Name: Peptococcus niger (Hall 1930) Kluyver and van Niel 1936 (Approved Lists 1980)

Category: Species

Proposed as: comb. nov.

Basonym: "Micrococcus niger" Hall 1930

Etymology: ni’ger. L. masc. adj. niger, black

Pronunciation (Latin), gender: … NI-ger, masculine

Type strain: ATCC 27731; DSM 20475; NCTC 11805

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB644260 Analyse FASTA

Effective publication: Kluyver AJ, Van Niel CB. Prospects for a natural system of classification of bacteria. Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene, Abteilung II 1936; 94:369-403.

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: 2

• Synonyms:

  • Name	Kind
    "Micrococcus niger" Hall 1930	homotypic synonym, not validly published, basonym of name in Approved Lists

• Notes:
  • 🥇 Nomenclatural type of the genus Peptococcus Kluyver and van Niel 1936 (Approved Lists 1980). Publication: Kluyver AJ, Van Niel CB. Prospects for a natural system of classification of bacteria. Zentralblatt fur Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Abteilung II 1936; 94:369-403.
  • 😷 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 = 2. — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 2, note = "ht". — 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 20 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 species itself.
  • 🧍 According to Bartlett et al. (2022), this species is an established human pathogen. Publication: Bartlett A, Padfield D, Lear L, Bendall R, Vos M. A comprehensive list of bacterial pathogens infecting humans. Microbiology (Reading) 2022; 168:0. 🇬🇧

Parent taxon: Peptococcus Kluyver and van Niel 1936 (Approved Lists 1980)

Assigned by: Kluyver AJ, Van Niel CB. Prospects for a natural system of classification of bacteria. Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene, Abteilung II 1936; 94:369-403.

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Record number: 779369