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

Category: Species

Proposed as: comb. nov.

Basonym: Thermofilum uzonense Toshchakov et al. 2016

Etymology: u.zo.nen’se. N.L. neut. adj. uzonense, pertaining to the Uzon Caldera, Kamchatka, FarEast 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: Zayulina KS, Elcheninov AG, Toshchakov SV, Kochetkova TV, Novikov AA, Blamey JM, Kublanov IV. Novel hyperthermophilic crenarchaeon Infirmifilum lucidum gen. nov. sp. nov., reclassification of Thermofilum uzonense as Infirmifilum uzonense comb. nov. and assignment of the family Thermofilaceae to the order Thermofilales ord. nov. Syst Appl Microbiol 2021; 44:126230.

IJSEM list: Oren A, Göker M. Validation list no. 219. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2024; 74:6452.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Synonyms:

  • Name	Kind
    Thermofilum uzonense Toshchakov et al. 2016	homotypic synonym, validly published under the ICNP

• Notes:
  • 🎓 Name mentioned 3 times in PubMed until 2025-10-14.

Parent taxon: Infirmifilum Zayulina et al. 2024

Assigned by: Zayulina KS, Elcheninov AG, Toshchakov SV, Kochetkova TV, Novikov AA, Blamey JM, Kublanov IV. Novel hyperthermophilic crenarchaeon Infirmifilum lucidum gen. nov. sp. nov., reclassification of Thermofilum uzonense as Infirmifilum uzonense comb. nov. and assignment of the family Thermofilaceae to the order Thermofilales ord. nov. Syst Appl Microbiol 2021; 44:126230.

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Record number: 53927