Name: Paenirhizobium daejeonense (Quan et al. 2005) Ma et al. 2025

Category: Species

Proposed as: comb. nov.

Basonym: Rhizobium daejeonense Quan et al. 2005

Etymology: dae.je.o.nen’se. N.L. neut. adj. daejeonense, pertaining to Daejeon, a city in Korea, where the type strain was isolated

Pronunciation, gender: da͡e-je-o-NEN-se, neuter

Type strain: CCBAU 10050; DSM 17795; IAM 15042; JCM 21505; KCTC 12121; L61; LMG 25353; NBRC 102495; NCIMB 14499

Conduct genome-based taxonomy at

16S rRNA gene: AB681832 Analyse FASTA

Effective publication: Ma T, Xue H, Piao C, Jiang N, Li Y. Phylogenomic reappraisal of the family Rhizobiaceae at the genus and species levels, including the description of Ectorhizobium quercum gen. nov., sp. nov. Front Microbiol 2023; 14:1207256.

IJSEM list: Oren A, Göker M. Validation list no. 225. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2025; 75:6863.

Nomenclatural status: validly published under the ICNP

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

Correct name: Rhizobium daejeonense Quan et al. 2005

• Synonyms:

  • Name	Kind
    Rhizobium daejeonense Quan et al. 2005	homotypic synonym, validly published under the ICNP
    "Ciceribacter daejeonensis" (Quan et al. 2005) Rahi et al. 2021	homotypic synonym, not validly published

• Notes:
  • 🥇 Nomenclatural type of the genus Paenirhizobium Ma et al. 2025. Publication: Ma T, Xue H, Piao C, Jiang N, Li Y. Phylogenomic reappraisal of the family Rhizobiaceae at the genus and species levels, including the description of Ectorhizobium quercum gen. nov., sp. nov. Front Microbiol 2023; 14:1207256.
  • 😢 The terminology used by the authors is in line with many other taxonomic studies and does not negatively affect their main results; some improvements may nevertheless be possible. Contrasting the term "chemotaxonomic" with "phenotypic" is not recommended. The phrase "validly described" is misleading. See the LPSN phylogeny page for details. Publication: Göker M. What can genome analysis offer for bacteria? In: Bridge P, Smith D, Stackebrandt E (eds), Trends in the systematics of bacteria and fungi, CAB International, Wallingford, 2021, p. 255-281.
  • ❗ Paenirhizobium daejeonense 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 Paenirhizobium.
  • 🎓 Name mentioned 0 times in PubMed until 2025-10-21.
  • 🙅 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 pathogenicity of other species in the genus.

Parent taxon: Paenirhizobium Ma et al. 2025

Assigned by: Ma T, Xue H, Piao C, Jiang N, Li Y. Phylogenomic reappraisal of the family Rhizobiaceae at the genus and species levels, including the description of Ectorhizobium quercum gen. nov., sp. nov. Front Microbiol 2023; 14:1207256.

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Record number: 67952