Name: Peptoniphilus porci Wylensek et al. 2021

Category: Species

Proposed as: sp. nov.

Etymology: por’ci. L. gen. masc. n. porci, of a pig

Pronunciation, gender: POR-ki, masculine

Type strain: 35-6-1; DSM 104947; JCM 34366

Conduct genome-based taxonomy at

16S rRNA gene: MN537472 Analyse FASTA

Effective publication: Wylensek D, Hitch TCA, Riedel T, Afrizal A, Kumar N, Wortmann E, Liu T, Devendran S, Lesker TR, Hernandez SB, et al. A collection of bacterial isolates from the pig intestine reveals functional and taxonomic diversity. Nat Commun 2020; 11:6389. 🇩🇪

IJSEM list: Oren A, Garrity GM. Validation list no. 200. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2021; 71:4846.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym (and not recommended for medical use)

Correct name: Peptoniphilus faecalis Ryu et al. 2021

• Synonyms:

  • Name	Kind
    Peptoniphilus faecalis Ryu et al. 2021	heterotypic synonym, validly published under the ICNP

• Emendations:
  • Malhotra et al. 2024 Malhotra M, Bello S, Gupta RS. Phylogenomic and molecular markers based studies on clarifying the evolutionary relationships among Peptoniphilus species. Identification of several Genus-Level clades of Peptoniphilus species and transfer of some Peptoniphilus species to the genus Aedoeadaptatus. Syst Appl Microbiol 2024; 47:126499. 🇨🇦
    Notes:
    • 🫂 Emendation accompanied by a proposal regarding the synonymy of the species.
    • 🧍 As of 2024-03-07 this emendation was not yet included in an IJSEM List of Changes in Taxonomic Opinion.

• Notes:
  • ⏲ According to Malhotra et al. (2024), this species is a later heterotypic synonym of Peptoniphilus faecalis Ryu et al. 2021. Publication: Malhotra M, Bello S, Gupta RS. Phylogenomic and molecular markers based studies on clarifying the evolutionary relationships among Peptoniphilus species. Identification of several Genus-Level clades of Peptoniphilus species and transfer of some Peptoniphilus species to the genus Aedoeadaptatus. Syst Appl Microbiol 2024; 47:126499. 🇨🇦
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Göker M. List of changes in taxonomic opinion no. 40. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2024; 74:6482.
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Göker M. List of changes in taxonomic opinion no. 41. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2025; 75:6561.
  • ❗ Peptoniphilus porci is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Peptoniphilus.
  • 🎓 Name mentioned 0 times in PubMed until 2025-06-04.
  • 🙅 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as a synonym of the name to be applied to this species. The name is on LoRN because of the recorded risk group of the genus.

Parent taxon: Peptoniphilus Ezaki et al. 2001

Assigned by: Wylensek D, Hitch TCA, Riedel T, Afrizal A, Kumar N, Wortmann E, Liu T, Devendran S, Lesker TR, Hernandez SB, et al. A collection of bacterial isolates from the pig intestine reveals functional and taxonomic diversity. Nat Commun 2020; 11:6389. 🇩🇪

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Record number: 20241