Species Thomasclavelia spiroformis

Name: Thomasclavelia spiroformis (Kaneuchi et al. 1979) Lawson et al. 2023

Category, proposed as: species, comb. nov.

Basonym: Clostridium spiroforme Kaneuchi et al. 1979 (Approved Lists 1980)

Etymology: spi.ro.for’mis. Gr. fem. n. speîra, a coil; L. fem. n. forma, shape; N.L. fem. adj. spiroformis, in the shape of a coil

Pronunciation (Latin), gender: t^ho-mas-kla-WE-li-a spi-ro-FOR-mis, feminine

Type strain: ATCC 29900; CCUG 46510; CIP 106966; DSM 1552; JCM 1432; NCTC 11211; VPI C28-23-1A

Conduct genome-based taxonomy at

16S rRNA gene: X73441 Analyse FASTA

Valid publication: Lawson PA, Saavedra Perez L, Sankaranarayanan K. Reclassification of Clostridium cocleatum, Clostridium ramosum, Clostridium spiroforme and Clostridium saccharogumia as Thomasclavelia cocleata gen. nov., comb. nov., Thomasclavelia ramosa comb. nov., gen. nov., Thomasclavelia spiroformis comb. nov. and Thomasclavelia saccharogumia comb. nov. Int J Syst Evol Microbiol 2023; 73:5694. 🇺🇸

IJSEM list: Oren A, Göker M. Notification list. Notification that new names and new combinations have appeared in volume 73, part 1 of the IJSEM. Int J Syst Evol Microbiol 2023; 73:5835.

Nomenclatural status: validly published under the ICNP

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

Risk group: 1

• Synonyms:

  • Name	Kind
    Clostridium spiroforme Kaneuchi et al. 1979 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP

• Notes:
  • 😢 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 usage of the term "coherent taxon" (or equivalent) is cautioned against. 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 risk group for Germany has been imported on 2026-08-13. The full classification is: risk group = 1, note = "+". — 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 3 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: Thomasclavelia Lawson et al. 2023

Assigned by: Lawson PA, Saavedra Perez L, Sankaranarayanan K. Reclassification of Clostridium cocleatum, Clostridium ramosum, Clostridium spiroforme and Clostridium saccharogumia as Thomasclavelia cocleata gen. nov., comb. nov., Thomasclavelia ramosa comb. nov., gen. nov., Thomasclavelia spiroformis comb. nov. and Thomasclavelia saccharogumia comb. nov. Int J Syst Evol Microbiol 2023; 73:5694. 🇺🇸

Linking: To permanently link to this page, use https://doi.org/10.83108/rn.36078Copy to clipboardLink copied to clipboard

Record number: 36078

• Previous versions:

  • Version	Date	JSON
    1	2026-03-31
    2	2026-08-05