{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T20:54:20Z","timestamp":1792788860402,"version":"4.5.0"},"reference-count":53,"publisher":"FapUNIFESP (SciELO)","issue":"3","license":[{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"am","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"CNPq","award":["301911\/2022-3"],"award-info":[{"award-number":["301911\/2022-3"]}],"id":[{"id":"https:\/\/ror.org\/03swz6y49","id-type":"ROR","asserted-by":"crossref"}]},{"name":"CNPq","award":["307485\/2023-4"],"award-info":[{"award-number":["307485\/2023-4"]}],"id":[{"id":"https:\/\/ror.org\/03swz6y49","id-type":"ROR","asserted-by":"crossref"}]},{"name":"CNPq","award":["2018\/24980-8"],"award-info":[{"award-number":["2018\/24980-8"]}],"id":[{"id":"https:\/\/ror.org\/03swz6y49","id-type":"ROR","asserted-by":"crossref"}]},{"name":"CNPq","award":["88887.923713\/2023-00"],"award-info":[{"award-number":["88887.923713\/2023-00"]}],"id":[{"id":"https:\/\/ror.org\/03swz6y49","id-type":"ROR","asserted-by":"crossref"}]},{"name":"FAPESP","award":["301911\/2022-3"],"award-info":[{"award-number":["301911\/2022-3"]}],"id":[{"id":"https:\/\/ror.org\/02ddkpn78","id-type":"ROR","asserted-by":"crossref"}]},{"name":"FAPESP","award":["307485\/2023-4"],"award-info":[{"award-number":["307485\/2023-4"]}],"id":[{"id":"https:\/\/ror.org\/02ddkpn78","id-type":"ROR","asserted-by":"crossref"}]},{"name":"FAPESP","award":["2018\/24980-8"],"award-info":[{"award-number":["2018\/24980-8"]}],"id":[{"id":"https:\/\/ror.org\/02ddkpn78","id-type":"ROR","asserted-by":"crossref"}]},{"name":"FAPESP","award":["88887.923713\/2023-00"],"award-info":[{"award-number":["88887.923713\/2023-00"]}],"id":[{"id":"https:\/\/ror.org\/02ddkpn78","id-type":"ROR","asserted-by":"crossref"}]},{"name":"CAPES","award":["301911\/2022-3"],"award-info":[{"award-number":["301911\/2022-3"]}]},{"name":"CAPES","award":["307485\/2023-4"],"award-info":[{"award-number":["307485\/2023-4"]}]},{"name":"CAPES","award":["2018\/24980-8"],"award-info":[{"award-number":["2018\/24980-8"]}]},{"name":"CAPES","award":["88887.923713\/2023-00"],"award-info":[{"award-number":["88887.923713\/2023-00"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Rev. Bras. Parasitol. Vet."],"abstract":"<jats:p>Abstract Therodamas comprises copepods that parasitize marine, brackish-water and freshwater fishes, and currently includes eight valid species. In this study, a new species for this genus was described from the gills of Trachelyopterus galeatus collected in the Jari River, eastern Amazon, Brazil. Parasites were analyzed using light microscopy, scanning electron microscopy and SSU-rDNA sequences. A total of 539 parasites has recovered, with prevalence of 69%, mean intensity of 18 parasites per host and mean abundance of 12 (standard deviation = 12.8). The new species, Therodamas anujauensis n. sp., is characterized by the absence of cephalic lobes, an elongated neck and a distinctive combination of setae and spines on the swimming legs. Phylogenetic analyses confirmed its placement within Ergasilidae and revealed a close relationship with Therodamas longicollum. Molecular dating suggested that the Therodamas lineage originated approximately 59.6 million years ago, whereas the divergence between T. anujauensis n. sp. and T. longicollum occurred about 6.03 million years ago. This study increases the number of known species of Therodamas from eight to nine and expands knowledge of parasite diversity in the Amazon region.