{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T11:18:43Z","timestamp":1789643923814,"version":"4.0.0"},"reference-count":76,"publisher":"Pensoft Publishers","license":[{"start":{"date-parts":[[2025,4,25]],"date-time":"2025-04-25T00:00:00Z","timestamp":1745539200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["PK"],"abstract":"<jats:p>The current article introduces and describes <jats:italic>Haslea berepwari<\/jats:italic><jats:bold>sp. nov.<\/jats:bold>, a new species of diatom discovered in the vicinity of Boulouparis, New Caledonia. Under light microscopy, <jats:italic>H. berepwari<\/jats:italic><jats:bold>sp. nov.<\/jats:bold> strongly resembles <jats:italic>Haslea pseudostrearia<\/jats:italic>, but preliminary molecular barcoding conducted using partial 18S and <jats:italic>rbcL<\/jats:italic> genes suggested that it was a distinct species. This was confirmed first by scanning electron microscopy which showed the differences in stria densities between both species. A short-reads genome-skimming protocol applied on <jats:italic>H. berepwari<\/jats:italic><jats:bold>sp. nov.<\/jats:bold> led us to obtain its complete mitochondrial and plastid genomes. The mitogenome is 36,572 bp in length and as already observed among other species of <jats:italic>Haslea<\/jats:italic> spp., the <jats:italic>nad6<\/jats:italic> and <jats:italic>nad2<\/jats:italic> genes are fused within a single open-reading frame. The plastome is 131,897 bp length, and unlike the mitogenome, it is not colinear with those of <jats:italic>H. pseudostrearia<\/jats:italic>. The results derived from the sequencing of the plastome allowed to perform a 123-gene multigene maximum likelihood phylogeny that associates <jats:italic>H. berepwari<\/jats:italic><jats:bold>sp. nov.<\/jats:bold> to <jats:italic>H. pseudostrearia<\/jats:italic> with maximum support at the nodes but also strictly distinguishes them, suggesting a greater genetic distance between these species than what has been previously observed between other marennine-producing species.<\/jats:p>","DOI":"10.3897\/phytokeys.255.144697","type":"journal-article","created":{"date-parts":[[2025,4,25]],"date-time":"2025-04-25T12:59:14Z","timestamp":1745585954000},"page":"215-234","source":"Crossref","is-referenced-by-count":2,"title":["Diving into Diversity: Haslea berepwari (Bacillariophyceae, Naviculaceae), a new species of marine diatom from New Caledonia"],"prefix":"10.3897","volume":"255","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6474-2319","authenticated-orcid":true,"given":"Fiddy 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