{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,20]],"date-time":"2026-01-20T04:20:11Z","timestamp":1768882811259,"version":"3.49.0"},"reference-count":0,"publisher":"Cambridge University Press (CUP)","issue":"7","license":[{"start":{"date-parts":[[2025,7,3]],"date-time":"2025-07-03T00:00:00Z","timestamp":1751500800000},"content-version":"unspecified","delay-in-days":32,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["cambridge.org"],"crossmark-restriction":true},"short-container-title":["Parasitology"],"published-print":{"date-parts":[[2025,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Distinguishing between <jats:italic>Stomylotrema bijugum<\/jats:italic> and <jats:italic>S. vicarium<\/jats:italic> is challenging due to their phenotypic plasticity. In this study, adult specimens were recovered from 9 host species in the Mexican tropical lowlands. To explore the morphological differences, 32 morphological characteristics were evaluated in 54 specimens. Linear discriminant analysis provided enough evidence to differentiate the 2 species. Additionally, a principal component analysis (PCA) was performed for each species. The PCA of <jats:italic>S. bijugum<\/jats:italic> revealed 3 groups separately corresponding to specimens from the 3 hosts, suggesting host-induced phenotypic plasticity, whereas the PCA of <jats:italic>S. vicarium<\/jats:italic> revealed that the specimens from 3 host species were clustered together, indicating morphometric homogeneity. To confirm the morphological differences between the 2 species of <jats:italic>Stomylotrema<\/jats:italic>, we sequenced 2 molecular markers: the D1\u2013D3 domains of the large subunit (LSU) from nuclear DNA and nicotinamide adenine dinucleotide dehydrogenase subunit 1 (<jats:italic>Nad1<\/jats:italic>) from mitochondrial DNA. Sequences of the LSU were aligned and compared with the LSU sequences of other congeneric species available in GenBank. Phylogenetic analyses supported the monophyly of <jats:italic>Stomylotrema<\/jats:italic>, with 2 main subclades that corresponded to <jats:italic>S. bijugum<\/jats:italic> and <jats:italic>S. vicarium<\/jats:italic>. A haplotype network was predicted with 25 <jats:italic>Nad1<\/jats:italic> sequences, revealing the presence of 2 clusters representing the 2 species separated from each other by 98 substitutions. The current studies on <jats:italic>S. bijugum<\/jats:italic> and <jats:italic>S. vicarium<\/jats:italic> revealed new hosts and geographical regions in the Americas, suggesting that both species addressed in the current study can complete their life cycle in the Neotropical region of Mexico.<\/jats:p>","DOI":"10.1017\/s0031182025100413","type":"journal-article","created":{"date-parts":[[2025,7,3]],"date-time":"2025-07-03T05:06:46Z","timestamp":1751519206000},"page":"641-656","update-policy":"https:\/\/doi.org\/10.1017\/policypage","source":"Crossref","is-referenced-by-count":1,"title":["Diversity of <i>Stomylotrema<\/i> spp. in the Mexican tropical lowlands: the case of <i>Stomylotrema bijugum<\/i> and <i>Stomylotrema vicarium<\/i> (Digenea: Stomylotrematidae), parasites of aquatic and passerine birds"],"prefix":"10.1017","volume":"152","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4871-0901","authenticated-orcid":false,"given":"Marcelo Tonatiuh","family":"Gonz\u00e1lez-Garc\u00eda","sequence":"first","affiliation":[{"name":"Universidad Nacional Aut\u00f3noma de M\u00e9xico"},{"name":"Universidad Nacional Aut\u00f3noma de M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Valerie","family":"P\u00e9rez-Mancilla","sequence":"additional","affiliation":[{"name":"Universidad Nacional Aut\u00f3noma de M\u00e9xico"},{"name":"Universidad Nacional Aut\u00f3noma de M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C\u00e9sar A.","family":"R\u00edos-Mu\u00f1oz","sequence":"additional","affiliation":[{"name":"Universidad Nacional Aut\u00f3noma de M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ana Lucia","family":"Sereno-Uribe","sequence":"additional","affiliation":[{"name":"Universidad Nacional Aut\u00f3noma de M\u00e9xico"},{"name":"Universidad Nacional Aut\u00f3noma de M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7050-8825","authenticated-orcid":false,"given":"Mart\u00edn","family":"Garc\u00eda-Varela","sequence":"additional","affiliation":[{"name":"Universidad Nacional Aut\u00f3noma de M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0499-6768","authenticated-orcid":false,"given":"Mirza P.","family":"Ortega-Olivares","sequence":"additional","affiliation":[{"name":"Universidad Nacional Aut\u00f3noma de M\u00e9xico"},{"name":"Universidad Nacional Aut\u00f3noma de M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2025,7,3]]},"container-title":["Parasitology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0031182025100413","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,9,4]],"date-time":"2025-09-04T12:20:52Z","timestamp":1756988452000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0031182025100413\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,6]]},"references-count":0,"journal-issue":{"issue":"7","published-print":{"date-parts":[[2025,6]]}},"alternative-id":["S0031182025100413"],"URL":"https:\/\/doi.org\/10.1017\/s0031182025100413","relation":{},"ISSN":["0031-1820","1469-8161"],"issn-type":[{"value":"0031-1820","type":"print"},{"value":"1469-8161","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,6]]},"assertion":[{"value":"\u00a9 The Author(s), 2025. Published by Cambridge University Press.","name":"copyright","label":"Copyright","group":{"name":"copyright_and_licensing","label":"Copyright and Licensing"}},{"value":"This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http:\/\/creativecommons.org\/licenses\/by\/4.0), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.","name":"license","label":"License","group":{"name":"copyright_and_licensing","label":"Copyright and Licensing"}},{"value":"This content has been made available to all.","name":"free","label":"Free to read"}]}}