{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T13:01:25Z","timestamp":1785416485064,"version":"3.56.0"},"reference-count":29,"publisher":"Cambridge University Press (CUP)","license":[{"start":{"date-parts":[[2025,11,14]],"date-time":"2025-11-14T00:00:00Z","timestamp":1763078400000},"content-version":"unspecified","delay-in-days":317,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"DOI":"10.13039\/100000155","name":"Division of Environmental Biology","doi-asserted-by":"publisher","award":["DEB-1120734"],"award-info":[{"award-number":["DEB-1120734"]}],"id":[{"id":"10.13039\/100000155","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Helminthol."],"published-print":{"date-parts":[[2025]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    <jats:italic>Schwartzitrema<\/jats:italic>\n                    Vigueras, 1941, is a small, rarely reported genus of diplostomoideans that parasitize avian definitive hosts, predominantly anhingas, on several continents. No DNA sequences were previously available for any\n                    <jats:italic>Schwartzitrema<\/jats:italic>\n                    spp. In the present study, we describe adults of 2 new\n                    <jats:italic>Schwartzitrema<\/jats:italic>\n                    spp. from anhingas in Brazil. We also provide description of metacercaria of one of the new species from Argentina.\n                    <jats:italic>Schwartzitrema macrotesticulata<\/jats:italic>\n                    n. sp. lacks a clear separation between its testes, appearing almost as a contiguous, irregularly shaped, lobular mass. A highly characteristic feature of\n                    <jats:italic>Schwartzitrema macroholdfastus<\/jats:italic>\n                    n. sp. is a strongly enlarged lobe of the holdfast organ. These features, along with distribution of vitellarium and nature of the preputial folds surrounding the genital cones, separate the new species from their congeners. We generated partial sequences of the large ribosomal subunit (28S) rDNA and cytochrome c oxidase subunit I (\n                    <jats:italic>cox<\/jats:italic>\n                    1) mtDNA genes from adult forms of both species and\n                    <jats:italic>cox<\/jats:italic>\n                    1 of metacercarial stages. The 28S sequences were used for phylogenetic inference. The pairwise sequence divergence between the 2 species is 4.0\u20134.6% in\n                    <jats:italic>cox<\/jats:italic>\n                    1 gene. Intraspecific variability in the same\n                    <jats:italic>cox<\/jats:italic>\n                    1 region did not exceed 0.8% despite the long geographic distance between collecting sites in Brazil and Argentina.\n                  <\/jats:p>","DOI":"10.1017\/s0022149x25100837","type":"journal-article","created":{"date-parts":[[2025,11,14]],"date-time":"2025-11-14T08:18:46Z","timestamp":1763108326000},"source":"Crossref","is-referenced-by-count":0,"title":["The phylogenetic position of the unusual diplostomoidean genus\n                    <i>Schwartzitrema<\/i>\n                    Vigueras, 1941 (Digenea, Diplostomoidea) and description of 2 new species from Neotropics"],"prefix":"10.1017","volume":"99","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2472-4372","authenticated-orcid":false,"given":"T.J.","family":"Achatz","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/01cwqb692","id-type":"ROR","asserted-by":"publisher"}],"name":"Middle Georgia State University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"L.L.","family":"Ho","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/01cwqb692","id-type":"ROR","asserted-by":"publisher"}],"name":"Middle Georgia State University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7177-333X","authenticated-orcid":false,"given":"M.","family":"Montes","sequence":"additional","affiliation":[{"name":"Universidad Nacional de La Plata (CCT, CONICET-UNLP)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.","family":"Barneche","sequence":"additional","affiliation":[{"name":"Universidad Nacional de La Plata (CCT, CONICET-UNLP)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7319-0234","authenticated-orcid":false,"given":"A.","family":"Fecchio","sequence":"additional","affiliation":[{"name":"The Academy of Natural Sciences of Drexel University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5084-7566","authenticated-orcid":false,"given":"V.V.","family":"Tkach","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/04a5szx83","id-type":"ROR","asserted-by":"publisher"}],"name":"University of North Dakota"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2025,11,14]]},"reference":[{"key":"S0022149X25100837_r23","first-page":"222","article-title":"Occurrence of black-spot disease caused by metacercariae of Posthodiplostomum cuticola among juvenile fishes in water bodies in the Morava River basin","volume":"49","author":"Ondra\u010dkova","year":"2004","journal-title":"Acta Parasitologica"},{"key":"S0022149X25100837_r22","doi-asserted-by":"publisher","DOI":"10.1079\/9780851995472.0231"},{"key":"S0022149X25100837_r27","first-page":"1","article-title":"Infestations of the trematode Bolbophorus sp. in channel catfish","volume":"1801","author":"Terhune","year":"2003","journal-title":"Southern Regional Aquaculture Center"},{"key":"S0022149X25100837_r21","first-page":"127","volume-title":"The Role of Collections in Ornithology: The Extended Specimen. 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