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Helminthol."],"published-print":{"date-parts":[[2026]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Between 2019 and 2025, metacercariae of the trematode genus\n                    <jats:italic>Lecithocladium<\/jats:italic>\n                    (Hemiuridae) were found in gelatinous zooplankters occurring in Japanese coastal waters. To identify these metacercariae and elucidate their life cycles, fish hosts were simultaneously examined for adult trematodes. Molecular analyses of the nuclear 28S ribosomal RNA (rRNA) and mitochondrial cytochrome\n                    <jats:italic>c<\/jats:italic>\n                    oxidase subunit 1 (COI) regions, comparing them with adult\n                    <jats:italic>Lecithocladium<\/jats:italic>\n                    species from fish hosts, confirmed the metacercariae as those of\n                    <jats:italic>L. magnacetabulum<\/jats:italic>\n                    and\n                    <jats:italic>L.<\/jats:italic>\n                    cf.\n                    <jats:italic>excisiforme.<\/jats:italic>\n                    Metacercariae of\n                    <jats:italic>L. magnacetabulum<\/jats:italic>\n                    were detected in the comb jelly\n                    <jats:italic>Beroe cucumis<\/jats:italic>\n                    and the jellyfish\n                    <jats:italic>Aequorea coerulescens<\/jats:italic>\n                    ; adults of this species had previously been recorded in the Japanese butterfish\n                    <jats:italic>Psenopsis anomala<\/jats:italic>\n                    and the red seabream\n                    <jats:italic>Pagrus major.<\/jats:italic>\n                    For\n                    <jats:italic>L.<\/jats:italic>\n                    cf.\n                    <jats:italic>excisiforme<\/jats:italic>\n                    , metacercariae were detected in the arrow worm\n                    <jats:italic>Aidanosagitta crassa<\/jats:italic>\n                    and an adult in the whitetongue jack\n                    <jats:italic>Uraspis helvola.<\/jats:italic>\n                    These predatory gelatinous zooplankters are presumed to be the third (or higher) intermediate or paratenic hosts, given that their prey, planktonic copepods, are typically reported as the second intermediate hosts for hemiurid species. Furthermore, adults of two additional hemiurid species,\n                    <jats:italic>L. excisum<\/jats:italic>\n                    and\n                    <jats:italic>Ectenurus trachuri<\/jats:italic>\n                    , were also isolated from the fish hosts. Cumulatively, this work and previous research suggest that gelatinous zooplankters represent crucial transmission routes for hemiurid trematodes.\n                  <\/jats:p>","DOI":"10.1017\/s0022149x26101230","type":"journal-article","created":{"date-parts":[[2026,5,28]],"date-time":"2026-05-28T07:19:57Z","timestamp":1779952797000},"source":"Crossref","is-referenced-by-count":0,"title":["Metacercariae of\n                    <i>Lecithocladium<\/i>\n                    (Trematoda: Hemiuridae) species in gelatinous zooplankters from Japanese coastal waters, with information of adult stages"],"prefix":"10.1017","volume":"100","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6955-5694","authenticated-orcid":false,"given":"T.","family":"Waki","sequence":"first","affiliation":[{"name":"Toho University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"H.","family":"Sekine","sequence":"additional","affiliation":[{"name":"Toho University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3063-6029","authenticated-orcid":false,"given":"M.","family":"Nitta","sequence":"additional","affiliation":[{"name":"Fisheries Technology Institute"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S.","family":"Toshino","sequence":"additional","affiliation":[{"name":"Kuroshio Biological Research Foundation"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1033-3445","authenticated-orcid":false,"given":"T.","family":"Takano","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"T.","family":"Okawa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M.","family":"Taru","sequence":"additional","affiliation":[{"name":"Toho University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"T.","family":"Ojima","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M.","family":"Ojima","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Y.","family":"Kondo","sequence":"additional","affiliation":[{"name":"Hiroshima Institute of Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S.","family":"Ohtsuka","sequence":"additional","affiliation":[{"name":"Hiroshima University"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2026,5,28]]},"reference":[{"key":"S0022149X26101230_r66","first-page":"9","article-title":"Distribution of the butter fish, Psenopsis anomala (Temmink and Schlegel), in the Southeast Waters of the Goto Islands","volume":"12","author":"Tashiro","year":"1986","journal-title":"Bulletin of Nagasaki Prefectural Institute of Fisheries"},{"key":"S0022149X26101230_r4","doi-asserted-by":"publisher","DOI":"10.1080\/19768354.2014.907206"},{"key":"S0022149X26101230_r35","first-page":"123","article-title":"Trophic interactions between two neustonic organisms: insights from Bayesian stable isotope data analysis tools","volume":"146","author":"Lepoint","year":"2016","journal-title":"Belgian Journal of Zoology"},{"key":"S0022149X26101230_r69","first-page":"255","article-title":"The importance of small planktonic copepods and their roles in pelagic marine food webs","volume":"43","author":"Turner","year":"2004","journal-title":"Zoological Studies"},{"key":"S0022149X26101230_r34","doi-asserted-by":"publisher","DOI":"10.1515\/9781503623088"},{"key":"S0022149X26101230_r49","doi-asserted-by":"publisher","DOI":"10.1007\/s002270000459"},{"key":"S0022149X26101230_r27","doi-asserted-by":"publisher","DOI":"10.1007\/BF00927847"},{"key":"S0022149X26101230_r14","doi-asserted-by":"publisher","DOI":"10.1016\/j.cub.2025.05.066"},{"key":"S0022149X26101230_r30","doi-asserted-by":"publisher","DOI":"10.1016\/0020-7519(91)90065-F"},{"key":"S0022149X26101230_r36","doi-asserted-by":"publisher","DOI":"10.1006\/mpev.2000.0802"},{"key":"S0022149X26101230_r52","volume-title":"Fishes of Japan with Pictorial Keys to the Species","author":"Nakabo","year":"2013"},{"key":"S0022149X26101230_r56","doi-asserted-by":"publisher","DOI":"10.1016\/S0020-7519(03)00049-3"},{"key":"S0022149X26101230_r18","first-page":"1","article-title":"The Hemiuridae (Digenea) of fishes from the north-east Atlantic","volume":"51","author":"Gibson","year":"1986","journal-title":"Bulletin of the British Museum (Natural History), Zoology"},{"key":"S0022149X26101230_r20","volume-title":"Parasitism: the Diversity and Ecology of Animal Parasites","author":"Goater","year":"2014"},{"key":"S0022149X26101230_r28","doi-asserted-by":"publisher","DOI":"10.1007\/BF00931131"},{"key":"S0022149X26101230_r2","doi-asserted-by":"publisher","DOI":"10.1139\/z88-280"},{"key":"S0022149X26101230_r73","unstructured":"WoRMS (2025) Lecithocladium L\u00fche, 1901. 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