinivibrio Bryant and Small 1956 (Approved Lists 1980)