{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,3]],"date-time":"2026-07-03T17:16:16Z","timestamp":1783098976815,"version":"3.54.6"},"reference-count":30,"publisher":"Microbiology Society","issue":"7","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,7,3]]},"abstract":"\n A facultatively anaerobic, thermophilic, Gram-negative bacterium, strain sy37\n T<\/jats:sup>\n , isolated from a deep-sea hydrothermal field and belonging to the candidate phylum WOR-3, was characterized in detail. The cells were non-motile long rods with pili and grew via respiration with 2\u201310% (v\/v) oxygen and elemental sulphur as electron acceptors. Optimum growth was observed at 75\u2009\u00b0C, pH 6.0 and 3.5% (w\/v) NaCl with a doubling time of 10\u2009h. iso-C\n 17\u200a:\u200a0<\/jats:sub>\n was found to be the major fatty acid and menaquinone-8 was identified as the major respiratory quinone. The G+C content of the genomic DNA was 60.6\u2009mol%. Based on the results of phylogenetic analyses of the 16S rRNA gene and genome sequences, together with the phenotypic characterization of strain sy37\n T<\/jats:sup>\n , we propose the name\n Caldifarcimen microaerophilum<\/jats:italic>\n gen. nov., sp. nov. for strain sy37\n T<\/jats:sup>\n (=NBRC 116057\n T<\/jats:sup>\n =BCRC 81450\n T<\/jats:sup>\n ). In addition, we propose the associated family, order, class and phylum as\n Caldifarciminaceae<\/jats:italic>\n fam. nov.,\n Caldifarciminales<\/jats:italic>\n ord. nov.,\n Caldifarciminia<\/jats:italic>\n classis nov. and\n Caldifarciminota<\/jats:italic>\n phyl. nov., respectively, in the bacterial kingdom\n Pseudomonadati<\/jats:italic>\n .\n <\/jats:p>","DOI":"10.1099\/ijsem.0.007229","type":"journal-article","created":{"date-parts":[[2026,7,3]],"date-time":"2026-07-03T16:16:42Z","timestamp":1783095402000},"source":"Crossref","is-referenced-by-count":0,"title":["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."],"prefix":"10.1099","volume":"76","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-8238-263X","authenticated-orcid":false,"given":"Koji","family":"Mori","sequence":"first","affiliation":[{"name":"NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), 2-5-8 Kazusakamatari, Kisarazu, Chiba 292-0818, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kohei","family":"Hidaka","sequence":"additional","affiliation":[{"name":"NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), 2-5-8 Kazusakamatari, Kisarazu, Chiba 292-0818, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3275-9033","authenticated-orcid":false,"given":"Satoshi","family":"Tamazawa","sequence":"additional","affiliation":[{"name":"NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), 2-5-8 Kazusakamatari, Kisarazu, Chiba 292-0818, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Akira","family":"Hosoyama","sequence":"additional","affiliation":[{"name":"NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), 2-5-8 Kazusakamatari, Kisarazu, Chiba 292-0818, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9208-1247","authenticated-orcid":false,"given":"Hideyuki","family":"Tamaki","sequence":"additional","affiliation":[{"name":"Biomanufacturing Process Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takeshi","family":"Kakegawa","sequence":"additional","affiliation":[{"name":"Tohoku University, Sendai, Miyagi 980-8578, 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