Name: Orlajensenia leifsoniae Gtari et al. 2025

Category: Species

Proposed as: sp. nov.

Etymology: leif.so’ni.ae. N.L. gen. fem. n. leifsoniae, named after Einar Leifson, who first isolated and described a member of the genus Leifsonia

Pronunciation, gender: le͡if-SO-ni-a͡e, feminine

Type strain: CGMCC 1.15856; DSM 105144; KCTC 39963; SYP-B2174

Conduct genome-based taxonomy at

16S rRNA gene: KY033218 Analyse FASTA

Valid publication: Gtari M, Boussoufa D, Ghodhbane-Gtari F, Sbissi I. Taxonomic rearrangement of Salinibacterium, Leifsonia, Diaminobutyricibacter, Antiquaquibacter, Homoserinimonas and Glaciibacter: refining genus boundaries and proposal of two new genera - Orlajensenia gen. nov. and Leifsonella gen. nov. Int J Syst Evol Microbiol 2025; 75:6809.

IJSEM list: Oren A, Göker M. Notification list. Notification that new names and new combinations have appeared in volume 75, part 6 of the IJSEM. Int J Syst Evol Microbiol 2025; 75:6862.

Nomenclatural status: validly published under the ICNP

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

• Synonyms:

  • Name	Kind
    Leifsonia flava Cai et al. 2025	homotypic synonym, validly published under the ICNP

• Notes:
  • 🧬 The phylogenomic assignment score of this taxon is 0.05484 (N = 41).
  • 🎓 Name mentioned 0 times in PubMed until 2025-07-01.
  • 🙆 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 other species in the genus.

Parent taxon: Orlajensenia Gtari et al. 2025

Assigned by: Gtari M, Boussoufa D, Ghodhbane-Gtari F, Sbissi I. Taxonomic rearrangement of Salinibacterium, Leifsonia, Diaminobutyricibacter, Antiquaquibacter, Homoserinimonas and Glaciibacter: refining genus boundaries and proposal of two new genera - Orlajensenia gen. nov. and Leifsonella gen. nov. Int J Syst Evol Microbiol 2025; 75:6809.

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Record number: 66200