Name: Peteryoungia Rahi et al. 2021

Category: Genus

Proposed as: gen. nov.

Etymology: Pe.ter.youn’gi.a. N.L. fem. n. Peteryoungia, named to honour Prof J. Peter W. Young, who contributed extensively towards the taxonomy and genomics of the family Rhizobiaceae

Gender, pronunciation: feminine (stem: Peteryoungi-), pe-ter-YOUN-gi-a

Type species: Peteryoungia ipomoeae (Sheu et al. 2016) Rahi et al. 2021

Conduct genome-based taxonomy of genus at TYGS

16S rRNA gene: Analyse FASTA

Effective publication: Rahi P, Khairnar M, Hagir A, Narayan A, Jain KR, Madamwar D, Pansare A, Shouche Y. Peteryoungia gen. nov. with four new species combinations and description of Peteryoungia desertarenae sp. nov., and taxonomic revision of the genus Ciceribacter based on phylogenomics of Rhizobiaceae. Arch Microbiol 2021; 203:3591-3604.

IJSEM list: Oren A, Garrity GM. Validation list no. 202. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2021; 71:5096.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Rhizobium Frank 1889 (Approved Lists 1980)

• Synonyms:

  • Name	Kind
    Rhizobium Frank 1889 (Approved Lists 1980)	heterotypic synonym, validly published under the ICNP, conserved name
    Paenirhizobium Ma et al. 2025	heterotypic synonym, validly published under the ICNP

• Notes:
  • 🚂 For the type species of this genus another name is in use, which is affiliated with the genus Rhizobium Frank 1889 (Approved Lists 1980). Publication: Sheu SY, Chen ZH, Young CC, Chen WM. Rhizobium ipomoeae sp. nov., isolated from a water convolvulus field. Int J Syst Evol Microbiol 2016; 66:1633-1640.
  • 🧔 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 closed annual meeting, videoconference on 2 October 2023, followed by online discussion until 31 December 2023. Int J Syst Evol Microbiol 2024; 74:6276.
  • 🧔 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.
  • ❗ Peteryoungia is the correct name instead if this genus is regarded as a separate genus (i.e., if its nomenclatural type is not assigned to another genus whose name is validly published, legitimate and not rejected and has priority).
  • 🧬 The phylogenomic assignment score of this taxon is 0.08884 (N = 13).
  • 🎰 The BRCs most frequently used for deposits in this group are: DSM: 4; LMG: 3; ATCC: 2; KCTC: 2; GDMCC: 2; KACC: 2; CGMCC: 1; CCM: 1; CCTCC: 1; VKM: 1.

Subdivision:

Number of child taxa with a validly published and correct name: 0
Number of child taxa with a validly published name, including synonyms: 4
Total number of child taxa: 9

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Peteryoungia aggregata (Hirsch and Müller 1986) Kuzmanović et al. 2022	validly published under the ICNP	synonym
    "Peteryoungia albertimagni" (Salmassi et al. 2002) Ma et al. 2023	not validly published	preferred name
    "Peteryoungia algae" Yin et al. 2024	not validly published	preferred name
    "Peteryoungia desertarenae" Rahi et al. 2021	not validly published	preferred name
    "Peteryoungia glycinendophyticum" (Wang et al. 2020) Ma et al. 2023	not validly published	preferred name
    Peteryoungia ipomoeae (Sheu et al. 2016) Rahi et al. 2021	validly published under the ICNP	synonym
    Peteryoungia rhizophila (Gao et al. 2020) Rahi et al. 2025	validly published under the ICNP	synonym
    "Peteryoungia rosettiformans" (Kaur et al. 2011) Rahi et al. 2021	not validly published	synonym
    Peteryoungia wuzhouensis (Yuan et al. 2018) Rahi et al. 2025	validly published under the ICNP	synonym

Parent taxon: Rhizobiaceae Conn 1938 (Approved Lists 1980)

Assigned by: Rahi P, Khairnar M, Hagir A, Narayan A, Jain KR, Madamwar D, Pansare A, Shouche Y. Peteryoungia gen. nov. with four new species combinations and description of Peteryoungia desertarenae sp. nov., and taxonomic revision of the genus Ciceribacter based on phylogenomics of Rhizobiaceae. Arch Microbiol 2021; 203:3591-3604.

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Record number: 19936