<\/jats:p>","DOI":"10.1590\/s1984-29612026044","type":"journal-article","created":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T10:47:24Z","timestamp":1790938044000},"source":"Crossref","is-referenced-by-count":0,"title":["Description of a new species of Therodamas (Crustacea: Ergasilidae) from the gills of Trachelyopterus galeatus (Auchenipteridae) from the Brazilian Amazon"],"prefix":"10.1590","volume":"35","author":[{"given":"David Sales Sousa","family":"Valentim","sequence":"first","affiliation":[{"name":"Universidade do Estado do Amap\u00e1","place":["Macap\u00e1, AP, Brasil"]},{"name":"Universidade Federal do Amap\u00e1","place":["Macap\u00e1, AP, Brasil"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leonardo Oliveira","family":"Mota-J\u00fanior","sequence":"additional","affiliation":[{"name":"Universidade Federal do Amap\u00e1","place":["Macap\u00e1, AP, Brasil"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Edson Aparecido","family":"Adriano","sequence":"additional","affiliation":[{"name":"Universidade Federal de S\u00e3o Paulo","place":["Diadema, SP, Brasil"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcos","family":"Tavares-Dias","sequence":"additional","affiliation":[{"name":"Universidade Federal do Amap\u00e1","place":["Macap\u00e1, AP, Brasil"]},{"name":"Empresa Brasileira de Pesquisa Agropecu\u00e1ria","place":["Macap\u00e1, AP, Brasil"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcos Sidney Brito","family":"Oliveira","sequence":"additional","affiliation":[{"name":"Universidade do Estado do Amap\u00e1","place":["Macap\u00e1, AP, Brasil"]},{"name":"Universidade Federal do Amap\u00e1","place":["Macap\u00e1, AP, Brasil"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"530","published-online":{"date-parts":[[2026]]},"reference":[{"issue":"1","key":"ref1","first-page":"70","article-title":"Conserva\u00e7\u00e3o da biodiversidade em \u00e1guas continentais do Brasil","volume":"1","author":"Agostinho AA","year":"2005","journal-title":"Megadiversidade"},{"key":"ref2","series-title":"Historical biogeography of neotropical freshwater fishes.","author":"Albert JS","year":"2011"},{"issue":"17","key":"ref3","doi-asserted-by":"crossref","first-page":"3389","DOI":"10.1093\/nar\/25.17.3389","article-title":"Gapped BLAST and PSI-BLAST: a new generation of protein database search programs","volume":"25","author":"Altschul SF","year":"1997","journal-title":"Nucleic Acids Res"},{"issue":"4","key":"ref4","doi-asserted-by":"crossref","DOI":"10.1371\/journal.pcbi.1003537","article-title":"BEAST 2: a software platform for Bayesian evolutionary analysis","volume":"10","author":"Bouckaert R","year":"2014","journal-title":"PLOS Comput Biol"},{"key":"ref5","series-title":"An introduction to copepod diversity.","author":"Boxshall GA","year":"2004"},{"issue":"6","key":"ref6","doi-asserted-by":"crossref","first-page":"489","DOI":"10.1002\/jemt.1070260603","article-title":"Comparison of hexamethyldisilazane (HMDS), Peldri II, and critical\u2010point drying methods for scanning electron microscopy of biological specimens","volume":"26","author":"Bray DF","year":"1993","journal-title":"Microsc Res Tech"},{"issue":"4","key":"ref7","doi-asserted-by":"crossref","first-page":"575","DOI":"10.2307\/3284227","article-title":"Parasitology meets ecology on its own terms: Margolis et al. revisited","volume":"83","author":"Bush AO","year":"1997","journal-title":"J Parasitol"},{"issue":"2","key":"ref8","doi-asserted-by":"crossref","first-page":"133","DOI":"10.1007\/s11230-022-10076-y","article-title":"Two