Species Clostridium thermohydrosulfuricum

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

Category: Species

Proposed as: sp. nov.

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

Pronunciation (Latin), gender: klos-TRI-di-um t^her-mo-hy-dro-sul-FU-ri-kum, neuter

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

16S rRNA gene: L09161 Analyse FASTA

Effective publication: Klaushofer H, Parkkinen E. Zur Frage der Bedeutung aerober und anaerober thermophiler Sporenbildner als Infektionsursache in Rübenzuckerfabriken. I. Clostridium thermohydrosulfuricum, eine neue Art eines saccharoseabbauenden, thermophilen, schwefelwasserstoffbildenden Clostridiums. Zeitschrift für die Zuckerindustrie 1965; 15:445-449.

IJSEM list: Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Nomenclatural status: validly published under the ICNP

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

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

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
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
Thermoanaerobacter thermohydrosulfuricus (Klaushofer and Parkkinen 1965) Lee et al. 1993	homotypic synonym, validly published under the ICNP

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.
- ❗ Clostridium thermohydrosulfuricum 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 Clostridium.
- 😷 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 57 times 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.

Parent taxon: Clostridium Prazmowski 1880 (Approved Lists 1980)

Assigned by: Klaushofer H, Parkkinen E. Zur Frage der Bedeutung aerober und anaerober thermophiler Sporenbildner als Infektionsursache in Rübenzuckerfabriken. I. Clostridium thermohydrosulfuricum, eine neue Art eines saccharoseabbauenden, thermophilen, schwefelwasserstoffbildenden Clostridiums. Zeitschrift für die Zuckerindustrie 1965; 15:445-449.

Linking: To permanently link to this page, use https://doi.org/10.83108/rn.775009Link copied to clipboard

Record number: 775009

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Species Clostridium thermohydrosulfuricum