Name: Cytophaga flevensis van der Meulen et al. 1974 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: fle.ven’sis. L. n. Flevum, a former inner sea in the central part of The Netherlands which is now a freshwater lake called IJsselmeer; L. masc./fem. adj. suff. -ensis, suffix used with the sense of belonging to or coming from; M.L. fem. adj. flevensis, pertaining to Flevum

Pronunciation, gender: fle-WEN-sis, feminine

Type strain: ATCC 27944; CCUG 14832; CIP 104740; DSM 1076; IFO 14960; JCM 21143; LMG 8328; NBRC 14960

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB680723 Analyse FASTA

Effective publication: van der Meulen HJ, Harder W, Veldkamp H. Isolation and characterization of Cytophaga flevensis sp. nov., a new agarolytic flexibacterium. Antonie Van Leeuwenhoek 1974; 40:329-346.

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: synonym (and not recommended for medical use)

Correct name: Flavobacterium flevense (van der Meulen et al. 1974) Bernardet et al. 1996

Risk group: 1

• Synonyms:

  • Name	Kind
    Flavobacterium flevense (van der Meulen et al. 1974) Bernardet et al. 1996	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Cytophaga flevensis 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 Cytophaga.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No". — 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 4 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 genus.

Parent taxon: Cytophaga Winogradsky 1929 (Approved Lists 1980)

Assigned by: van der Meulen HJ, Harder W, Veldkamp H. Isolation and characterization of Cytophaga flevensis sp. nov., a new agarolytic flexibacterium. Antonie Van Leeuwenhoek 1974; 40:329-346.

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Record number: 775392