Name: Pararhizobium Mousavi et al. 2016

Category: Genus

Proposed as: gen. nov.

Etymology: Pa.ra.rhi.zo’bi.um. Gr. prep. para, beside, alongside of; N.L. neut. n. Rhizobium, a bacterial generic name; N.L. neut. n. Pararhizobium, a genus adjacent to Rhizobium

Gender, pronunciation: neuter (stem: Pararhizobi-), pa-ra-r^hi-ZO-bi-um

Type species: Pararhizobium giardinii (Amarger et al. 1997) Mousavi et al. 2016

Conduct genome-based taxonomy of genus at TYGS

16S rRNA gene: Analyse FASTA

Effective 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.

IJSEM list: Oren A, Garrity GM. Validation list no. 172. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2016; 66:4299-4305.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Synonyms:

  • Name	Kind
    Neopararhizobium Hördt et al. 2025	heterotypic synonym, validly published under the ICNP

• Notes:
  • 🚋 The type species of this genus has alternatively been placed in the genus Rhizobium Frank 1889 (Approved Lists 1980). Publication: Amarger N, Macheret V, Laguerre G. Rhizobium gallicum sp. nov. and Rhizobium giardinii sp. nov., from Phaseolus vulgaris nodules. Int J Syst Bacteriol 1997; 47:996-1006.
  • 🙄 This taxon name is occasionally misprinted (or affected by an OCR error) in some sources as: "Parahizobium".
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: de Lajudie PM, Young JPW. International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of rhizobia and agrobacteria Minutes of the closed meeting, Granada, 4 September 2017. Int J Syst Evol Microbiol 2018; 68:3363-3368.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: de Lajudie P, Young JPW. International Committee on Systematics of Prokaryotes Subcommittee on the Taxonomy of Rhizobia and Agrobacteria Minutes of the meeting by video conference, 11 July 2018. Int J Syst Evol Microbiol 2019; 69:1835-1840.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: de Lajudie PM, Young JPW. International Committee on Systematics of Prokaryotes Subcommittee for the Taxonomy of Rhizobium and Agrobacterium Minutes of the meeting, Budapest, 25 August 2016. Int J Syst Evol Microbiol 2017; 67:2485-2494.
  • 🧔 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 11 October 2022 followed by online discussion until 31 December 2022. Int J Syst Evol Microbiol 2023; 73:5856.
  • 🧔 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 annual meeting by videoconference, 5 July 2021, followed by online discussion until 31 December 2021. Int J Syst Evol Microbiol 2022; 72:5453.
  • 🧔 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 2024 closed annual meeting. Int J Syst Evol Microbiol 2025; 75:6680.
  • 🧬 The phylogenomic assignment score of this taxon is 0.08362 (N = 19).
  • 🎰 The BRCs most frequently used for deposits in this group are: LMG: 6; KCTC: 5; DSM: 4; HAMBI: 4; ACCC: 2; CCTCC: 2; MCCC: 2; JCM: 1; VKM: 1; KACC: 1.

Subdivision:

Number of child taxa with a validly published and correct name: 8
Number of child taxa with a validly published name, including synonyms: 9
Total number of child taxa: 13

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Pararhizobium antarcticum Naqvi et al. 2017	validly published under the ICNP	correct name
    Pararhizobium arenae (Zhang et al. 2017) Kuzmanović et al. 2022	validly published under the ICNP	correct name
    Pararhizobium capsulatum (Hirsch and Müller 1986) Mousavi et al. 2016	validly published under the ICNP	correct name
    "Pararhizobium gei" (Shi et al. 2016) De Lajudie and Young 2017	not validly published	synonym
    Pararhizobium gei (Shi et al. 2016) Zhang et al. 2024	validly published under the ICNP	synonym
    Pararhizobium giardinii (Amarger et al. 1997) Mousavi et al. 2016	validly published under the ICNP	correct name
    Pararhizobium haloflavum Shen et al. 2018	validly published under the ICNP	correct name
    "Pararhizobium helanshanense" (Qin et al. 2012) Mousavi et al. 2015	not validly published	preferred name
    Pararhizobium herbae (Ren et al. 2011) Mousavi et al. 2016	validly published under the ICNP	correct name
    "Pararhizobium mangrovi" Li et al. 2021	not validly published	synonym
    Pararhizobium polonicum Puławska et al. 2017	validly published under the ICNP	correct name
    Pararhizobium qamdonense Zhang et al. 2024	validly published under the ICNP	correct name
    "Pararhizobium sphaerophysae" (Xu et al. 2012) Mousavi et al. 2015	not validly published	synonym

Parent taxon: Rhizobiaceae Conn 1938 (Approved Lists 1980)

Assigned by: 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.

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Record number: 519063