Name: Fusobacterium equinum Dorsch et al. 2001

Category: Species

Proposed as: sp. nov.

Etymology: e.qui’num. L. neut. adj. equinum, of horses

Pronunciation, gender: e-KWI-num, neuter

Type strain: DSM 17476; JCM 11174; NCTC 13176; VPB 4027

See detailed strain information at

16S rRNA gene: AJ295750 Analyse FASTA

Valid publication: Dorsch M, Lovet DN, Bailey GD. Fusobacterium equinum sp. nov., from the oral cavity of horses. Int J Syst Evol Microbiol 2001; 51:1959-1963.

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 51, part 6 of the IJSEM. Int J Syst Evol Microbiol 2002; 52:5-6.

Nomenclatural status: validly published under the ICNP

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

Correct name: Fusobacterium gonidiaformans (Tunnicliff and Jackson 1925) Moore and Holdeman 1970 (Approved Lists 1980)

Risk group: 2

• Synonyms:

  • Name	Kind
    Fusobacterium gonidiaformans (Tunnicliff and Jackson 1925) Moore and Holdeman 1970 (Approved Lists 1980)	heterotypic synonym, validly published under the ICNP
    "Bacillus gonidiaformans" Tunnicliff and Jackson 1925	heterotypic synonym, not validly published, basonym of name in Approved Lists

• Notes:
  • ⏲ According to Fatahi-Bafghi (2024), this species is a later heterotypic synonym of "Bacillus gonidiaformans" Tunnicliff and Jackson 1925. Publication: Fatahi-Bafghi M. Genomic and phylogenomic analysis of Fusobacteriaceae family and proposal to reclassify Fusobacterium naviforme Jungano 1909 into a novel genus as Zandiella naviformis gen. nov., comb. nov. and reclassification of Fusobacterium necrophorum subsp. funduliforme as later heterotypic synonym of Fusobacterium necrophorum subsp. necrophorum and Fusobacterium equinum as later heterotypic synonym of Fusobacterium gonidiaformans. Antonie Van Leeuwenhoek 2024; 117:34.
  • ⏲ According to Fatahi-Bafghi (2024), this species is a later heterotypic synonym of Fusobacterium gonidiaformans (Tunnicliff and Jackson 1925) Moore and Holdeman 1970 (Approved Lists 1980). Publication: Fatahi-Bafghi M. Genomic and phylogenomic analysis of Fusobacteriaceae family and proposal to reclassify Fusobacterium naviforme Jungano 1909 into a novel genus as Zandiella naviformis gen. nov., comb. nov. and reclassification of Fusobacterium necrophorum subsp. funduliforme as later heterotypic synonym of Fusobacterium necrophorum subsp. necrophorum and Fusobacterium equinum as later heterotypic synonym of Fusobacterium gonidiaformans. Antonie Van Leeuwenhoek 2024; 117:34.
  • 🏢 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.
  • ❗ Fusobacterium equinum 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 Fusobacterium.
  • 😷 The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 2. — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 2, note = "t". — 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 7 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: Fusobacterium Knorr 1922 (Approved Lists 1980)

Assigned by: Dorsch M, Lovet DN, Bailey GD. Fusobacterium equinum sp. nov., from the oral cavity of horses. Int J Syst Evol Microbiol 2001; 51:1959-1963.

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Record number: 776402