Name: Porphyromonas bennonis Summanen et al. 2009

Category: Species

Proposed as: sp. nov.

Etymology: ben.no’nis. N.L. gen. masc. n. bennonis, of Benno, in honour of the contemporary Japanese microbiologist Yoshimi Benno, who has contributed significantly to our knowledge of anaerobic bacteria

Pronunciation, gender: … ben-NO-nis, feminine

Type strain: ATCC BAA-1629; CCUG 55979; DSM 23058; JCM 16335; WAL 1926C

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB588020 Analyse FASTA

Valid publication: Summanen PH, Lawson PA, Finegold SM. Porphyromonas bennonis sp. nov., isolated from human clinical specimens. Int J Syst Evol Microbiol 2009; 59:1727-1732. 🇺🇸

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 59, part 7 of the IJSEM. Int J Syst Evol Microbiol 2009; 59:2381-2382.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

• Emendations:
  • Hahnke et al. 2016 Hahnke RL, Meier-Kolthoff JP, Garcia-Lopez M, Mukherjee S, Huntemann M, Ivanova NN, Woyke T, Kyrpides NC, Klenk HP, Goker M. Genome-Based Taxonomic Classification of Bacteroidetes. Front Microbiol 2016; 7:2003. 🇩🇪 Oren A, Garrity GM. List of changes in taxonomic opinion no. 26. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2017; 67:2081-2086.
    Notes:
    • 🧍 The genome of the type strain was sequenced as part of the GEBA (Genomic Encyclopedia of Bacteria and Archaea) project.

• Notes:
  • 😷 The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 2. — 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 5 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: Porphyromonas Shah and Collins 1988

Assigned by: Summanen PH, Lawson PA, Finegold SM. Porphyromonas bennonis sp. nov., isolated from human clinical specimens. Int J Syst Evol Microbiol 2009; 59:1727-1732. 🇺🇸

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Record number: 788006