Species Thermobacteroides leptospartum

Name: Thermobacteroides leptospartum Toda et al. 1989

Category, proposed as: species, sp. nov.

Etymology: lep.to.spar’tum. Gr. masc. adj. leptos, thin, delicate, small; L. neut. n. spartum, rope made of broom; N.L. neut. n. leptospartum, a thin rope (nominative in apposition)

Pronunciation (Latin), gender: t^her-mo-bak-ter-o-I-des lep-to-SPAR-tum, masculine

Type strain: ATCC 51338; C-17-70; DSM 9219; IAM 13499; JCM 9762

Conduct genome-based taxonomy at

16S rRNA gene: AB572913 Analyse FASTA

Effective publication: Toda Y, Saiki T, Uozumi T, Beppu T. Isolation and characterization of a protease-producing, thermophilic, anaerobic bacterium, Thermobacteroides leptospartum sp. nov. Agric. Biol. Chem. 1988; 52:1339-1344.

IJSEM list: Anonymous. Validation list no. 28. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1989; 39:93-94.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym (and not recommended for medical use)

Correct name: Thermoclostridium stercorarium subsp. leptospartum (Toda et al. 1989) Zhang et al. 2018

Risk group: 1

• Synonyms:

  • Name	Kind
    Clostridium stercorarium subsp. leptospartum (Toda et al. 1989) Fardeau et al. 2001	homotypic synonym, validly published under the ICNP, distinct rank
    Thermoclostridium stercorarium subsp. leptospartum (Toda et al. 1989) Zhang et al. 2018	homotypic synonym, validly published under the ICNP, distinct rank

• Notes:
  • ❗ Thermobacteroides leptospartum is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Thermobacteroides.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1. — 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 a synonym of the name to be applied to this species. The name is on LoRN because of the recorded risk group of the genus.
  • 🧍 The transfer of Thermobacteroides acetoethylicus Ben-Bassat and Zeikus 1983 (the type species of the genus Thermobacteroides) to the genus Thermoanaerobacter as Thermoanaerobacter acetoethylicus (Ben-Bassat and Zeikus 1983) Rainey and Stackebrandt 1993, invalidates the genus Thermobacteroides. The species Thermobacteroides proteolyticus Ollivier et al. 1985 has been transferred in the new genus Coprothermobacter as Coprothermobacter proteolyticus (Ollivier et al. 1985) Rainey and Stackebrandt 1993, comb. nov. However, the phylogenetic position of the third species of the genus Thermobacteroides, Thermobacteroides leptospartum Toda et al. 1989, cannot be determined because the type strain (strain C-17-70 = IAM 13499) was unavailable. Publication: Rainey FA, Stackebrandt E. Transfer of the type species of the genus Thermobacteroides to the genus Thermoanaerobacter as Thermoanaerobacter acetoethylicus (Ben-Bassat and Zeikus 1981) comb. nov., description of Coprothermobacter gen. nov., and reclassification of Thermobacteroides proteolyticus as Coprothermobacter proteolyticus (Ollivier et al. 1985) comb. nov. Int. J. Syst. Bacteriol. 1993; 43:857-859. 🇩🇪

Parent taxon: Thermobacteroides Ben-Bassat and Zeikus 1983

Assigned by: Toda Y, Saiki T, Uozumi T, Beppu T. Isolation and characterization of a protease-producing, thermophilic, anaerobic bacterium, Thermobacteroides leptospartum sp. nov. Agric. Biol. Chem. 1988; 52:1339-1344.

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Record number: 782541