new species of Acusicola Cressey, 1970 (Copepoda: Cyclopoida: Ergasilidae) parasitic on the gills of two estuarine actinopterygians off Brazil","volume":"100","author":"Couto JV","year":"2023","journal-title":"Syst Parasitol"},{"issue":"2","key":"ref9","doi-asserted-by":"crossref","first-page":"150","DOI":"10.2307\/1485466","article-title":"Kabatarina pattersoni, a fossil parasitic copepod (Dichelesthiidae) from a Lower Cretaceous fish","volume":"35","author":"Cressey R","year":"1989","journal-title":"Micropaleontology"},{"issue":"20","key":"ref10","first-page":"265","article-title":"Therodamas dawsoni, a new species of parasitic copepod (Cyclopoida: Ergasilidae) from the west coast of Panama","volume":"85","author":"Cressey R","year":"1972","journal-title":"Proc Biol Soc Wash"},{"issue":"5","key":"ref11","doi-asserted-by":"crossref","DOI":"10.1371\/journal.pbio.0040088","article-title":"Relaxed phylogenetics and dating with confidence","volume":"4","author":"Drummond AJ","year":"2006","journal-title":"PLoS Biol"},{"issue":"1","key":"ref12","doi-asserted-by":"crossref","first-page":"113","DOI":"10.1186\/1471-2105-5-113","article-title":"MUSCLE: a multiple sequence alignment method with reduced time and space complexity","volume":"5","author":"Edgar RC","year":"2004","journal-title":"BMC Bioinformatics"},{"issue":"3","key":"ref13","doi-asserted-by":"crossref","first-page":"199","DOI":"10.1023\/A:1012209101065","article-title":"The mesoparasitic genera of the Ergasilidae (Copepoda): with descriptions of new species of Paeonodes Wilson and Therodamas Kr\u00f8yer","volume":"50","author":"El-Rashidy H","year":"2001","journal-title":"Syst Parasitol"},{"key":"ref14","series-title":"Check list of the freshwater fishes of South and Central America.","first-page":"470","volume-title":"Family Auchenipteridae.","author":"Ferraris-Jr CJ","year":"2003"},{"issue":"5","key":"ref15","doi-asserted-by":"crossref","first-page":"64","DOI":"10.1007\/s11230-024-10189-6","article-title":"A new species of Neoergasilus Yin 1956 (Copepoda: Cyclopoida: Ergasilidae) parasitic on the catfish Clarias gariepinus (Burchell, 1822) (Siluriformes: Clariidae) from South Africa","volume":"101","author":"Fikiye PP","year":"2024","journal-title":"Syst Parasitol"},{"key":"ref16","series-title":"FishBase version (06\/2026)","author":"Froese R","year":"2026"},{"issue":"4","key":"ref17","doi-asserted-by":"crossref","DOI":"10.1590\/s1984-29612023055","article-title":"Metazoan parasites of Hoplias aff. malabaricus, Trachelyopterus galeatus and Schizodon borellii (Osteichthyes) from the Protected Area and its main tributary, Brazil","volume":"32","author":"Hasuike WT","year":"2023","journal-title":"Rev Bras Parasitol Vet"},{"issue":"91","key":"ref18","doi-asserted-by":"crossref","DOI":"10.1098\/rsif.2013.0814","article-title":"Fish responses to flow velocity and turbulence in relation to size, sex and parasite load","volume":"11","author":"Hockley FA","year":"2014","journal-title":"J R Soc Interface"},{"issue":"6006","key":"ref19","doi-asserted-by":"crossref","first-page":"927","DOI":"10.1126\/science.1194585","article-title":"Amazonia through time: andean uplift, climate change, landscape evolution, and biodiversity","volume":"330","author":"Hoorn C","year":"2010","journal-title":"Science"},{"key":"ref20","first-page":"110","article-title":"The flood pulse concept in river-floodplain systems","volume":"106","author":"Junk