Name: Prosthecobacter fusiformis (ex Staley et al. 1976) Staley et al. 1980

Category: Species

Proposed as: sp. nov., nom. rev.

Etymology: fu.si.for’mis. L. masc. n. fusus, spindle; L. masc./fem. adj. suff. -formis, -like, in the shape of; from L. fem. n. forma, shape, form; N.L. masc. adj. fusiformis, spindle-shaped

Pronunciation, gender: fu-si-FOR-mis, masculine

Type strain: ATCC 25309; DSM 8960; FC4

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: U60015 Analyse FASTA

Valid publication: Staley JT, De Bont JAM, De Jonge K. Prosthecobacter fusiformis gen. and sp. nov., nom. rev. Int. J. Syst. Bacteriol. 1980; 30:595.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Emendations:
  • García-López et al. 2019 Garcia-Lopez M, Meier-Kolthoff JP, Tindall BJ, Gronow S, Woyke T, Kyrpides NC, Hahnke RL, Goker M. Analysis of 1,000 Type-Strain Genomes Improves Taxonomic Classification of Bacteroidetes. Front Microbiol 2019; 10:2083. Oren A, Garrity GM. List of changes in taxonomic opinion no. 32. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2020; 70:4061-4090.

• Notes:
  • 🥇 Nomenclatural type of the genus Prosthecobacter (ex Staley et al. 1976) Staley et al. 1980. Publication: Staley JT, De Bont JAM, De Jonge K. Prosthecobacter fusiformis gen. and sp. nov., nom. rev. Int. J. Syst. Bacteriol. 1980; 30:595.
  • 😷 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.

Parent taxon: Prosthecobacter (ex Staley et al. 1976) Staley et al. 1980

Assigned by: Staley JT, De Bont JAM, De Jonge K. Prosthecobacter fusiformis gen. and sp. nov., nom. rev. Int. J. Syst. Bacteriol. 1980; 30:595.

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Record number: 779853