Name: Pseudocoprococcus catus (Holdeman and Moore 1974) Yamamoto et al. 2026

Category: Species

Proposed as: comb. nov.

Basonym: Coprococcus catus Holdeman and Moore 1974 (Approved Lists 1980)

Etymology: ca’tus. L. masc. adj. catus, clever, referring to the unusual property of producing large quantities of both propionate and butyrate

Pronunciation (Latin), gender: … KA-tus, masculine

Type strain: ATCC 27761; JCM 37941; VPI C6-61

Conduct genome-based taxonomy at

16S rRNA gene: AB038359 Analyse FASTA

Valid publication: Yamamoto E, Hisatomi A, Miwa K, Sakurai N, Koizumi A, Ohkuma M, Tsuchihashi H, Sakamoto M. Proposal of two novel species, Allocoprococcus similis gen. nov., sp. nov. and Faecalimonas hominis sp. nov., isolated from human faeces and genome-based reorganization of the genus Coprococcus. Int J Syst Evol Microbiol 2026; 76:7011. 🇯🇵

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name (and explicitly recommended for medical use)

• Synonyms:

  • Name	Kind
    Coprococcus catus Holdeman and Moore 1974 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus Pseudocoprococcus Yamamoto et al. 2026. Publication: Yamamoto E, Hisatomi A, Miwa K, Sakurai N, Koizumi A, Ohkuma M, Tsuchihashi H, Sakamoto M. Proposal of two novel species, Allocoprococcus similis gen. nov., sp. nov. and Faecalimonas hominis sp. nov., isolated from human faeces and genome-based reorganization of the genus Coprococcus. Int J Syst Evol Microbiol 2026; 76:7011. 🇯🇵
  • 😷 The taxon name shown here has no risk group assigned, but is the homotypic synonym of Coprococcus catus Holdeman and Moore 1974 (Approved Lists 1980), which has a risk group (Swiss Confederation) above 1. This may require that the name shown here is not treated as the correct name for practical purposes.
  • 🎓 Name mentioned 0 times in PubMed until 2026-01-09.
  • 🙆 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.

Parent taxon: Pseudocoprococcus Yamamoto et al. 2026

Assigned by: Yamamoto E, Hisatomi A, Miwa K, Sakurai N, Koizumi A, Ohkuma M, Tsuchihashi H, Sakamoto M. Proposal of two novel species, Allocoprococcus similis gen. nov., sp. nov. and Faecalimonas hominis sp. nov., isolated from human faeces and genome-based reorganization of the genus Coprococcus. Int J Syst Evol Microbiol 2026; 76:7011. 🇯🇵

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Record number: 69699