Name: Lacrimispora sphenoides (Douglas et al. 1919) Haas and Blanchard 2020

Category: Species

Proposed as: comb. nov.

Basonym: "Bacillus sphenoides" Douglas et al. 1919

Etymology: sphe.no’i.des. Gr. masc. n. sphên (gen. sphênos), wedge; L. adj. suff. -oides, resembling, similar; from Gr. neut. adj. suff. -eides, resembling, similar; from Gr. neut. n. eîdos, that which is seen, form, shape, figure; N.L. fem. adj. sphenoides, wedge-shaped

Gender: feminine

Type strain: ATCC 19403; CIP 104283; DSM 632; JCM 1415; LMG 10390; NCCB 77027; NCIB 10627; NCIMB 10627; NCTC 507; Thorlby

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: X73449 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
    "Bacillus sphenoides" Douglas et al. 1919	homotypic synonym, not validly published, basonym of name in Approved Lists
    Clostridium sphenoides (Douglas et al. 1919) Bergey et al. 1923 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP
    Desulfotomaculum guttoideum Gogotova and Vainstein 1986	heterotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus Lacrimispora Haas and Blanchard 2020. 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.
  • ⏰ According to Haas and Blanchard (2020), this species is an earlier heterotypic synonym of Desulfotomaculum guttoideum Gogotova and Vainstein 1986. 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.
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: 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.
  • 😷 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 1 time 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 sphenoides (Douglas et al. 1919) Bergey et al. 1923 (Approved Lists 1980). Publication: Bergey DH, Harrison FC, Breed RS, Hammer BW, Huntoon FM. Bergey's Manual of Determinative Bacteriology, 1st ed. The Williams & Wilkins Co, Baltimore, 1923. Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Parent taxon: Lacrimispora 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: 5954