Name: Aureobacterium liquefaciens (ex Orla-Jensen 1919) Collins et al. 1983

Category: Species

Proposed as: sp. nov., nom. rev.

Etymology: li.que.fa’ci.ens. N.L. neut. part. adj. liquefaciens, dissolving

Pronunciation, gender: li-kwe-FA-ki-ens, neuter

Type strain: DSM 20638; IMET 11374; NCIB 11509; NCIMB 11509

Conduct genome-based taxonomy at

16S rRNA gene: X77444 Analyse FASTA

Effective publication: Collins MD, Jones D, Keddie RM, Kroppenstedt RM, Schleifer KH. Classification of some coryneform bacteria in a new genus Aureobacterium. Syst Appl Microbiol 1983; 4:236-252.

IJSEM list: Anonymous. Validation list no. 11. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1983; 33:672-674.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym (and not recommended for medical use)

Correct name: Microbacterium liquefaciens (Collins et al. 1983 ex Orla-Jensen 1919) Takeuchi and Hatano 1998

Risk group: 2

• Synonyms:

  • Name	Kind
    Microbacterium liquefaciens (Collins et al. 1983 ex Orla-Jensen 1919) Takeuchi and Hatano 1998	homotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus Aureobacterium Collins et al. 1983. Publication: Collins MD, Jones D, Keddie RM, Kroppenstedt RM, Schleifer KH. Classification of some coryneform bacteria in a new genus Aureobacterium. Syst Appl Microbiol 1983; 4:236-252.
  • ⏰ According to Lee et al. (2023), this species is an earlier heterotypic synonym of Microbacterium marinotypicum (ZoBell and Upham 1944) Takeuchi and Hatano 1998 but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Lee SD, Yang HL, Kim IS. Four new Microbacterium species isolated from seaweeds and reclassification of five Microbacterium species with a proposal of Paramicrobacterium gen. nov. under a genome-based framework of the genus Microbacterium. Front Microbiol 2023; 14:1299950.
  • ⏰ According to Lee et al. (2023), this species is an earlier heterotypic synonym of Microbacterium maritypicum corrig. (ZoBell and Upham 1944) Takeuchi and Hatano 1998 but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Lee SD, Yang HL, Kim IS. Four new Microbacterium species isolated from seaweeds and reclassification of five Microbacterium species with a proposal of Paramicrobacterium gen. nov. under a genome-based framework of the genus Microbacterium. Front Microbiol 2023; 14:1299950.
  • ⏰ According to Lee et al. (2023), this species is an earlier heterotypic synonym of Flavobacterium marinotypicum ZoBell and Upham 1944 (Approved Lists 1980) but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Lee SD, Yang HL, Kim IS. Four new Microbacterium species isolated from seaweeds and reclassification of five Microbacterium species with a proposal of Paramicrobacterium gen. nov. under a genome-based framework of the genus Microbacterium. Front Microbiol 2023; 14:1299950.
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Göker M. List of changes in taxonomic opinion no. 40. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2024; 74:6482.
  • ❗ Aureobacterium liquefaciens is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Aureobacterium.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 2, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 2". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1. — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1. — If in doubt, use the risk group given in the regulations for your country and, if these are not available, use the risk group given in the catalogue of the culture collection from which you have obtained or intend to obtain the strain.
  • 🎓 Name mentioned 5 times in PubMed until 2025-06-04.
  • 🙅 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as a synonym of the name to be applied to this species. The name is on LoRN because of the recorded risk group of the species itself.

Parent taxon: Aureobacterium Collins et al. 1983

Assigned by: Collins MD, Jones D, Keddie RM, Kroppenstedt RM, Schleifer KH. Classification of some coryneform bacteria in a new genus Aureobacterium. Syst Appl Microbiol 1983; 4:236-252.

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Record number: 773552