Species Thermoanaerobacter thermohydrosulfuricus

Name: Thermoanaerobacter thermohydrosulfuricus (Klaushofer and Parkkinen 1965) Lee et al. 1993

Category, proposed as: species, comb. nov.

Basonym: Clostridium thermohydrosulfuricum Klaushofer and Parkkinen 1965 (Approved Lists 1980)

Etymology: ther.mo.hy.dro.sul.fu’ri.cus. Gr. masc. adj. thermos, hot; N.L. masc. adj. hydrosulfuricus, pertaining to hydrogen sulfide; N.L. masc. adj. thermohydrosulfuricus, indicating that the organism grows at high temperatures and reduces sulfite to H2S.

Pronunciation (Latin), gender: t^her-mo-an-a-e-ro-BAK-ter t^her-mo-hy-dro-sul-FU-ri-kus, masculine

Type strain: ATCC 35045; CECT 594; DSM 567; E100-69; LMG 6659; NCIB 10956; NCIMB 10956

Conduct genome-based taxonomy at

16S rRNA gene: L09161 Analyse FASTA

Valid publication: Lee YE, Jain MK, Lee C, Lowe SE, Zeikus JG. Taxonomic distinction of saccharolytic thermophilic anaerobes: description of Thermoanaerobacterium xylanolyticum gen. nov., sp. nov., and Thermoanaerobacterium saccharolyticum gen. nov., sp. nov.; reclassification of Thermoanaerobium brockii, Clostridium thermosulfurogenes, and Clostridium thermohydrosulfuricum E100-69 as Thermoanaerobacter brockii comb. nov., Thermoanaerobacterium thermosulfurigenes comb. nov., and Thermoanaerobacter thermohydrosulfuricus comb. nov., respectively; and transfer of Clostridium thermohydrosulfuricum 39E to Thermoanaerobacter ethanolicus. Int. J. Syst. Bacteriol. 1993; 43:41-51. 🇰🇷

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 43, part 1 of the IJSB. Int J Syst Bacteriol 1993; 43:399.

Nomenclatural status: validly published under the ICNP

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

Risk group: 1

• Synonyms:

  • Name	Kind
    Thermoanaerobacter ethanolicus subsp. thermohydrosulfuricus (Klaushofer and Parkkinen 1965) Bing 2026	homotypic synonym, validly published under the ICNP, distinct rank
    Clostridium thermohydrosulfuricum Klaushofer and Parkkinen 1965 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP
    Thermoanaerobacter siderophilus Slobodkin et al. 1999	heterotypic synonym, validly published under the ICNP
    "Thermoanaerobacter ethanolicus subsp. siderophilus" (Slobodkin et al. 1999) Bing 2024	heterotypic synonym, not validly published, distinct rank
    Thermoanaerobacter ethanolicus Wiegel and Ljungdahl 1982	heterotypic synonym, validly published under the ICNP

• Emendations:
  • Bouras et al. 2026 Bouras N, Dif G, Belghit S, Nguyen SV, Jacobs JL, Toumatia O, Ebada SS, Nouioui I. Genome-based reclassification of the genus Thermoanaerobacter: taxonomic emendations and new combinations. Anaerobe 2026; 0:103027. 🇩🇿 Oren A, Göker M. List of changes in taxonomic opinion no. 44. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2026; 76:7140.
    Notes:
    • 🫂 Emendation accompanied by 2 proposals regarding the synonymy of the species.

• Notes:
  • ⏰ According to Bouras et al. (2026), this species is an earlier heterotypic synonym of Thermoanaerobacter ethanolicus Wiegel and Ljungdahl 1982. Publication: Bouras N, Dif G, Belghit S, Nguyen SV, Jacobs JL, Toumatia O, Ebada SS, Nouioui I. Genome-based reclassification of the genus Thermoanaerobacter: taxonomic emendations and new combinations. Anaerobe 2026; 0:103027. 🇩🇿
  • ⏰ According to Bouras et al. (2026), this species is an earlier heterotypic synonym of Thermoanaerobacter siderophilus Slobodkin et al. 1999. Publication: Bouras N, Dif G, Belghit S, Nguyen SV, Jacobs JL, Toumatia O, Ebada SS, Nouioui I. Genome-based reclassification of the genus Thermoanaerobacter: taxonomic emendations and new combinations. Anaerobe 2026; 0:103027. 🇩🇿
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Göker M. List of changes in taxonomic opinion no. 44. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2026; 76:7140.
  • 😷 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 25 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.

Subdivision:

Number of child taxa with a validly published and correct name: 0
Number of child taxa with a validly published name, including synonyms: 2
Total number of child taxa: 3

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    "Thermoanaerobacter thermohydrosulfuricus subsp. carboxydovorans" Balk et al. 2009	not validly published	preferred name
    Thermoanaerobacter thermohydrosulfuricus subsp. thermohydrosulfuricus (Klaushofer and Parkkinen 1965) Bouras et al. 2026	validly published under the ICNP	synonym of its species
    Thermoanaerobacter thermohydrosulfuricus subsp. wiegelii (Cook et al. 1996) Bouras et al. 2026	validly published under the ICNP	synonym

Parent taxon: Thermoanaerobacter Wiegel and Ljungdahl 1982

Assigned by: Lee YE, Jain MK, Lee C, Lowe SE, Zeikus JG. Taxonomic distinction of saccharolytic thermophilic anaerobes: description of Thermoanaerobacterium xylanolyticum gen. nov., sp. nov., and Thermoanaerobacterium saccharolyticum gen. nov., sp. nov.; reclassification of Thermoanaerobium brockii, Clostridium thermosulfurogenes, and Clostridium thermohydrosulfuricum E100-69 as Thermoanaerobacter brockii comb. nov., Thermoanaerobacterium thermosulfurigenes comb. nov., and Thermoanaerobacter thermohydrosulfuricus comb. nov., respectively; and transfer of Clostridium thermohydrosulfuricum 39E to Thermoanaerobacter ethanolicus. Int. J. Syst. Bacteriol. 1993; 43:41-51. 🇰🇷

Linking: To permanently link to this page, use https://doi.org/10.83108/rn.782516Copy to clipboardLink copied to clipboard

Record number: 782516

• Previous versions:

  • Version	Date	JSON
    1	2026-03-31
    2	2026-08-04