{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,1]],"date-time":"2025-10-01T15:35:02Z","timestamp":1759332902192,"version":"build-2065373602"},"reference-count":76,"publisher":"Springer Science and Business Media LLC","issue":"5","license":[{"start":{"date-parts":[[2025,9,11]],"date-time":"2025-09-11T00:00:00Z","timestamp":1757548800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2025,9,11]],"date-time":"2025-09-11T00:00:00Z","timestamp":1757548800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"name":"Southeastern Cooperative Fish Parasite and Disease Project"},{"DOI":"10.13039\/100000202","name":"Fish and Wildlife Service","doi-asserted-by":"crossref","id":[{"id":"10.13039\/100000202","id-type":"DOI","asserted-by":"crossref"}]},{"name":"National Sea Grant"},{"DOI":"10.13039\/100000199","name":"U.S. Department of Agriculture","doi-asserted-by":"crossref","id":[{"id":"10.13039\/100000199","id-type":"DOI","asserted-by":"crossref"}]},{"name":"Federal Aid in Sport Fish Restoration"},{"DOI":"10.13039\/100008745","name":"Alabama Agricultural Experiment Station","doi-asserted-by":"crossref","id":[{"id":"10.13039\/100008745","id-type":"DOI","asserted-by":"crossref"}]},{"name":"Instituto Amaz\u00f3nico de Investigaciones Cient\u00edficas SINCHI"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Syst Parasitol"],"published-print":{"date-parts":[[2025,10]]},"abstract":"<jats:title>Abstract<\/jats:title>\n          <jats:p>We describe <jats:italic>Catadiscus marielaosornae<\/jats:italic> Cajiao-Mora and Bullard <jats:bold>n. sp<\/jats:bold>. (Diplodiscidae) from the intestine of Peters\u2019 thin-toed frog, <jats:italic>Leptodactylus petersii<\/jats:italic> (Steindachner) (Anura: Leptodactylidae) from the Yahuarcaca Lake System, Colombia. We assigned our specimens to <jats:italic>Catadiscus<\/jats:italic> Cohn, 1904 because they have a smooth-surfaced, pyriform body, centrally-constricted ventro-terminal acetabulum that lacks an accessory sucker, pharynx with extramural sacs, oesophageal bulb, and single testis. The new species differs from all but <jats:italic>Catadiscus rodriguezi<\/jats:italic> Caballero, 1955, <jats:italic>Catadiscus marinholutzi<\/jats:italic> Freitas and Lent, 1939, and <jats:italic>Catadiscus propinquus<\/jats:italic> Freitas and Dobbin, 1956 by having a vitellarium that is confluent anteriorly (<jats:italic>vs<\/jats:italic>. two non-confluent fields). It differs from the aforenamed congeners by having a ventral common genital pore that opens anterodextral to the oesophageal bifurcation, round vitelline follicles that become confluent anterior to the testis, and a 1: 2\u20133 ratio of acetabulum: testis width. Our 28S phylogenetic analysis recovered the new species sister to <jats:italic>C. marinholutzi<\/jats:italic>, and Diplodiscidae as paraphyletic, with <jats:italic>Catadiscus<\/jats:italic> sister to a clade comprising a sequence ascribed to <jats:italic>Chiorchis fabaceus<\/jats:italic> (Diesing, 1838) Fischoeder, 1901 (Cladorchiidae), and sequences of three species of <jats:italic>Diplodiscus<\/jats:italic> Diesing, 1836. The species description herein includes several features pertaining to the acetabulum, female genitalia, and excretory system that could comprise useful character states with which to more readily classify and diagnose diplodiscid species and genera. To our knowledge, this is the first record of a digenean infecting Peters\u2019 thin-toed frog, and it is also the first record of any parasite infecting any ditch frog (<jats:italic>Leptodactylus<\/jats:italic> spp.) from Colombia.<\/jats:p>","DOI":"10.1007\/s11230-025-10250-y","type":"journal-article","created":{"date-parts":[[2025,9,11]],"date-time":"2025-09-11T09:17:27Z","timestamp":1757582247000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Catadiscus marielaosornae n. sp. (Digenea: Diplodiscidae) infecting the intestine of Peters\u2019 thin-toed frog, Leptodactylus petersii (Steindachner) (Anura: Leptodactylidae) from the Yahuarcaca Lake System, Amazon River (Leticia, Colombia), with phylogenetic analysis"],"prefix":"10.1007","volume":"102","author":[{"given":"Kamila","family":"Cajiao-Mora","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jos\u00e9 Ranc\u00e9s","family":"Caicedo-Portilla","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"John H.","family":"Brule","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Haley R.","family":"Dutton","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stephen A.","family":"Bullard","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2025,9,11]]},"reference":[{"key":"10250_CR1","unstructured":"Acosta-Galvis, A. 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