WJ","year":"1989","journal-title":"Can Special Publ Fish Aquatic"},{"issue":"12","key":"ref21","doi-asserted-by":"crossref","first-page":"1647","DOI":"10.1093\/bioinformatics\/bts199","article-title":"Geneious Basic: an integrated and extendable desktop software platform for the organization and analysis of sequence data","volume":"28","author":"Kearse M","year":"2012","journal-title":"Bioinformatics"},{"issue":"1","key":"ref22","first-page":"1","article-title":"Diversidade de peixes em lagos manejados em \u00e1rea de v\u00e1rzea Amaz\u00f4nica brasileira","volume":"7","author":"Leal WMM","year":"2018","journal-title":"Sci Amazon"},{"key":"ref23","doi-asserted-by":"crossref","first-page":"71","DOI":"10.3897\/natureconservation.36.35045","article-title":"Phylogeographic patterns and demographic history of Pomacea canaliculata and Pomacea maculata from different countries (Ampullariidae, Gastropoda, Mollusca)","volume":"36","author":"Liu X","year":"2019","journal-title":"Nat Conserv"},{"key":"ref24","series-title":"Amazonia: landscape and species evolution: a look into the past.","first-page":"38","volume-title":"Tectonic history of the Andes and Sub-Andean zones: implications for the development of the Amazon drainage basin.","author":"Mora A","year":"2010"},{"issue":"2","key":"ref25","doi-asserted-by":"crossref","first-page":"281","DOI":"10.24039\/rnh2016102749","article-title":"Copepods (Crustacea: Ergasilidae) fish parasites of floodplain lakes of Central Amazon, Brazil","volume":"109","author":"Morey GAM","year":"2016","journal-title":"Neotrop Helminthol"},{"issue":"2","key":"ref26","article-title":"Isonebula clavuslongus n. sp. (Isopoda: Cymothoidae) parasitizing Myloplus ternetzi (Norman, 1929), a fish of the family Serrasalmidae, in the Brazilian Amazon region","volume":"97","author":"Oliveira MSB","year":"2025","journal-title":"An Acad Bras Cienc"},{"issue":"9","key":"ref27","doi-asserted-by":"crossref","first-page":"3137","DOI":"10.1007\/s00436-021-07256-y","article-title":"Integrative taxonomy of a new species of Therodamas (Ergasilidae) infecting the Amazonian freshwater fish Leporinus fasciatus (Anostomidae)","volume":"120","author":"Oliveira MSB","year":"2021","journal-title":"Parasitol Res"},{"issue":"8","key":"ref28","doi-asserted-by":"crossref","first-page":"2295","DOI":"10.1007\/s00436-022-07569-6","article-title":"Morphological and functional structure of two Ergasilidae parasites determine their microhabitat affinity on the gills of an Anostomidae fish from the Amazon","volume":"121","author":"Oliveira MSB","year":"2022","journal-title":"Parasitol Res"},{"key":"ref29","first-page":"93","article-title":"Una nueva especie de Therodamas (Therodamasidae, Cyclopoida) cop\u00e9podo par\u00e1sito de peces de agua dulce de la Rep\u00fablica Argentina","volume":"35","author":"Paggi JC","year":"1976","journal-title":"Physis Buenos Aires"},{"issue":"1","key":"ref30","doi-asserted-by":"crossref","first-page":"46","DOI":"10.1590\/S1984-29612016016","article-title":"Are similar the parasite communities structure of Trachelyopterus coriaceus and Trachelyopterus galeatus (Siluriformes: Auchenipteridae) in the Amazon basin?","volume":"25","author":"Pantoja WMF","year":"2016","journal-title":"Rev Bras Parasitol Vet"},{"issue":"4","key":"ref31","doi-asserted-by":"crossref","first-page":"535","DOI":"10.1590\/S0101-81751990000400012","article-title":"Cangatiella arandasi, gen. n. sp. n. (Cestoda: Proteocephalidae), parasito de para Parauchenipterus galeatus (Siluriformes: