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Helminthol."],"published-print":{"date-parts":[[2026]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    A new species of\n                    <jats:italic>Calicotyle<\/jats:italic>\n                    (Monogenea: Monocotylidae) is described from three deepwater catshark species (Elasmobranchii: Pentanchidae) collected off Iceland.\n                    <jats:italic>Calicotyle carmenae<\/jats:italic>\n                    n. sp. is diagnosed as a species of\n                    <jats:italic>Calicotyle<\/jats:italic>\n                    possessing a haptor with one central and seven peripheral loculi, two hamuli, and several hooklets. It is distinguished from all congeners by the absence of eye spots, having a once-looped male copulatory organ, two U-shaped vaginae, and intercaecal vaginal pores. A molecular phylogenetic analysis based on 28S ribosomal DNA sequences placed\n                    <jats:italic>Calicotyle carmenae<\/jats:italic>\n                    n. sp. within a clade of other\n                    <jats:italic>Calicotyle<\/jats:italic>\n                    species infecting selachians and holocephalans, while revealing clear genetic divergence from these congeners (8.2\u201311.1%; 74\u201399 bp). In addition, the morphology and host specificity of\n                    <jats:italic>C. carmenae<\/jats:italic>\n                    and its congeners are discussed. Some inconsistencies and insufficiently described anatomical features in other species of the subfamily Calicotylinae are highlighted, which evidence a need for a revision of this taxon. The study also provides the first record of a species of\n                    <jats:italic>Calicotyle<\/jats:italic>\n                    from pentanchid sharks, highlighting the potential for further discoveries as research expands into different hosts and deeper, underexplored marine ecosystems.\n                  <\/jats:p>","DOI":"10.1017\/s0022149x26101527","type":"journal-article","created":{"date-parts":[[2026,5,29]],"date-time":"2026-05-29T08:13:08Z","timestamp":1780042388000},"source":"Crossref","is-referenced-by-count":0,"title":["Hidden in the dark: description of\n                    <i>Calicotyle carmenae<\/i>\n                    n. sp. (Monogenea: Monocotylidae) from deepwater catsharks (Elasmobranchii: Pentanchidae) off Iceland"],"prefix":"10.1017","volume":"100","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-7819-416X","authenticated-orcid":false,"given":"Andrea","family":"Higueruelo","sequence":"first","affiliation":[{"name":"Universitat Aut\u00f2noma de Barcelona"},{"name":"St. George\u2019s University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2030-811X","authenticated-orcid":false,"given":"Sara","family":"Dallar\u00e9s","sequence":"additional","affiliation":[{"name":"Universitat Aut\u00f2noma de Barcelona"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3399-6345","authenticated-orcid":false,"given":"Bjoern C.","family":"Schaeffner","sequence":"additional","affiliation":[{"name":"St. George\u2019s University"},{"name":"University of Iceland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2026,5,29]]},"reference":[{"key":"S0022149X26101527_r29","doi-asserted-by":"publisher","DOI":"10.1007\/s11230-020-09946-0"},{"key":"S0022149X26101527_r31","doi-asserted-by":"publisher","DOI":"10.2305\/IUCN.UK.2020-3.RLTS.T44216A124430838.en"},{"key":"S0022149X26101527_r48","unstructured":"WoRMS (2025) Calicotyle Diesing, 1850. 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