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Based on molecular data, a restricted\n                    <jats:italic>Ralfsia<\/jats:italic>\n                    sensu stricto was delineated\u00a0that had many species reassigned to new genera and families. The current work builds on that work by resolving the phylogenetic position, defining the morphological features, and establishing the biogeographic distribution of\n                    <jats:italic>Ralfsia pacifica<\/jats:italic>\n                    \u2014a crustose brown alga widely distributed along the eastern Pacific coastline. We employed mitochondrial COI\u20105P and plastid\n                    <jats:italic>rbc<\/jats:italic>\n                    L gene markers, together with morpho\u2010anatomical observations and comparisons with type material, to better understand this species and its distribution. Phylogenetic analyses positioned\n                    <jats:italic>R. pacifica<\/jats:italic>\n                    as a distinct lineage, sister to\n                    <jats:italic>Neoralfsia<\/jats:italic>\n                    within Neoralfsiaceae with moderate support. Significant molecular divergence from its nearest neighbor combined with a unique suite of morphological features\u2014crustose thallus lacking clear differentiation of the cortex and medulla, frequent hair pits, and slightly elevated but largely nonadventitious plurangial sori\u2014supported the establishment of\n                    <jats:italic>Fletcheria<\/jats:italic>\n                    gen. nov., with\n                    <jats:italic>Fletcheria pacifica<\/jats:italic>\n                    comb. nov. as the generitype, provisionally assigned to Neoralfsiaceae. The species was confirmed from British Columbia, Canada; California, United States; and central Chile, occupying intertidal habitats and reproducing year round with seasonal peaks. Based on morpho\u2010anatomical observations,\n                    <jats:italic>Ralfsia occidentalis<\/jats:italic>\n                    is excluded from synonymy with\n                    <jats:italic>F. pacifica<\/jats:italic>\n                    . Anatomical features, although limited, place it closer to the genus\n                    <jats:italic>Neoralfsia<\/jats:italic>\n                    .\n                  <\/jats:p>","DOI":"10.1111\/jpy.70241","type":"journal-article","created":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T08:25:25Z","timestamp":1790670325000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["<i>Fletcheria<\/i>\n                    gen. nov. (Ralfsiales, Phaeophyceae): A new crustose brown algal genus clarifying evolutionary relationships of\n                    <i>Ralfsia pacifica<\/i>"],"prefix":"10.1111","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2561-3757","authenticated-orcid":false,"given":"Viviana Patricia","family":"Reyes\u2010G\u00f3mez","sequence":"first","affiliation":[{"name":"Doctorado en Sistem\u00e1tica y Biodiversidad, Facultad de Ciencias Naturales y Oceanogr\u00e1ficas Universidad de Concepci\u00f3n  Concepci\u00f3n Chile"},{"name":"Laboratorio de Ficolog\u00eda Marina y Secci\u00f3n de Algas del Herbario de la Facultad de Ciencias Universidad Nacional Aut\u00f3noma de M\u00e9xico (UNAM)  Ciudad de M\u00e9xico M\u00e9xico"},{"name":"Laboratorio de Estudios Algales (ALGALAB), Facultad de Ciencias Naturales y Oceanogr\u00e1ficas Universidad de Concepci\u00f3n  Concepci\u00f3n Chile"},{"name":"Departamento de Ecolog\u00eda, Facultad de Ciencias Universidad Cat\u00f3lica de la Sant\u00edsima Concepci\u00f3n  Concepci\u00f3n Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Manuela I.","family":"Parente","sequence":"additional","affiliation":[{"name":"University of the Azores, Faculty of Sciences and Technology  Ponta Delgada Azores Portugal"},{"name":"CIBIO\/InBio, Research Center in Biodiversity and Genetic Resources, University of the Azores  Ponta Delgada Azores Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniel","family":"Le\u00f3n\u2010Alvarez","sequence":"additional","affiliation":[{"name":"Laboratorio de Ficolog\u00eda Marina y Secci\u00f3n de Algas del Herbario de la Facultad de Ciencias Universidad Nacional Aut\u00f3noma de M\u00e9xico (UNAM)  Ciudad de M\u00e9xico M\u00e9xico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Erasmo C.","family":"Macaya","sequence":"additional","affiliation":[{"name":"Laboratorio de Estudios Algales (ALGALAB), Facultad de Ciencias Naturales y Oceanogr\u00e1ficas Universidad de Concepci\u00f3n  Concepci\u00f3n Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4813-6831","authenticated-orcid":false,"given":"Gary W.","family":"Saunders","sequence":"additional","affiliation":[{"name":"Department of Biology, Centre for Environmental and Molecular Algal Research University of New Brunswick  Fredericton New Brunswick Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,9,29]]},"reference":[{"key":"e_1_2_9_2_1","first-page":"5","article-title":"Nya alger fr\u00e5n Mexico","volume":"4","author":"Agardh J. 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