Auchenipterldae) do Rio Paran\u00e1, PR","volume":"7","author":"Pavanelli GC","year":"1990","journal-title":"Rev Bras Zool"},{"issue":"7","key":"ref32","doi-asserted-by":"crossref","first-page":"1253","DOI":"10.1093\/molbev\/msn083","article-title":"jModelTest: phylogenetic model averaging","volume":"25","author":"Posada D","year":"2008","journal-title":"Mol Biol Evol"},{"issue":"3","key":"ref33","doi-asserted-by":"crossref","first-page":"277","DOI":"10.1086\/393500","article-title":"The diversity of parasites","volume":"75","author":"Poulin R","year":"2000","journal-title":"Q Rev Biol"},{"key":"ref34","series-title":"Peixes do Rio Madeira.","volume":"3","author":"Queiroz LJ","year":"2013"},{"issue":"5","key":"ref35","doi-asserted-by":"crossref","first-page":"901","DOI":"10.1093\/sysbio\/syy032","article-title":"Posterior summarization in Bayesian phylogenetics using tracer 1.7","volume":"67","author":"Rambaut A","year":"2018","journal-title":"Syst Biol"},{"key":"ref36","series-title":"Molecular evolution, phylogenetics and epidemiology: FigTree","author":"Rambaut A","year":"2024"},{"key":"ref37","series-title":"Check list of the freshwater fishes of South and Central America.","author":"Reis RE","year":"2003"},{"issue":"12","key":"ref38","doi-asserted-by":"crossref","first-page":"1572","DOI":"10.1093\/bioinformatics\/btg180","article-title":"MrBayes 3: bayesian phylogenetic inference under mixed models","volume":"19","author":"Ronquist F","year":"2003","journal-title":"Bioinformatics"},{"issue":"8","key":"ref39","doi-asserted-by":"crossref","first-page":"559","DOI":"10.1016\/j.ijpara.2015.03.006","article-title":"Gone with the flow: current velocities mediate parasitic infestation of an aquatic host","volume":"45","author":"Samsing F","year":"2015","journal-title":"Int J Parasitol"},{"issue":"3","key":"ref40","doi-asserted-by":"crossref","first-page":"416","DOI":"10.1590\/s1984-29612019047","article-title":"New occurrence of Kudoa orbicularis parasitizing the freshwater catfish Trachelyopterus galeatus (Siluriformes: Auchenipteridae) in the Brazilian Amazon region","volume":"28","author":"Santos WJP","year":"2019","journal-title":"Rev Bras Parasitol Vet"},{"issue":"2","key":"ref41","doi-asserted-by":"crossref","first-page":"299","DOI":"10.1007\/s00436-007-0764-8","article-title":"Phylogeny of freshwater parasitic copepods in the Ergasilidae (Copepoda: Poecilostomatoida) based on 18S and 28S rDNA sequences","volume":"102","author":"Song Y","year":"2008","journal-title":"Parasitol Res"},{"issue":"2","key":"ref42","doi-asserted-by":"crossref","first-page":"41","DOI":"10.18561\/2179-5746\/biotaamazonia.v6n2p41-49","article-title":"Estrutura populacional e reprodu\u00e7\u00e3o do Anuj\u00e1, Trachelyopterus galeatus (Linnaeus, 1766), em uma \u00e1rea de uso sustent\u00e1vel da Zona Costeira Amaz","volume":"6","author":"Sousa DG","year":"2016","journal-title":"Biota Amaz\u00f4n"},{"issue":"4","key":"ref43","doi-asserted-by":"crossref","first-page":"339","DOI":"10.4257\/oeco.2025.2904.06","article-title":"Ecological aspects of metazoan parasites in Trachelyopterus galeatus (Siluriformes: Auchenipteridae) from the Pericum\u00e3 River, state of Maranh\u00e3o, northeast Brazil","volume":"29","author":"Souza RS","year":"2025","journal-title":"Oecol Aust"},{"issue":"9","key":"ref44","doi-asserted-by":"crossref","first-page":"1107","DOI":"10.1163\/156854008X360842","article-title":"A new species and host range of Therodamas (Copepoda, Ergasilidae) from