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Bras. Parasitol. Vet."],"abstract":"<jats:p>Abstract Parasite-host interactions are shaped by environmental and biological factors, leading to diverse host impacts ranging from tissue damage to physiological impairments. The Tocantins-Araguaia basin, particularly the Upper Rio Tocantins region, harbors remarkable fish diversity and endemism, making it a critical area for parasitological research. Here, we report the first record of parasitism by isopods of the genus Paracymothoa in Moenkhausia species (M. aurantia and M. goya) from the Upper Rio Tocantins basin. The parasites (Paracymothoa astyanaxi) were located in the buccal cavity and frequently associated with visible lesions, including tongue amputation, a known outcome of their trophic behavior. This finding contributes to the understanding of parasitic diversity associated with Moenkhausia and underscores the relevance of parasitological surveys in Neotropical freshwater systems. It also provides insights into local ecological pressures and supports the development of conservation strategies for endemic ichthyofauna in biodiversity-rich and ecologically sensitive areas.<\/jats:p>","DOI":"10.1590\/s1984-29612025063","type":"journal-article","created":{"date-parts":[[2025,11,3]],"date-time":"2025-11-03T15:08:28Z","timestamp":1762182508000},"source":"Crossref","is-referenced-by-count":0,"title":["Hooked by the tongue: buccal parasitism of Moenkhausia spp. (Ostariophysi: Acestrorhamphidae) by Paracymothoa astyanaxi (Isopoda: Cymothoidae)"],"prefix":"10.1590","volume":"34","author":[{"given":"Artur","family":"Firmino","sequence":"first","affiliation":[{"name":"Universidade de Bras\u00edlia,  Brasil; Universidade de Bras\u00edlia,  Brasil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andr\u00e9","family":"Vital","sequence":"additional","affiliation":[{"name":"Universidade de Bras\u00edlia,  Brasil; Universidade de Bras\u00edlia,  Brasil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rayssa","family":"Nayara","sequence":"additional","affiliation":[{"name":"Universidade de Bras\u00edlia,  Brasil; Universidade de Bras\u00edlia,  Brasil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4754-5871","authenticated-orcid":false,"given":"Veronica","family":"Slobodian","sequence":"additional","affiliation":[{"name":"Universidade de Bras\u00edlia,  Brasil; Universidade de Bras\u00edlia,  Brasil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"530","published-online":{"date-parts":[[2025]]},"reference":[{"key":"ref1","first-page":"997","article-title":"Aspectos da hist\u00f3ria natural de Astyanax scabripinnis Jenyns (Teleostei, Characidae) em um riacho de floresta com arauc\u00e1ria no sul do Brasil","volume":"24","author":"Abilhoa V","year":"2007","journal-title":"Zoologia"},{"issue":"1","key":"ref2","doi-asserted-by":"crossref","first-page":"165","DOI":"10.11646\/zootaxa.3148.1.33","article-title":"Subphylum Crustacea Br\u00fcnnich, 1772. 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Animal biodiversity: An outline of higher-level classification and survey of taxonomic richness","volume":"3148","author":"Ahyong ST","year":"2011","journal-title":"Zootaxa"},{"issue":"3","key":"ref3","doi-asserted-by":"crossref","first-page":"501","DOI":"10.1007\/s10641-018-0719-1","article-title":"Schistocephalus solidus parasite prevalence and biomass intensity in threespine stickleback vary by habitat and diet in boreal lakes","volume":"101","author":"Arostegui MC","year":"2018","journal-title":"Environ Biol Fishes"},{"issue":"2","key":"ref4","doi-asserted-by":"crossref","DOI":"10.1590\/1676-0611-bn-2022-1388","article-title":"Diet of Moenkhausia bonita (Benine, Castro & Sabino 2004) (Characiformes: Characidae) in streams in the basin of rio Formoso, Brazilian Midwest","volume":"23","author":"Caldatto AM","year":"2023","journal-title":"Biota Neotrop"},{"issue":"2","key":"ref5","doi-asserted-by":"crossref","DOI":"10.1590\/1676-0611-bn-2021-1296","article-title":"Building knowledge to save species: 20 years of ichthyological studies in the Tocantins-Araguaia River basin","volume":"22","author":"Chamon CC","year":"2022","journal-title":"Biota Neotrop"},{"issue":"431","key":"ref6","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1206\/0003-0090.431.1.1","article-title":"The fishes of the Amazon: distribution and biogeographical patterns, with a comprehensive list of species","volume":"2019","author":"Dagosta FCP","year":"2019","journal-title":"Bull Am Mus Nat Hist"},{"issue":"5","key":"ref7","first-page":"1","article-title":"The american Characidae","volume":"43","author":"Eigenmann CH","year":"1917","journal-title":"Mem Mus Comp Zool\u0308ogy Harv Coll"},{"key":"ref8","series-title":"M\u00e9todos de estudo e t\u00e9cnicas laboratoriais em parasitologia de peixes.","author":"Eiras JC","year":"2000"},{"issue":"3","key":"ref9","doi-asserted-by":"crossref","first-page":"895","DOI":"10.1007\/s10452-024-10112-7","article-title":"Changes in parasite communities of 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bitterling Rhodeus sericeus (Cypriniformes: Cyprinidae)","volume":"12","author":"Yamano H","year":"2011","journal-title":"Limnology"}],"container-title":["Revista Brasileira de Parasitologia Veterin\u00e1ria"],"original-title":["Fisgado pela l\u00edngua: parasitismo bucal de Moenkhausia spp. (Ostariophysi: Acestrorhamphidae) por Paracymothoa astyanaxi (Isopoda: Cymothoidae)"],"link":[{"URL":"http:\/\/www.scielo.br\/scielo.php?script=sci_pdf&pid=S1984-29612025000400802&tlng=en","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,11,3]],"date-time":"2025-11-03T15:08:33Z","timestamp":1762182513000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.scielo.br\/scielo.php?script=sci_arttext&pid=S1984-29612025000400802&tlng=en"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025]]},"references-count":25,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2025]]}},"alternative-id":["S1984-29612025000400802"],"URL":"https:\/\/doi.org\/10.1590\/s1984-29612025063","relation":{},"ISSN":["1984-2961","0103-846X"],"issn-type":[{"value":"1984-2961","type":"electronic"},{"value":"0103-846X","type":"print"}],"subject":[],"published":{"date-parts":[[2025]]},"article-number":"e007525"}}