Species Pseudorhizobium flavum

Name: Pseudorhizobium flavum (Gu et al. 2014) Lassalle et al. 2021

Category, proposed as: species, comb. nov.

Basonym: Rhizobium flavum Gu et al. 2014

Etymology: fla’vum. L. neut. adj. flavum, blond

Pronunciation (Latin), gender: pse͡u-do-r^hi-ZO-bi-um FLA-wum, neuter

Type strain: CCTCC AB 2013042; KACC 17222; YW14

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: KC904963 Analyse FASTA

Effective publication: Lassalle F, Dastgheib SMM, Zhao FJ, Zhang J, Verbarg S, Fruhling A, Brinkmann H, Osborne TH, Sikorski J, Balloux F, et al. Phylogenomics reveals the basis of adaptation of Pseudorhizobium species to extreme environments and supports a taxonomic revision of the genus. Syst Appl Microbiol 2021; 44:126165. 🇬🇧

IJSEM list: Oren A, Garrity GM. Validation list no. 199. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2021; 71:4773.

Nomenclatural status: validly published under the ICNP

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

Risk group: 1

• Synonyms:

  • Name	Kind
    Rhizobium flavum Gu et al. 2014	homotypic synonym, validly published under the ICNP

• Notes:
  • 🧬 The phylogenomic assignment score of this taxon is 0.08847 (N = 12).
  • 😷 The risk group for Germany has been imported on 2026-08-13. The full classification is: risk group = 1. — 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 1 time in PubMed until 2026-06-11.
  • 🙆 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: Pseudorhizobium Kimes et al. 2017

Assigned by: Lassalle F, Dastgheib SMM, Zhao FJ, Zhang J, Verbarg S, Fruhling A, Brinkmann H, Osborne TH, Sikorski J, Balloux F, et al. Phylogenomics reveals the basis of adaptation of Pseudorhizobium species to extreme environments and supports a taxonomic revision of the genus. Syst Appl Microbiol 2021; 44:126165. 🇬🇧

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Record number: 19547