Name: Asaccharospora irregularis (Choukévitch 1911) Gerritsen et al. 2014

Category: Species

Proposed as: comb. nov.

Basonym: "Bacillus irregularis" Choukévitch 1911

Etymology: ir.re.gu.la’ris. L. fem. adj. irregularis, irregular, referring to pleomorphic, irregular cells

Pronunciation (Latin), gender: a-sak-k^ha-RO-spo-ra ir-re-gu-LA-ris, feminine

Type strain: ATCC 25756; DSM 2635; JCM 1425

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: X73447 Analyse FASTA

Valid publication: Gerritsen J, Fuentes S, Grievink W, van Niftrik L, Tindall BJ, Timmerman HM, Rijkers GT, Smidt H. Characterization of Romboutsia ilealis gen. nov., sp. nov., isolated from the gastro-intestinal tract of a rat, and proposal for the reclassification of five closely related members of the genus Clostridium into the genera Romboutsia gen. nov., Intestinibacter gen. nov., Terrisporobacter gen. nov. and Asaccharospora gen. nov. Int J Syst Evol Microbiol 2014; 64:1600-1616. 🇳🇱

IJSEM list: Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 64, part 5 of the IJSEM. Int J Syst Evol Microbiol 2014; 64:2509-2511.

Nomenclatural status: validly published under the ICNP

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

Risk group: 1

• Synonyms:

  • Name	Kind
    Clostridium irregularis (Choukévitch 1911) Prévot 1938 (Approved Lists 1980)	homotypic synonym, inaccurate spelling
    Clostridium irregulare corrig. (Choukévitch 1911) Prévot 1938 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP
    "Bacillus irregularis" Choukévitch 1911	homotypic synonym, not validly published, basonym of name in Approved Lists

• Notes:
  • 🥇 Nomenclatural type of the genus Asaccharospora Gerritsen et al. 2014. Publication: Gerritsen J, Fuentes S, Grievink W, van Niftrik L, Tindall BJ, Timmerman HM, Rijkers GT, Smidt H. Characterization of Romboutsia ilealis gen. nov., sp. nov., isolated from the gastro-intestinal tract of a rat, and proposal for the reclassification of five closely related members of the genus Clostridium into the genera Romboutsia gen. nov., Intestinibacter gen. nov., Terrisporobacter gen. nov. and Asaccharospora gen. nov. Int J Syst Evol Microbiol 2014; 64:1600-1616. 🇳🇱
  • 😷 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 1 time 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: Asaccharospora Gerritsen et al. 2014

Assigned by: Gerritsen J, Fuentes S, Grievink W, van Niftrik L, Tindall BJ, Timmerman HM, Rijkers GT, Smidt H. Characterization of Romboutsia ilealis gen. nov., sp. nov., isolated from the gastro-intestinal tract of a rat, and proposal for the reclassification of five closely related members of the genus Clostridium into the genera Romboutsia gen. nov., Intestinibacter gen. nov., Terrisporobacter gen. nov. and Asaccharospora gen. nov. Int J Syst Evol Microbiol 2014; 64:1600-1616. 🇳🇱

Linking: To permanently link to this page, use https://doi.org/10.83108/rn.791851Copy to clipboardLink copied to clipboard

Record number: 791851