Name: Peptoniphilus lacydonensis Beye et al. 2018

Category: Species

Proposed as: sp. nov.

Etymology: la.cy.do.nen’sis. N.L. masc. adj. lacydonensis, from lacydonensis, derived from Greek Λακυδω, the name of the ancient port of Marseille, where the patient from which strain EL1T was obtained, lived

Pronunciation (Latin), gender: … la-ky-do-NEN-sis, masculine

Type strain: CSUR P2013; DSM 100661; EL1

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: LN867000 Analyse FASTA

Effective publication: Beye M, Bakour S, Le Dault E, Rathored J, Michelle C, Cadoret F, Raoult D, Fournier PE. Peptoniphilus lacydonensis sp. nov., a new human-associated species isolated from a patient with chronic refractory sinusitis. New Microbes New Infect 2018; 23:61-69. 🇫🇷

IJSEM list: Oren A, Garrity GM. Validation list no. 182. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2018; 68:2130-2133.

Nomenclatural status: validly published under the ICNP

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

• Synonyms:

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

• Notes:
  • ⏰ According to Aujoulat et al. (2021), this species is an earlier heterotypic synonym of Peptoniphilus rhinitidis Jung et al. 2021. Publication: Aujoulat F, Mazuet C, Criscuolo A, Popoff MR, Enault C, Diancourt L, Jumas-Bilak E, Lavigne JP, Marchandin H. Peptoniphilus nemausensis sp. nov. A new Gram-positive anaerobic coccus isolated from human clinical samples, an emendated description of the genus Peptoniphilus and an evaluation of the taxonomic status of Peptoniphilus species with not validly published names. Syst Appl Microbiol 2021; 44:126235. 🇫🇷
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Garrity GM. List of changes in taxonomic opinion no. 35. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2022; 72:5164.
  • 🎓 Name mentioned 3 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 pathogenicity of the species itself.
  • 🧍 According to Bartlett et al. (2022), this species is a putative 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. 🇬🇧
  • 🧍 Etymology corrected on validation. Publication: Oren A, Garrity GM. Validation list no. 182. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2018; 68:2130-2133.

Parent taxon: Peptoniphilus Ezaki et al. 2001

Assigned by: Beye M, Bakour S, Le Dault E, Rathored J, Michelle C, Cadoret F, Raoult D, Fournier PE. Peptoniphilus lacydonensis sp. nov., a new human-associated species isolated from a patient with chronic refractory sinusitis. New Microbes New Infect 2018; 23:61-69. 🇫🇷

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Record number: 797599