Name: Prosthecomicrobium hirschii Staley 1984

Category: Species

Proposed as: sp. nov.

Etymology: hir’schi.i. N.L. gen. masc. n. hirschii, of Hirsch, named in honor of P. Hirsch, an authority on budding bacteria

Pronunciation (Latin), gender: … HIR-s͡hi-i, neuter

Type strain: 16; ATCC 27832; DSM 8907; UQM 41824

Conduct genome-based taxonomy at

16S rRNA gene: HM037994 Analyse FASTA

Valid publication: Staley JT. Prosthecomicrobium hirschii, a new species in a redefined genus. Int. J. Syst. Bacteriol. 1984; 34:304-308. 🇺🇸

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Prosthecodimorpha hirschii (Staley 1984) Vasilyeva et al. 2025

Risk group: 1

• Synonyms:

  • Name	Kind
    "Prosthecodimorpha hirschii" (Staley 1984) Vasilyeva et al. 2022	homotypic synonym, not validly published
    Prosthecodimorpha hirschii (Staley 1984) Vasilyeva et al. 2025	homotypic synonym, validly published under the ICNP

• Emendations:
  • Hördt et al. 2020 Hordt A, Lopez MG, Meier-Kolthoff JP, Schleuning M, Weinhold LM, Tindall BJ, Gronow S, Kyrpides NC, Woyke T, Goker M. Analysis of 1,000+ Type-Strain Genomes Substantially Improves Taxonomic Classification of Alphaproteobacteria. Front Microbiol 2020; 11:468. 🇩🇪 Oren A, Garrity GM. List of changes in taxonomic opinion no. 32. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2020; 70:4061-4090.

• Notes:
  • ❗ Prosthecomicrobium hirschii is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Prosthecomicrobium.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1. — The risk group for Germany has been imported on 2023-10-29. 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 4 times in PubMed until 2025-06-04.
  • 🧍 According to Ludwig et al. (2021), this "species is faraway from its type species and may be reclassified as a new genus". Publication: Ludwig W, Viver T, Westram R, Francisco Gago J, Bustos-Caparros E, Knittel K, Amann R, Rossello-Mora R. Release LTP_12_2020, featuring a new ARB alignment and improved 16S rRNA tree for prokaryotic type strains. Syst Appl Microbiol 2021; 44:126218. 🇪🇸

Parent taxon: Prosthecomicrobium Staley 1968 (Approved Lists 1980)

Assigned by: Staley JT. Prosthecomicrobium hirschii, a new species in a redefined genus. Int. J. Syst. Bacteriol. 1984; 34:304-308. 🇺🇸

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Record number: 779860