Name: Affinirhizobium Ma et al. 2025

Category: Genus

Proposed as: gen. nov.

Etymology: Af.fi.ni.rhi.zo’bi.um. L. masc./fem. adj. affinis, associated with, adjacent; N.L. neut. n. Rhizobium, a bacterial generic name; N.L. neut. n. Affinirhizobium, a genus associated with Rhizobium

Gender, pronunciation (Latin): neuter (stem: Affinirhizobi-), af-fi-ni-r^hi-ZO-bi-um

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

Conduct genome-based taxonomy of genus at TYGS

16S rRNA gene: 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

• Notes:
  • 🚋 The type species of this genus has alternatively been placed in the genus Allorhizobium de Lajudie et al. 1998. Publication: Mousavi SA, Willems A, Nesme X, de Lajudie P, Lindstrom K. Revised phylogeny of Rhizobiaceae: proposal of the delineation of Pararhizobium gen. nov., and 13 new species combinations. Syst Appl Microbiol 2015; 38:84-90. 🇫🇮
  • 🚋 The type species of this genus has alternatively been placed in the genus Rhizobium Frank 1889 (Approved Lists 1980). Publication: Zhang X, Sun L, Ma X, Sui XH, Jiang R. Rhizobium pseudoryzae sp. nov., isolated from the rhizosphere of rice. Int J Syst Evol Microbiol 2011; 61:2425-2429. 🇨🇳
  • 😢 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. 🇬🇧
  • 🧬 The phylogenomic assignment score of this taxon is 0.08537 (N = 13).
  • 🎰 The BRCs most frequently used for deposits in this group are: DSM: 4; KCTC: 3; ACCC: 2; MCCC: 1; LMG: 1; NBRC: 1; CGMCC: 1; BCC: 1; TBRC: 1.

Subdivision:

Number of child taxa with a validly published and correct name: 2
Number of child taxa with a validly published name, including synonyms: 2
Total number of child taxa: 5

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    "Affinirhizobium gouqiense" He et al. 2024	not validly published	preferred name
    "Affinirhizobium helianthi" (Wei et al. 2015) Ma et al. 2023	not validly published	synonym
    "Affinirhizobium lemnae" (Kittiwongwattana and Thawai 2014) He et al. 2024	not validly published	synonym
    Affinirhizobium pseudoryzae (Zhang et al. 2011) Ma et al. 2025	validly published under the ICNP	correct name
    Affinirhizobium rhizoryzae (Zhang et al. 2014) Ma et al. 2025	validly published under the ICNP	correct name

Parent taxon: Rhizobiaceae Conn 1938 (Approved Lists 1980)

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: 67874