living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Prokaryotae see Superkingdom Prokarya
     Kingdom Monera Haeckel 1866 see Domain Bacteria Woese et al. 1990
       Division Bacteria (Haeckel 1894) see Domain Bacteria Woese et al. 1990
         "Gram-negative anaerobic bacteria"
           Family Bacteroidaceae Pribram 1933 (Approved Lists 1980)
             01 Genus Bacteroides Castellani and Chalmers 1919 (Approved Lists 1980)
             02 Genus Fusobacterium Knorr 1922 (Approved Lists 1980)
             03 Genus Leptotrichia Trevisan 1879 (Approved Lists 1980)
             04 Genus Desulfomonas Moore et al. 1976 (Approved Lists 1980) see Genus Desulfovibrio Kluyver and van Niel 1936 (Approved Lists 1980)
             05 Genus Desulfovibrio Kluyver and van Niel 1936 (Approved Lists 1980)
             06 Genus Butyrivibrio Bryant and Small 1956 (Approved Lists 1980)
             07 Genus Succinivibrio Bryant and Small 1956 (Approved Lists 1980)
             08 Genus Succinomonas see Genus Succinimonas Bryant et al. 1958 (Approved Lists 1980)
             09 Genus Lachnospira Bryant and Small 1956 (Approved Lists 1980)
             10 Genus Selenomonas von Prowazek 1913 (Approved Lists 1980)