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 stat. inval.
       Division Bacteria Murray 1974 nom. vernac. see Domain Bacteria Woese et al. 1990 stat. inval.
         "Gram-negative facultatively anaerobic rods"
           Family Enterobacteriaceae Rahn 1937 nom. cons. (Approved Lists 1980)
             01 Genus Arizona Kauffmann and Edwards 1952 nom. nud.
             02 Genus Citrobacter Werkman and Gillen 1932 (Approved Lists 1980)
             03 Genus Edwardsiella Ewing and McWhorter 1965 (Approved Lists 1980)
             04 Genus Enterobacter Hormaeche and Edwards 1960 nom. cons. (Approved Lists 1980)
             05 Genus Erwinia Winslow et al. 1920 (Approved Lists 1980)
             06 Genus Escherichia Castellani and Chalmers 1919 nom. cons. (Approved Lists 1980)
             07 Genus Hafnia Møller 1954 (Approved Lists 1980)
             08 Genus Klebsiella Trevisan 1885 (Approved Lists 1980) nom. cons.
             09 Genus Proteus Hauser 1885 (Approved Lists 1980) nom. cons.
             10 Genus Providencia Ewing 1962 (Approved Lists 1980)
             11 Genus Salmonella Lignieres 1900 (Approved Lists 1980)
             12 Genus Serratia Bizio 1823 (Approved Lists 1980)
             13 Genus Shigella Castellani and Chalmers 1919 (Approved Lists 1980)
             14 Genus Yersinia van Loghem 1944 (Approved Lists 1980)