Name: Affinirhizobium pseudoryzae (Zhang et al. 2011) Ma et al. 2025

Category: Species

Proposed as: comb. nov.

Basonym: Rhizobium pseudoryzae Zhang et al. 2011

Etymology: pseud.o.ry.zae. Gr. masc./fem. adj. pseudês, false; L. gen. fem. n. oryzae, of rice and also the name of a bacterial specific epithet; N.L. gen. fem. n. pseudoryzae, not the true (Rhizobium) oryzae

Gender: neuter

Type strain: ACCC 10380; DSM 19479; DSM 26483; J3-A127; KCTC 23294

Conduct genome-based taxonomy at

16S rRNA gene: DQ454123 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: correct name (and explicitly recommended for medical use)

• Synonyms:

  • Name	Kind
    Allorhizobium pseudoryzae (Zhang et al. 2011) Mousavi et al. 2016	homotypic synonym, validly published under the ICNP
    Rhizobium pseudoryzae Zhang et al. 2011	homotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus Affinirhizobium 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. 🇬🇧
  • 🎓 Name mentioned 1 time in PubMed until 2025-10-21.
  • 🙆 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 other species in the genus.

Parent taxon: Affinirhizobium 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: 68001