Name: Cytophaga columnaris (Bernardet and Grimont 1989) Reichenbach 1989

Category: Species

Proposed as: comb. nov.

Basonym: Flexibacter columnaris (ex Davis 1922) Bernardet and Grimont 1989

Etymology: co.lum.nar’is L. masc./fem. adj. columnaris, rising in the form of a pillar, referring to the shape of the aggregates formed by the bacteria on external lesions of infected fish

Gender: feminine

Type strain: 1-S-2cl (Anacker 1956); ATCC 23463; DSM 18644; NCIMB 2248; NCMB 2248

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: D12659 Analyse FASTA

Effective publication: Reichenbach H. Genus I. Cytophaga Winogradsky 1929, 577, emend. In: Staley JT, Bryant MP, Pfennig N, Holt JG (eds), Bergey's manual of systematic bacteriology, vol. 3., The Williams & Wilkins Co., Baltimore, 1989, p. 2015-2020.

IJSEM list: Anonymous. Validation list no. 31. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1989; 39:495-497.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Flavobacterium columnare (Bernardet and Grimont 1989) Bernardet et al. 1996

Risk group: 1

• Synonyms:

  • Name	Kind
    Flexibacter columnaris (ex Davis 1922) Bernardet and Grimont 1989	homotypic synonym, validly published under the ICNP
    Flavobacterium columnare (Bernardet and Grimont 1989) Bernardet et al. 1996	homotypic synonym, validly published under the ICNP

• Notes:
  • Cytophaga columnaris is the correct name if this species is regarded as a separate species within a separate genus Cytophaga.
  • In Validation List no. 31, the page numbers of the paper by Reichenbach 1989 are erroneously cited as 2015-2020 (sic). Publication: Euzeby JP, Kudo T. Corrigenda to the validation lists. Int J Syst Evol Microbiol 2001; 51:1933-1938.
  • The full TRBA 466 classification is: risk group = 1, note = "t2".

Parent taxon: Cytophaga Winogradsky 1929 (Approved Lists 1980)

Assigned by: Reichenbach H. Genus I. Cytophaga Winogradsky 1929, 577, emend. In: Staley JT, Bryant MP, Pfennig N, Holt JG (eds), Bergey's manual of systematic bacteriology, vol. 3., The Williams & Wilkins Co., Baltimore, 1989, p. 2015-2020.

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Record number: 783721