the Eastern Tropical Pacific","volume":"81","author":"Su\u00e1rez-Morales E","year":"2008","journal-title":"Crustaceana"},{"issue":"2","key":"ref45","doi-asserted-by":"crossref","first-page":"89","DOI":"10.1007\/s11230-007-9109-3","article-title":"A new genus and species of mesoparasitic ergasilid (Copepoda: Cyclopoida) from brackish water pufferfishes collected in northern Australian waters","volume":"69","author":"Tang D","year":"2008","journal-title":"Syst Parasitol"},{"issue":"3","key":"ref46","doi-asserted-by":"crossref","first-page":"512","DOI":"10.1590\/S0101-81752008000300018","article-title":"Ergasilus chelangulatus sp. nov. (Copepoda: Ergasilidae) a branchial parasite of the freshwater catfish, Pimelodus maculatus from the upper S\u00e3o Francisco River, Brazil","volume":"25","author":"Thatcher VE","year":"2008","journal-title":"Rev Bras Zool"},{"key":"ref47","series-title":"Amazon fish parasites.","author":"Thatcher VE","year":"2006","edition":"2nd"},{"issue":"1-4","key":"ref48","doi-asserted-by":"crossref","first-page":"97","DOI":"10.1016\/S0924-7963(97)00043-2","article-title":"Copepods and fishes in the Brazilian Amazon","volume":"15","author":"Thatcher VE","year":"1998","journal-title":"J Mar Syst"},{"issue":"1","key":"ref49","first-page":"49","article-title":"The parasitic crustaceans of fishes from the Brazilian Amazon, 16. Amazonicopeus elongatus gen. et sp. nov. (Copepoda: Poecilostomatoida) with the proposal of Amazonicopeidae fam. nov. and remarks on its pathogenicity","volume":"10","author":"Thatcher VE","year":"1986","journal-title":"Amazoniana"},{"key":"ref50","first-page":"1","article-title":"Cop\u00e9podos par\u00e1sitos de los pesces marinos del Uruguay","volume":"54","author":"Thomsen R","year":"1949","journal-title":"Comun Zool Del Mus Hist\u00f3ria Nat Montevideo"},{"key":"ref51","series-title":"World of copepods database. Ergasilidae Burmeister, 1835","author":"Walter TC","year":"2026"},{"issue":"7","key":"ref52","doi-asserted-by":"crossref","first-page":"1720","DOI":"10.1093\/molbev\/mst064","article-title":"DAMBE5: a comprehensive software package for data analysis in molecular biology and evolution","volume":"30","author":"Xia X","year":"2013","journal-title":"Mol Biol Evol"},{"issue":"2","key":"ref53","doi-asserted-by":"crossref","first-page":"436","DOI":"10.1007\/s11686-020-00282-3","article-title":"Three New species of Cosmetocleithrum (Monogenea: Dactylogyridae) gill parasites of Trachelyopterus galeatus (Siluriformes: Auchenipteridae) in Southeastern Brazil","volume":"66","author":"Yamada POF","year":"2021","journal-title":"Acta Parasitol"}],"container-title":["Revista Brasileira de Parasitologia Veterin\u00e1ria"],"original-title":[],"link":[{"URL":"http:\/\/www.scielo.br\/scielo.php?script=sci_pdf&pid=S1984-29612026000300208&tlng=en","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T10:47:37Z","timestamp":1790938057000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.scielo.br\/scielo.php?script=sci_arttext&pid=S1984-29612026000300208&tlng=en"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026]]},"references-count":53,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2026]]}},"alternative-id":["S1984-29612026000300208"],"URL":"https:\/\/doi.org\/10.1590\/s1984-29612026044","relation":{},"ISSN":["1984-2961","0103-846X"],"issn-type":[{"value":"1984-2961","type":"electronic"},{"value":"0103-846X","type":"print"}],"subject":[],"published":{"date-parts":[[2026]]},"article-number":"e006226"}}