Name: Coprococcus comes Holdeman and Moore 1974 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: com’es. L. masc./fem. n. comes, companion, fellow traveller (referring to the presence of the species in human feces)

Pronunciation, gender: KOM-es, masculine

Type strain: ATCC 27758; VPI C1-38

Conduct genome-based taxonomy at

16S rRNA gene: EF031542 Analyse FASTA

Effective publication: Holdeman LV, Moore WEC. New genus, Coprococcus, twelve new species, and emended descriptions of four previously described species of bacteria from human feces. International Journal of Systematic Bacteriology 1974; 24:260-277.

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:
  • 🧬 The phylogenomic assignment score of this taxon is -0.07874 (N = 77).
  • 😷 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, note = "PIIC". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1, note = "+". — 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 40 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.
  • 🧍 According to Ludwig et al. (2021), this "species is susceptible to being reclassified as a new genus together with Clostridium nexile (also susceptible to being reclassified)". Publication: Ludwig W, Viver T, Westram R, Francisco Gago J, Bustos-Caparros E, Knittel K, Amann R, Rossello-Mora R. Release LTP_12_2020, featuring a new ARB alignment and improved 16S rRNA tree for prokaryotic type strains. Syst Appl Microbiol 2021; 44:126218.

Parent taxon: Coprococcus Holdeman and Moore 1974 (Approved Lists 1980)

Assigned by: Holdeman LV, Moore WEC. New genus, Coprococcus, twelve new species, and emended descriptions of four previously described species of bacteria from human feces. International Journal of Systematic Bacteriology 1974; 24:260-277.

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Record number: 783692