Name: Ruminiclostridium josui (Sukhumavasi et al. 1988) Zhang et al. 2018

Category: Species

Proposed as: comb. nov.

Basonym: Clostridium josui Sukhumavasi et al. 1988

Etymology: jo’su.i. N.L. gen. masc. n. josui, the first four letters were obtained by combining the initial letters of the names of the authors, and the last letter was added according to the requirements of the International Code of Nomenclature of Bacteria

Pronunciation (Latin), gender: ru-mi-ni-klos-TRI-di-um JO-su-i, neuter

Type strain: DSM 25723; FERM P-9684; III; JCM 17888

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB011057 Analyse FASTA

Valid publication: Zhang X, Tu B, Dai LR, Lawson PA, Zheng ZZ, Liu LY, Deng Y, Zhang H, Cheng L. Petroclostridium xylanilyticum gen. nov., sp. nov., a xylan-degrading bacterium isolated from an oilfield, and reclassification of clostridial cluster III members into four novel genera in a new Hungateiclostridiaceae fam. nov. Int J Syst Evol Microbiol 2018; 68:3197-3211. 🇨🇳

IJSEM list: Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 68, part 10 of the IJSEM. Int J Syst Evol Microbiol 2019; 69:10-12.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name (and explicitly recommended for medical use)

Risk group: 1

• Synonyms:

  • Name	Kind
    Clostridium josui Sukhumavasi et al. 1988	homotypic synonym, validly published under the ICNP

• Notes:
  • 😷 The risk group for Germany has been imported on 2026-08-13. 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 7 times in PubMed until 2026-06-11.
  • 🙆 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as the name to be applied to this species. The name is on LoRN because of the recorded risk group of the genus.

Parent taxon: Ruminiclostridium Zhang et al. 2018

Assigned by: Zhang X, Tu B, Dai LR, Lawson PA, Zheng ZZ, Liu LY, Deng Y, Zhang H, Cheng L. Petroclostridium xylanilyticum gen. nov., sp. nov., a xylan-degrading bacterium isolated from an oilfield, and reclassification of clostridial cluster III members into four novel genera in a new Hungateiclostridiaceae fam. nov. Int J Syst Evol Microbiol 2018; 68:3197-3211. 🇨🇳

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Record number: 798374