{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,14]],"date-time":"2026-05-14T21:55:28Z","timestamp":1778795728647,"version":"3.51.4"},"reference-count":41,"publisher":"EDP Sciences","license":[{"start":{"date-parts":[[2020,1,21]],"date-time":"2020-01-21T00:00:00Z","timestamp":1579564800000},"content-version":"vor","delay-in-days":20,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Parasite"],"accepted":{"date-parts":[[2020,1,6]]},"published-print":{"date-parts":[[2020]]},"abstract":"<jats:p>Two species of <jats:italic>Cosmetocleithrum<\/jats:italic> Kritsky, Thatcher &amp; Boeger, 1986 (both new) and two species of <jats:italic>Demidospermus<\/jats:italic> Suriano, 1983 (one new) are reported from the gills of the catfish <jats:italic>Auchenipterus nuchalis,<\/jats:italic> popularly known as \u201cmapar\u00e1\u201d, from the Tocantins River and tributaries, North Region of Brazil. <jats:italic>Cosmetocleithrum berecae<\/jats:italic> n. sp. differs from all other species presently known in the genus by the morphology of the anchors presenting an elongate shaft and short recurved point, a coiled male copulatory organ (MCO) with three rings, and an elongate slender accessory piece with a bifurcated distal end. <jats:italic>Cosmetocleithrum nunani<\/jats:italic> n. sp. differs from its congeners by the combination of the following features: (1) Ventral and dorsal anchors with moderately long curved shaft and short point; (2) Hooks with poorly developed thumb; (3) Hook pairs 5 and 6 similar to each other, but morphologically distinct from remaining hook pairs; and (4) MCO coiled, with approximately 1.5 rings. <jats:italic>Demidospermus tocantinensis<\/jats:italic> n. sp. is easily distinguished from other species of the genus by presenting an inverted-G-shaped MCO with a median knee-like expansion. <jats:italic>Demidospermus osteomystax<\/jats:italic> Tavernari, Takemoto, Lacerda &amp; Pavanelli, 2010 is redescribed based on paratypes and specimens from the gills of <jats:italic>A. nuchalis<\/jats:italic> from the Tocantins River, a new host and locality records for this species. The monotypic <jats:italic>Paracosmetocleithrum<\/jats:italic> Acosta, Scholz, Blasco-Costa, Alves &amp; Silva, 2017, the only other Neotropical genus reported in siluriforms besides <jats:italic>Cosmetocleithrum<\/jats:italic> with species presenting two ribbon-like projections on the posterior margin of the dorsal bar, is considered a junior subjective synonym of <jats:italic>Cosmetocleithrum<\/jats:italic>.<\/jats:p>","DOI":"10.1051\/parasite\/2020002","type":"journal-article","created":{"date-parts":[[2020,1,22]],"date-time":"2020-01-22T09:03:13Z","timestamp":1579683793000},"page":"4","source":"Crossref","is-referenced-by-count":18,"title":["Dactylogyridae (Monogenoidea, Polyonchoinea) from the gills of <i>Auchenipterus nuchalis<\/i> (Siluriformes, Auchenipteridae) from the Tocantins River, Brazil"],"prefix":"10.1051","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8204-336X","authenticated-orcid":false,"given":"Simone C.","family":"Cohen","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0684-3389","authenticated-orcid":false,"given":"Marcia C. 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