Name: Butyrivibrio fibrisolvens Bryant and Small 1956 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: fi.bri.sol’vens. L. fem. n. fibra, a fibre, filament; L. pres. part. solvens, dissolving; N.L. masc. part. adj. fibrisolvens, fiber-dissolving

Pronunciation, gender: fi-bri-SOL-wens, masculine

Type strain: ATCC 19171; DSM 3071

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: U41172 Analyse FASTA

Effective publication: Bryant MP, Small N. The anaerobic monotrichous butyric acid-producing curved rod-shaped bacteria of the rumen. J Bacteriol 1956; 72:16-21.

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: correct name (and explicitly recommended for medical use)

Risk group: 1

• Notes:
  • 🥇 Nomenclatural type of the genus Butyrivibrio Bryant and Small 1956 (Approved Lists 1980). Publication: Bryant MP, Small N. The anaerobic monotrichous butyric acid-producing curved rod-shaped bacteria of the rumen. J Bacteriol 1956; 72:16-21.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 1". — 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 396 times in PubMed until 2025-06-04.
  • 🙆 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as the name to be applied to this species. The name is on LoRN because of the recorded risk group of the genus.

Parent taxon: Butyrivibrio Bryant and Small 1956 (Approved Lists 1980)

Assigned by: Bryant MP, Small N. The anaerobic monotrichous butyric acid-producing curved rod-shaped bacteria of the rumen. J Bacteriol 1956; 72:16-21.

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Record number: 774324