Name: Megasphaera jansseni Heng et al. 2025

Category: Species

Proposed as: sp. nov.

Etymology: jans’se.ni. N.L. gen. masc. n. jansseni, of Janssen, named in honour of New Zealand microbiologist Peter H. Janssen for his contributions to our understanding of the systematics, physiology, and ecology of anaerobic microorganisms

Pronunciation (Latin), gender: me-ga-SP^HA͡E-ra JANS-se-ni, feminine

Type strain: DSM 118846; LMG 33760; WILCCON 0056

Conduct genome-based taxonomy at

16S rRNA gene: PQ362931 Analyse FASTA

Valid publication: Heng YC, Lee JKY, Silvaraju S, Kittelmann S. Description of Megasphaera jansseni sp. nov., a novel short- and medium-chain fatty acid-producing species isolated from faeces of a wild boar (Sus scrofa), and a taxonomic note on the family Veillonellaceae. Int J Syst Evol Microbiol 2025; 75:6937. 🇸🇬

IJSEM list: Oren A, Göker M. Notification list. Notification that new names and new combinations have appeared in volume 75, part 10 of the IJSEM. Int J Syst Evol Microbiol 2026; 76:6976.

Nomenclatural status: validly published under the ICNP

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

• Notes:
  • 🎓 Name mentioned 1 time in PubMed until 2025-11-04.
  • 🙆 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.

Parent taxon: Megasphaera Rogosa 1971 (Approved Lists 1980)

Assigned by: Heng YC, Lee JKY, Silvaraju S, Kittelmann S. Description of Megasphaera jansseni sp. nov., a novel short- and medium-chain fatty acid-producing species isolated from faeces of a wild boar (Sus scrofa), and a taxonomic note on the family Veillonellaceae. Int J Syst Evol Microbiol 2025; 75:6937. 🇸🇬

Linking: To permanently link to this page, use https://doi.org/10.83108/rn.68239Copy to clipboardLink copied to clipboard

Record number: 68239

• Previous versions:

  • Version	Date	JSON
    1	2026-03-31