Name: Caldifarciminota Mori et al. 2026
Etymology: Cal.di.far.ci.mi.no’ta. N.L. neut. n. Caldifarcimen, a genus name; L. neut. pl. n. suff. -ota, ending to denote a phylum; N.L. neut. pl. n. Caldifarciminota, the Caldifarcimen phylum
Pronunciation (Latin), gender: kal-di-far-ki-mi-NO-ta, neuter
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. 
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Nomenclatural status: validly published under the ICNP
Taxonomic status: correct name
| Name | Kind |
|---|---|
| "Candidatus Pyropristinus" Colman et al. 2016 | heterotypic synonym, inaccurate spelling |
| "Candidatus Caldipriscota" corrig. Colman et al. 2016 | heterotypic synonym, pro-validly published under the ICNP |
| "Candidatus Hydrothermae" Jungbluth et al. 2017 | heterotypic synonym, inaccurate spelling |
| "Candidatus Hydrothermota" corrig. Jungbluth et al. 2017 | heterotypic synonym, pro-validly published under the ICNP |
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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: 4
| Name | Nomenclatural status | Taxonomic status |
|---|---|---|
| Caldifarciminia Mori et al. 2026 | validly published under the ICNP | correct name |
| "Candidatus Hydrothermia" Chuvochina et al. 2019 | not validly published | synonym |
| "Candidatus Hydrothermia" Chuvochina et al. 2023 | not validly published | synonym |
| "Candidatus Tepidihabitantia" Slobodkina et al. 2025 | not validly published | preferred name |
Parent taxon: Pseudomonadati (Gibbons and Murray 1978) Oren and Göker 2024
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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