Name: Heterorhizobium Ma et al. 2025

Category: Genus

Proposed as: gen. nov.

Etymology: He.te.ro.rhi.zo’bi.um. Gr. masc. adj. heteros, different; N.L. neut. n. Rhizobium, a bacterial generic name; N.L. neut. n. Heterorhizobium, organism different from but related to the genus Rhizobium

Gender, pronunciation: neuter (stem: Heterorhizobi-), he-te-ro-r^hi-ZO-bi-um

Type species: Heterorhizobium halophytocola (Bibi et al. 2012) 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 Rhizobium Frank 1889 (Approved Lists 1980). Publication: Bibi F, Chung EJ, Khan A, Jeon CO, Chung YR. Rhizobium halophytocola sp. nov., isolated from the root of a coastal dune plant. Int J Syst Evol Microbiol 2012; 62:1997-2003.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Mousavi SA, Young JPW. International Committee on Systematics of Prokaryotes Subcommittee on the Taxonomy of Rhizobia and Agrobacteria: Minutes of the closed annual meeting, videoconference on 2 October 2023, followed by online discussion until 31 December 2023. Int J Syst Evol Microbiol 2024; 74:6276.
  • 😢 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 BRCs most frequently used for deposits in this group are: DSM: 1; KACC: 1; LMG: 1.

Subdivision:

Number of child taxa with a validly published and correct name: 1
Number of child taxa with a validly published name, including synonyms: 1
Total number of child taxa: 1

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Heterorhizobium halophytocola (Bibi et al. 2012) 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: 67875