Species Thermoanaerobacter brockii

Name: Thermoanaerobacter brockii (Zeikus et al. 1983) Lee et al. 1993

Category, proposed as: species, comb. nov.

Basonym: Thermoanaerobium brockii Zeikus et al. 1983

Etymology: broc’ki.i. N.L. gen. masc. n. brockii, of Brock, named for Thomas Dale Brock who pioneered studies on the physiology and ecology of thermophiles

Pronunciation (Latin), gender: t^her-mo-an-a-e-ro-BAK-ter BROK-ki-i, masculine

Type strain: ATCC 33075; ATCC 53556; DSM 1457; HTD 4

16S rRNA gene: X58349 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

Risk group: 1

• Synonyms:

  • Name	Kind
    Thermoanaerobacter brockii subsp. finnii (Schmid et al. 1986) Cayol et al. 1995	heterotypic synonym, validly published under the ICNP, distinct rank
    Thermoanaerobium brockii Zeikus et al. 1983	homotypic synonym, validly published under the ICNP
    Thermoanaerobacter pseudethanolicus Onyenwoke et al. 2007	heterotypic synonym, validly published under the ICNP
    "Thermoanaerobacter pseudethanolicus subsp. finnii" (Schmid et al. 1986) Bing 2024	heterotypic synonym, not validly published, distinct rank
    Thermoanaerobacter brockii subsp. lactiethylicus Cayol et al. 1995	heterotypic synonym, validly published under the ICNP, distinct rank
    Thermoanaerobacter finnii Schmid et al. 1986	heterotypic synonym, validly published under the ICNP

• Emendations:
  • Cayol et al. 1995 Cayol JL, Ollivier B, Patel BK, Ravot G, Magot M, Ageron E, Grimont PA, Garcia JL. Description of Thermoanaerobacter brockii subsp. lactiethylicus subsp. nov., isolated from a deep subsurface French oil well, a proposal to reclassify Thermoanaerobacter finnii as Thermoanaerobacter brockii subsp. finnii comb. nov., and an emended description of Thermoanaerobacter brockii. Int J Syst Bacteriol 1995; 45:783-789. 🇫🇷 Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 45, part 4 of the IJSB. Int J Syst Bacteriol 1996; 46:364-365.
    Notes:
    • 📧 The e-mail address of the corresponding author given in the associated publication is not functional any more.
  • 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 3 proposals regarding the synonymy of the species.

• Notes:
  • ⏰ According to Bouras et al. (2026), this species is an earlier heterotypic synonym of Thermoanaerobacter finnii Schmid et al. 1986. 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 pseudethanolicus Onyenwoke et al. 2007. 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. — 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 70 times in PubMed until 2026-06-11.

Subdivision:

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

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Thermoanaerobacter brockii subsp. brockii (Zeikus et al. 1983) Cayol et al. 1995	validly published under the ICNP	synonym of its species
    Thermoanaerobacter brockii subsp. finnii (Schmid et al. 1986) Cayol et al. 1995	validly published under the ICNP	synonym
    Thermoanaerobacter brockii subsp. lactiethylicus Cayol et al. 1995	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.785058Copy to clipboardLink copied to clipboard

Record number: 785058

• Previous versions:

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