Name: Hafnia Møller 1954 (Approved Lists 1980)

Category: Genus

Proposed as: gen. nov.

Etymology: Haf.ni.a. L. fem. n. Hafnia, the old name for Copenhagen [probably better: Hafniella]

Gender: feminine (stem: Hafni-)

Type species: Hafnia alvei Møller 1954 (Approved Lists 1980)

Conduct genome-based taxonomy of genus at TYGS

16S rRNA gene: Analyse FASTA

Effective publication: Moller V. Distribution of amino acid decarboxylases in Enterobacteriaceae. Acta Pathol Microbiol Scand 1954; 35:259-277.

IJSEM list: Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 2

• Notes:
  • 🥇 Nomenclatural type of the family Hafniaceae Adeolu et al. 2016. Publication: Adeolu M, Alnajar S, Naushad S, S Gupta R. 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 2016; 66:5575-5599.
  • 🧕 Boone et al. (2001) assigned this genus to the family Enterobacteriaceae Rahn 1937 (Approved Lists 1980). Publication: Garrity GM, Holt JG. The Road Map to the Manual. In: Boone DR, Castenholz RW, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, second edition, vol. 1 (The Archaea and the deeply branching and phototrophic Bacteria), Springer-Verlag, New York, 2001, p. 119-166.
  • 🙄 This taxon name is occasionally misprinted (or affected by an OCR error) in some sources as: "Habnia"; "Hafhia"; "Hafiia"; "Hafinia"; "Hajnia"; "Hofnia"; "Hufnia".
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Holmes B, Farmer Iii JJ. International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of Enterobacteriaceae. Minutes of the meetings, 7 August 2008, Istanbul, Turkey. Int. J. Syst. Evol. Microbiol. 2009; 59:2643-2645.
  • 🎰 The BRCs most frequently used for deposits in this group are: ATCC: 2; JCM: 2; LMG: 2; CCUG: 1; NRRL: 1; NBIMCC: 1; NCTC: 1; CIP: 1; DSM: 1; CGMCC: 1.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 2, note = "Animal classification RG: 2 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 2".
  • 🧍 Pittman et al. (1991) suggested the abbreviation "HAFN" for this genus name but this does not appear to be of practical relevance any longer. Publication: Pittman KF, Walczak CA, Lock CM. Codes and abbreviations for approved of effectively published names of genera of bacteria published from January 1980 to December 1990. Int J Syst Bacteriol 1991; 41:571-579.
  • 🧍 Despite close phenotypic similarities, there are at least two distinct DNA-DNA hybridisation groups (HG) in Hafnia. The type strain (ATCC 13337 = NCTC 8105) falls in Group 1 (along with reference strain ATCC 29926), leaving Group 2 (containing strain ATCC 29927) unnamed. Similarly, there are two groups within Obesumbacterium proteus; these are separable by biochemical characters and DNA-DNA hybridisation. However, despite having distinct phenotypic differences, Obesumbacterium proteus group 1 (type strain ATCC 12841) is 75% related to DNA group 1 of Hafnia alvei (though only 52% related to DNA group 2 of Hafnia alvei); these two organisms are thus a single species, Hafnia alvei. This leaves two separate unnamed groups (Hafnia alvei HG2 and Obesumbacterium proteus HG2) that are not closely related. Publication: Holmes B, Farmer Iii JJ. International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of Enterobacteriaceae. Minutes of the meetings, 7 August 2008, Istanbul, Turkey. Int. J. Syst. Evol. Microbiol. 2009; 59:2643-2645.
  • 🧍 Despite close phenotypic similarities, there are at least two distinct DNA-DNA hybridisation groups (HG) in Hafnia. The type strain (ATCC 13337 NCTC 8105) falls in Group 1 (along with reference strain ATCC 29926), leaving Group 2 (containing strain ATCC 29927) unnamed. Similarly, there are two groups within Obesumbacterium proteus; these are separable by biochemical characters and DNA-DNA hybridisation. However, despite having distinct phenotypic differences, Obesumbacterium proteus group 1 (type strain ATCC 12841) is 75% related to DNA group 1 of Hafnia alvei (though only 52% related to DNA group 2 of Hafnia alvei); these two organisms are thus a single species, Hafnia alvei. This leaves two separate unnamed groups (Hafnia alvei HG2 and Obesumbacterium proteus HG2) that are not closely related. In April 2010, Priest and Barker validly publish the name Shimwellia pseudoproteus for Obesumbacterium proteus HG2 strains. In July 2010, Huys et al. validly publish the name Hafnia paralvei for Hafnia alvei HG2 strains. Publication: Priest FG, Barker M. Gram-negative bacteria associated with brewery yeasts: reclassification of Obesumbacterium proteus biogroup 2 as Shimwellia pseudoproteus gen. nov., sp. nov., and transfer of Escherichia blattae to Shimwellia blattae comb. nov. Int J Syst Evol Microbiol 2010; 60:828-833.

Subdivision:

Number of child taxa with a validly published and correct name: 3
Number of child taxa with a validly published name, including synonyms: 3
Total number of child taxa: 4

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Hafnia alvei Møller 1954 (Approved Lists 1980)	validly published under the ICNP	correct name
    Hafnia paralvei Huys et al. 2010	validly published under the ICNP	correct name
    "Hafnia protea" Priest et al. 1973	not validly published	preferred name (not correct name)
    Hafnia psychrotolerans Gu et al. 2015	validly published under the ICNP	correct name

Parent taxon: Hafniaceae Adeolu et al. 2016

Assigned by: Adeolu M, Alnajar S, Naushad S, S Gupta R. 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 2016; 66:5575-5599.

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Record number: 515741