Enterobacterales with its type genus Enterobacter is an order of Gram-negative bacteria.[1]

Citrobacter freundii.jpg
Citrobacter freundii, one member of the order
Scientific classification e
Domain: Bacteria
Phylum: Proteobacteria
Class: Gammaproteobacteria
Order: Enterobacterales
Adeolu et al., 2016
  • Enterobacteriales

Historical identification and systematicsEdit

Enterobacterales was proposed in 2005 under the name "Enterobacteriales". However, the name "Enterobacteriales" was not validated, thus it lacked standing in nomenclature, so the name should be written in parentheses. "Enterobacteriales" was a monotypic order, containing only the family Enterobacteriaceae, and shared its type genus Escherichia.[2][3][4]

In 2016, "Enterobacteriales" was proposed to be reclassified as Enterobacterales, and the type genus changed to Enterobacter. In addition, several new families within the Enterobacterales were proposed, consisting of species that were formerly members of the Enterobacteriaceae.[1]


Phylogeny of Enterobacterales

Pasteurellales (outgroup)









Phylogeny of the Enterobacterales as proposed in 2016.[1] Pasteurellales is used as the outgroup.

Validly published generaEdit

The following genera have been validly published, thus they have "Standing in Nomenclature". The year the genus was proposed is listed in parentheses after the genus name.

Candidatus generaEdit

Proposed, but have not obtained standing in nomenclatureEdit

  • Aquamonas (2009)
  • Aranicola (1997)
  • Atlantibacter (2016)
  • Averyella (2005)
  • Grimontella (2003)
  • Guhaiyinggella (1995)
  • Margalefia (2004)
  • Tiedjeia (2005)


  1. ^ a b c Adeolu, M; Alnajar, S; Naushad, S; S Gupta, R (December 2016). "Genome-based phylogeny and taxonomy of the 'Enterobacteriales': proposal for Enterobacterales ord. nov. divided into the families Enterobacteriaceae, Erwiniaceae fam. nov., Pectobacteriaceae fam. nov., Yersiniaceae fam. nov., Hafniaceae fam. nov., Morganellaceae fam. nov., and Budviciaceae fam. nov". International Journal of Systematic and Evolutionary Microbiology. 66 (12): 5575–5599. doi:10.1099/ijsem.0.001485. PMID 27620848.
  2. ^ Zipcodezoo site Enterobacteriales Archived 2014-04-27 at the Wayback Machine accessed 9 Mar 2013
  3. ^ NCBI Enterobacterales accessed 9 Mar 2013
  4. ^ Taxonomicon Enterobacteriales accessed 9 Mar 2013