Name: Enterocloster aldenensis corrig. (Warren et al. 2007) Haas and Blanchard 2020

Category: Species

Proposed as: comb. nov.

Basonym: Clostridium aldenense Warren et al. 2007

Etymology: al.de.nen’sis. N.L. masc. adj. aldenensis, pertaining to R. M. Alden Research Laboratory and its first patron, Rose M. Alden Goldstein [probably better: aldensis]

Pronunciation (Latin), gender: … al-de-NEN-sis, masculine

Type strain: ATCC BAA-1318; CCUG 52204; DSM 19262; RMA 9741

See detailed strain information at

16S rRNA gene: DQ279736 Analyse FASTA

Valid publication: Haas KN, Blanchard JL. Reclassification of the Clostridium clostridioforme and Clostridium sphenoides clades as Enterocloster gen. nov. and Lacrimispora gen. nov., including reclassification of 15 taxa. Int J Syst Evol Microbiol 2020; 70:23-34. 🇺🇸

IJSEM list: Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 70, part 1 of the IJSEM. Int J Syst Evol Microbiol 2020; 70:2167-2173.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

• Synonyms:

  • Name	Kind
    Clostridium aldenense Warren et al. 2007	homotypic synonym, validly published under the ICNP
    Enterocloster aldensis (Warren et al. 2007) Haas and Blanchard 2020	other spelling of name, inaccurate spelling

• Notes:
  • 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 2, note = "human pathogen". — 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 2025-06-04.
  • 🫡 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 species itself. This name is not taxonomically suspended any more in favour of Clostridium aldenense Warren et al. 2007. Publication: Warren YA, Tyrrell KL, Citron DM, Goldstein EJ. Clostridium aldenense sp. nov. and Clostridium citroniae sp. nov. isolated from human clinical infections. J Clin Microbiol 2006; 44:2416-2422. 🇺🇸 Euzeby JP. Validation list no. 115. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2007; 57:893-897.

Parent taxon: Enterocloster Haas and Blanchard 2020

Assigned by: Haas KN, Blanchard JL. Reclassification of the Clostridium clostridioforme and Clostridium sphenoides clades as Enterocloster gen. nov. and Lacrimispora gen. nov., including reclassification of 15 taxa. Int J Syst Evol Microbiol 2020; 70:23-34. 🇺🇸

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Record number: 7396