{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T18:44:30Z","timestamp":1785437070185,"version":"3.56.0"},"reference-count":32,"publisher":"Cambridge University Press (CUP)","license":[{"start":{"date-parts":[[2026,7,28]],"date-time":"2026-07-28T00:00:00Z","timestamp":1785196800000},"content-version":"unspecified","delay-in-days":208,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"DOI":"10.13039\/100012046","name":"Vietnam Academy of Science and Technology","doi-asserted-by":"publisher","award":["VAST04.06\/25-26"],"award-info":[{"award-number":["VAST04.06\/25-26"]}],"id":[{"id":"10.13039\/100012046","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Helminthol."],"published-print":{"date-parts":[[2026]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    A new spiral nematode species,\n                    <jats:italic>Helicotylenchus laichauensis<\/jats:italic>\n                    sp. n., is described from the rhizosphere of\n                    <jats:italic>Panax vietnamensis<\/jats:italic>\n                    var\n                    <jats:italic>. fuscidiscus<\/jats:italic>\n                    in northern Vietnam. The new species is characterised by a hemispherical lip region with 4\u20135 annuli, a lateral field with four incisures whose inner lines fuse distally into a distinct m-shaped pattern on the tail, and a well-developed stylet 24.5\u201326.7 \u03bcm long, with knobs flattened to slightly indented anteriorly and a conus forming 50.1\u201353.5% of the total stylet length. The spermatheca is round and filled with sperm, and males are common. The tail is conical, dorsally convex, tapering to a prominent ventral projection bearing a variable mucro; phasmids are located 3\u20137 annuli anterior to the anus. Based particularly on similarities in the lip region structure, stylet morphology, lateral field pattern, phasmid position, and tail configuration, the\n                    <jats:italic>H. laichauensis<\/jats:italic>\n                    sp. n. is close to the known species namely\n                    <jats:italic>H. microcephalus, H. craigi, H. oleae<\/jats:italic>\n                    , and\n                    <jats:italic>H. amplius.<\/jats:italic>\n                    Phylogenetic analyses based on the D2\u2013D3 expansion segments of 28S, partial 18S, and ITS rRNA sequences revealed that the newly generated sequences of the new species form a maximally supported clade with corresponding sequences of\n                    <jats:italic>Helicotylenchus microcephalus<\/jats:italic>\n                    in all constructed trees.\n                  <\/jats:p>","DOI":"10.1017\/s0022149x26101928","type":"journal-article","created":{"date-parts":[[2026,7,28]],"date-time":"2026-07-28T09:41:41Z","timestamp":1785231701000},"source":"Crossref","is-referenced-by-count":0,"title":["Morphological and molecular characterisations of\n                    <i>Helicotylenchus laichauensis<\/i>\n                    sp. n. associated with Lai Chau ginseng (\n                    <i>Panax vietnamensis<\/i>\n                    var.\n                    <i>fuscidiscus<\/i>\n                    ) from Vietnam"],"prefix":"10.1017","volume":"100","author":[{"given":"T.D.","family":"Nguyen","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02wsd5p50","id-type":"ROR","asserted-by":"publisher"}],"name":"Vietnam Academy of Science and Technology"},{"id":[{"id":"https:\/\/ror.org\/02wsd5p50","id-type":"ROR","asserted-by":"publisher"}],"name":"Vietnam Academy of Science and Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4629-2590","authenticated-orcid":false,"given":"T.M.L.","family":"Le","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02wsd5p50","id-type":"ROR","asserted-by":"publisher"}],"name":"Vietnam Academy of Science and Technology"},{"id":[{"id":"https:\/\/ror.org\/02wsd5p50","id-type":"ROR","asserted-by":"publisher"}],"name":"Vietnam Academy of Science and Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4998-260X","authenticated-orcid":false,"given":"K.L.","family":"Phan","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02wsd5p50","id-type":"ROR","asserted-by":"publisher"}],"name":"Vietnam Academy of Science and Technology"},{"id":[{"id":"https:\/\/ror.org\/02wsd5p50","id-type":"ROR","asserted-by":"publisher"}],"name":"Vietnam Academy of Science and Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9645-8291","authenticated-orcid":false,"given":"P.Q.","family":"Trinh","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02wsd5p50","id-type":"ROR","asserted-by":"publisher"}],"name":"Vietnam Academy of Science and Technology"},{"id":[{"id":"https:\/\/ror.org\/02wsd5p50","id-type":"ROR","asserted-by":"publisher"}],"name":"Vietnam Academy of Science and Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2026,7,28]]},"reference":[{"key":"S0022149X26101928_r6","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-8286.2005.01009.x"},{"key":"S0022149X26101928_r29","doi-asserted-by":"publisher","DOI":"10.1163\/156854106778493420"},{"key":"S0022149X26101928_r21","doi-asserted-by":"publisher","DOI":"10.1163\/187529283X00159"},{"key":"S0022149X26101928_r31","doi-asserted-by":"publisher","DOI":"10.1163\/15685411-00002850"},{"key":"S0022149X26101928_r11","doi-asserted-by":"publisher","DOI":"10.1093\/molbev\/msae263"},{"key":"S0022149X26101928_r19","doi-asserted-by":"publisher","DOI":"10.1094\/PDIS-03-24-0554-PDN"},{"key":"S0022149X26101928_r20","unstructured":"O\u2019Bannon, JH and Inserra, RN (1989) Helicotylenchus species as crop-damaging parasitic nematodes. 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