Name: Caldifarciminaceae Mori et al. 2026

Category: Family

Proposed as: fam. nov.

Etymology: Cal.di.far.ci.mi.na’ce.ae. N.L. neut. n. Caldifarcimen, a genus name; L. fem. pl. n. suff. -aceae, ending to denote a family; N.L. fem. pl. n. Caldifarciminaceae, the Calidifarcimen family

Pronunciation (Latin), gender: kal-di-far-ki-mi-NA-ke-a͡e, feminine

Type genus: Caldifarcimen Mori et al. 2026

Valid publication: Mori K, Hidaka K, Tamazawa S, Hosoyama A, Tamaki H, Kakegawa T, Hanada S. Caldifarcimen microaerophilum gen. nov., sp. nov., a facultatively anaerobic, thermophilic bacterium of a novel bacterial phylum, Caldifarciminota phyl. nov., formerly called candidate phylum WOR-3, description of Caldifarciminaceae fam. nov., Caldifarciminales ord. nov. and Caldifarciminia classis nov. Int J Syst Evol Microbiol 2026; 76:7229. 🇯🇵

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Synonyms:

  • Name	Kind
    "Candidatus Hydrothermaceae" Chuvochina et al. 2019	heterotypic synonym, not pro-validly published
    "Candidatus Hydrothermaceae" Chuvochina et al. 2023	heterotypic synonym, not pro-validly published

• Notes:
  • 🧕 Mori et al. (2026) assigned this family to the class Caldifarciminia Mori et al. 2026. Publication: Mori K, Hidaka K, Tamazawa S, Hosoyama A, Tamaki H, Kakegawa T, Hanada S. Caldifarcimen microaerophilum gen. nov., sp. nov., a facultatively anaerobic, thermophilic bacterium of a novel bacterial phylum, Caldifarciminota phyl. nov., formerly called candidate phylum WOR-3, description of Caldifarciminaceae fam. nov., Caldifarciminales ord. nov. and Caldifarciminia classis nov. Int J Syst Evol Microbiol 2026; 76:7229. 🇯🇵
  • 🧕 Mori et al. (2026) assigned this family to the phylum Caldifarciminota Mori et al. 2026. Publication: Mori K, Hidaka K, Tamazawa S, Hosoyama A, Tamaki H, Kakegawa T, Hanada S. Caldifarcimen microaerophilum gen. nov., sp. nov., a facultatively anaerobic, thermophilic bacterium of a novel bacterial phylum, Caldifarciminota phyl. nov., formerly called candidate phylum WOR-3, description of Caldifarciminaceae fam. nov., Caldifarciminales ord. nov. and Caldifarciminia classis nov. Int J Syst Evol Microbiol 2026; 76:7229. 🇯🇵
  • 🎰 The BRCs most frequently used for deposits in this group are: NBRC: 1; BCRC: 1.

Subdivision:

Number of child taxa with a validly published and correct name: 1
Number of child taxa with a validly published name, including synonyms: 1
Total number of child taxa: 5

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Caldifarcimen Mori et al. 2026	validly published under the ICNP	correct name
    "Candidatus Caldipriscus" Colman et al. 2016	not validly published	pro-correct name
    "Candidatus Hydrothermus" Chuvochina et al. 2023	not validly published	synonym
    "Candidatus Hydrothermus" Chuvochina et al. 2019	not validly published	pro-correct name
    "Candidatus Thermoproauctor" Colman et al. 2016	not validly published	pro-correct name

Parent taxon: Caldifarciminales Mori et al. 2026

Assigned by: Mori K, Hidaka K, Tamazawa S, Hosoyama A, Tamaki H, Kakegawa T, Hanada S. Caldifarcimen microaerophilum gen. nov., sp. nov., a facultatively anaerobic, thermophilic bacterium of a novel bacterial phylum, Caldifarciminota phyl. nov., formerly called candidate phylum WOR-3, description of Caldifarciminaceae fam. nov., Caldifarciminales ord. nov. and Caldifarciminia classis nov. Int J Syst Evol Microbiol 2026; 76:7229. 🇯🇵

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Record number: 72801