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. This was to avoid the confusion that would be generated by renaming the order to "Escherichiales"; in contrast, the name "Enterobacteriales" remains a commonly used synonym for the order. In addition, several new families within the Enterobacterales were proposed, consisting of species that were formerly members of the Enterobacteriaceae.[1] The Thorselliaceae may also be considered a member of this order.[5]


Phylogeny of Enterobacterales









Phylogeny of the Enterobacterales as proposed in 2016.[1] Note that the Thorselliaceae are not included. 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)
  • Scandinavium (2019)


  1. ^ a b c Adeolu, M.; et al. (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". Int. J. Syst. Evol. Microbiol.
  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
  5. ^ Kämpfer, P; Glaeser, SP; Nilsson, LKJ; Eberhard, T; Håkansson, S; Guy, L; Roos, S; Busse, HJ; Terenius, O (2015). "Proposal of Thorsellia kenyensis sp. nov. and Thorsellia kandunguensis sp. nov., isolated from the larvae of Anopheles arabiensis as members of the family Thorselliaceae fam. nov". Int J Syst Evol Microbiol. 65 (Pt 2): 444–451. doi:10.1099/ijs.0.070292-0. PMID 25385997.