Name: Thermofilum uzonense Toshchakov et al. 2016

Category: Species

Proposed as: sp. nov.

Etymology: u.zo.nen’se. N.L. neut. adj. uzonense, pertaining to the Uzon Caldera, Kamchatka, Far-East Russia, from where the type strain was isolated

Pronunciation, gender: u-zo-NEN-se, neuter

Type strain: 1807-2; DSM 28062; JCM 19810

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: CP009961 Analyse FASTA

Effective publication: Toshchakov SV, Korzhenkov AA, Samarov NI, Mazunin IO, Mozhey OI, Shmyr IS, Derbikova KS, Taranov EA, Dominova IN, Bonch-Osmolovskaya EA, et al. Complete genome sequence of and proposal of Thermofilum uzonense sp. nov. a novel hyperthermophilic crenarchaeon and emended description of the genus Thermofilum. Stand Genomic Sci 2015; 10:122.

IJSEM list: Oren A, Garrity GM. Validation list no. 169. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2016; 66:1913-1915.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Infirmifilum uzonense (Toshchakov et al. 2016) Zayulina et al. 2024

Risk group: 1

• Synonyms:

  • Name	Kind
    Infirmifilum uzonense (Toshchakov et al. 2016) Zayulina et al. 2024	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Thermofilum uzonense 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 Thermofilum.
  • 😷 The risk group for Germany has been imported on 2023-10-29. 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 2 times in PubMed until 2025-06-04.

Parent taxon: Thermofilum Zillig and Gierl 1983

Assigned by: Toshchakov SV, Korzhenkov AA, Samarov NI, Mazunin IO, Mozhey OI, Shmyr IS, Derbikova KS, Taranov EA, Dominova IN, Bonch-Osmolovskaya EA, et al. Complete genome sequence of and proposal of Thermofilum uzonense sp. nov. a novel hyperthermophilic crenarchaeon and emended description of the genus Thermofilum. Stand Genomic Sci 2015; 10:122.

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Record number: 794100