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Helminthol."],"published-print":{"date-parts":[[2025]]},"abstract":"<jats:title>Abstract<\/jats:title>\n\t  <jats:p>The synonymies of the echinochasmid genera <jats:italic>Mesorchis<\/jats:italic> Dietz, 1909 and <jats:italic>Monilifer<\/jats:italic> Dietz, 1909 with <jats:italic>Stephanoprora<\/jats:italic> Odhner, 1902 remain contentious and unresolved with morphology. To explore the matter, we herein provide a supplemental description of the type species of <jats:italic>Stephanoprora<\/jats:italic>, <jats:italic>Stephanoprora ornata<\/jats:italic> Odhner, 1902, based on specimens we collected from the intestine of a Nile crocodile <jats:italic>Crocodylus niloticus<\/jats:italic> Laurenti, 1768 (Crocodylia: Crocodylidae) captured in the Kavango River, Namibia. No nucleotide information was available previously for <jats:italic>S. ornata.<\/jats:italic> Morphology plus <jats:italic>28S<\/jats:italic> and <jats:italic>ITS2<\/jats:italic> phylogenetic analyses suggested <jats:italic>Stephanoprora<\/jats:italic> is a monotypic genus that can be differentiated from other genera by having 26 collar spines. <jats:italic>Stephanoprora<\/jats:italic> differs from <jats:italic>Mesorchis<\/jats:italic> by the number and distribution of collar spines (26 [2 dorsal spines, 12 lateral spines, 12 corner spines] vs. 22 [2 dorsal spines, 12 lateral spines, 8 corner spines] in <jats:italic>Mesorchis<\/jats:italic>), length of the pre-pharyngeal oesophagus, pharynx position posterior to collar (vs. pre-pharyngeal oesophagus short, pharynx anterior to or at level of corner spines), and testes shape (elongate-ovoid, irregular in outline vs. ovoid, atypically elongated). Our <jats:italic>28S<\/jats:italic> and <jats:italic>ITS2<\/jats:italic> phylogenies recovered the new sequence of <jats:italic>S. ornata<\/jats:italic> (having 26 collar spines) sister to all remaining echinochasmid sequences, representing species that have 20\u201324 collar spines. <jats:italic>Echinochasmus<\/jats:italic> Dietz, 1909 and <jats:italic>Mesorchis<\/jats:italic> were recovered as paraphyletic. We retain <jats:italic>Monilifer<\/jats:italic> as a junior subjective synonym of <jats:italic>Echinochasmus<\/jats:italic> based a suite of morphological features related to body shape and genitalia and because the designated type for <jats:italic>Monilifer<\/jats:italic> was reassigned to <jats:italic>Echinochasmus.<\/jats:italic> We accept 25 species of <jats:italic>Mesorchis.<\/jats:italic><\/jats:p>","DOI":"10.1017\/s0022149x25000100","type":"journal-article","created":{"date-parts":[[2025,2,10]],"date-time":"2025-02-10T04:40:56Z","timestamp":1739162456000},"source":"Crossref","is-referenced-by-count":4,"title":["Supplemental description of <i>Stephanoprora ornata<\/i> Odhner, 1902 (Digenea: Echinochasmidae) infecting the Nile crocodile, <i>Crocodylus niloticus<\/i> (Crocodylidae) from Namibia with emendation of <i>Mesorchis<\/i> Dietz, 1909 and a phylogenetic analysis"],"prefix":"10.1017","volume":"99","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-1513-6958","authenticated-orcid":false,"given":"K.","family":"Cajiao-Mora","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"H.R.","family":"Dutton","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"F.J.","family":"Jacobs","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P.C.","family":"Beytell","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"E.C.","family":"Netherlands","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"L.H.","family":"DuPreez","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S.A.","family":"Bullard","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2025,2,10]]},"reference":[{"key":"S0022149X25000100_r63","first-page":"187","article-title":"Informa\u00e7\u00f5es sobre a fauna helmintologica de Mato Grosso","volume":"3","author":"Travassos","year":"1922","journal-title":"Folha M\u00e9dica"},{"key":"S0022149X25000100_r12","article-title":"New genus and species of Liolopidae Odhner, 1912 (Platyhelminthes: Digenea) infecting Nile crocodile, Crocodylus niloticus (Laurenti, 1768) (Crocodilia: Crocodylidae) in the Kavango River, Namibia","author":"Dutton","year":"In press","journal-title":"Parasitology International"},{"key":"S0022149X25000100_r29","doi-asserted-by":"publisher","DOI":"10.1007\/s11230-016-9681-5"},{"key":"S0022149X25000100_r52","doi-asserted-by":"publisher","DOI":"10.1016\/j.crpv.2003.07.002"},{"key":"S0022149X25000100_r72","volume-title":"Synopsis of Digenetic Trematodes of Vertebrates","volume":"2","author":"Yamaguti","year":"1971"},{"key":"S0022149X25000100_r38","doi-asserted-by":"publisher","DOI":"10.1111\/j.1558-5646.2011.01373.x"},{"key":"S0022149X25000100_r65","doi-asserted-by":"publisher","DOI":"10.1645\/20-77"},{"key":"S0022149X25000100_r9","doi-asserted-by":"publisher","DOI":"10.1093\/sysbio\/syw037"},{"key":"S0022149X25000100_r42","first-page":"292","article-title":"Stephanoprora uruguayense Holcman-Spector et Olag\u00fce, 1989 (Digenea, Echinostomatidae) from Argentina, and comments on species of Stephanoprora from birds of the Neotropical Region","volume":"49","author":"Ostrowski de N\u00fa\u00f1ez","year":"2004","journal-title":"Acta Parasitologica"},{"key":"S0022149X25000100_r58","first-page":"336","article-title":"Fauna helmintol\u00f3gica de las aves del Lago Pellegrini. 1. 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