Name: Fusobacterium polymorphum (Dzink et al. 1990 ex Knorr 1922) Kook et al. 2022

Category: Species

Proposed as: comb. nov.

Basonym: Fusobacterium nucleatum subsp. polymorphum (ex Knorr 1922) Dzink et al. 1990

Etymology: po.ly.mor’phum. N.L. neut. adj. polymorphum, multiform, polymorphic; from Gr. neut. adj. polymorphon, multiform

Pronunciation (Latin), gender: … po-ly-MOR-p^hum, neuter

Type strain: ATCC 10953; CCUG 9126; DSM 20482; JCM 12990; NCTC 10562

Conduct genome-based taxonomy at

16S rRNA gene: AB550231 Analyse FASTA

Effective publication: Kook JK, Park SN, Lim YK, Cho E, Jo E, Roh H, Shin Y, Paek J, Kim HS, Kim H, et al. Correction to: Genome-Based Reclassification of Fusobacterium nucleatum Subspecies at the Species Level. Curr Microbiol 2021; 79:2. 🇰🇷

IJSEM list: Oren A, Garrity GM. Validation list no. 204. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2022; 72:5260.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym (taxonomically suspended)

Correct name: Fusobacterium nucleatum subsp. polymorphum (ex Knorr 1922) Dzink et al. 1990

Risk group: 2

• Synonyms:

  • Name	Kind
    Fusobacterium nucleatum subsp. polymorphum (ex Knorr 1922) Dzink et al. 1990	homotypic synonym, validly published under the ICNP, distinct rank
    "Fusobacterium polymorphum" Knorr 1922	homotypic synonym, not validly published

• Notes:
  • ❗ Fusobacterium polymorphum 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 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". — 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 12 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. This name is taxonomically suspended (although yet another name is preferred) until no later than 2027 in favour of Fusobacterium nucleatum Knorr 1922 (Approved Lists 1980). Publication: Knorr M. Über die fusospirillare Symbiose, die Gattung Fusobacterium (K.B. Lehmann) und Spirillum sputigenum. Zugleich ein Beitrag zur Bakteriologie der Mundhöhle. II. Mitteilung. Die Gattung Fusobacterium. Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene, Abteilung I 1922; 89:4-22. Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Parent taxon: Fusobacterium Knorr 1922 (Approved Lists 1980)

Assigned by: Kook JK, Park SN, Lim YK, Cho E, Jo E, Roh H, Shin Y, Paek J, Kim HS, Kim H, et al. Correction to: Genome-Based Reclassification of Fusobacterium nucleatum Subspecies at the Species Level. Curr Microbiol 2021; 79:2. 🇰🇷

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Record number: 28163