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Previous issue date: 2014-02-28 === CAPES === CNPq === Specimens of Conorhynchos conirostris (Valenciennes, 1840), Duopalatinus emarginatus (Valenciennes, 1840), Pimelodus pohli Ribeiro & Lucena, 2006 and Cephalosilurus fowleri (Haseman, 1911) endemic fishes the river S?o Francisco, were collected from the upper S?o Francisco River, Minas Gerais, downstream from the Tr?s Marias Dam (18 ? 12'32'' S and 45 ? 15'41''W), from April 2008 to January , 2012. Twenty three species of parasites were found: Demidospermus uncusvalidus, Scleroductus sp., Pavanelliella pavanellii, metacercariae Austrodiplostomum compactum, Creptotrema creptorema, Crepidostomum platense, Iheringtrema iheringi, Karipharynx sp. Prosthenhystera obesa, metacestodes and plerocercodes of Proteocephalidea, Contracaecum sp. Cucullanus sp. Hysterothylacium sp., Procamallanus (Spirocamallanus) sp1., Procamallanus pimelodus larvae, adults of Cucullanus caballeroi, Cucullanus zungaro, Goezia brevicaeca, Procamallanus (S.) sp2., P. freitasi, Paracapillaria rhamdiae, Philometra sp. and Neoechinorhynchus pimelodi. The host sex did not influence parasite indexes. The total length and weight of the hosts had some influence on the parasite indexes. Parasite communities of C. conirostris, D. emarginatus, P. pohli and C. fowleri were characterized by a low number of central species and few significant interspecific associations. Austrodiplostomum compactum, Contracaecum sp. and N. pimelodi were common on parasite communities of four hosts studied. The parasitics communities of these siluriformes were analyzed in first time with the exception of C. conirostris. Iheringtrema iheringi, Kalipharynx sp., C. caballeroi, G. brevicaeca and P. rhamdiae constitute new records for the S?o Francisco River, expanding their geographic distributions and their host?s lists. === Esp?cimes de Conorhynchos conirostris (Valenciennes, 1840), Duopalatinus emarginatus (Valenciennes, 1840), Pimelodus pohli Ribeiro & Lucena, 2006 e Cephalosilurus fowleri Haseman, 1911, peixes end?micos do rio S?o Francisco, foram coletados da regi?o do alto rio S?o Francisco, Minas Gerais, ? jusante da barragem de Tr?s Marias (18?12?32??S e 45?15?41??W), no per?odo de abril de 2008 a janeiro de 2012. Foram encontradas 23 esp?cies de parasitos: Demidospermus uncusvalidus, Scleroductus sp., Pavanelliella pavanellii, metacerc?rias de Austrodiplostomum compactum, Creptotrema creptorema, Crepidostomum platense, Iheringtrema iheringi, Karipharynx sp. Prosthenhystera obesa, metacest?ides e plerocerc?ides de Proteocephalidea, larvas de Contracaecum sp. Cucullanus sp. Hysterothylacium sp., Procamallanus (Spirocamallanus) sp1., Procamallanus pimelodus, adultos de Cucullanus caballeroi, Cucullanus zungaro, Goezia brevicaeca, Procamallanus (S.) sp2., P. freitasi, Paracapillaria rhamdiae, Philometra sp. e Neoechinorhynchus pimelodi. O sexo dos hospedeiros n?o influenciou os ?ndices parasit?rios. O comprimento e o peso dos hospedeiros tiveram influ?ncia sobre os ?ndices parasit?rios. As comunidades parasit?rias de C. conirostris, D. emarginatus, P. pohli e C. fowleri foram caracterizadas pelo baixo n?mero de esp?cies centrais e poucas associa??es interespec?ficas significativas. Austrodiplostomum compactum, Contracaecum sp. e N. pimelodi foram comuns ?s comunidades parasit?rias dos quatro hospedeiros estudados. ? a primeira vez que as comunidades parasit?rias desses siluriformes s?o analisadas com exce??o de C. conirostris. Iheringtrema iheringi, Kalipharynx sp., C. caballeroi, G. brevicaeca e P. rhamdiae constituem-se novos registros para o rio S?o Francisco, ampliando suas distribui??es geogr?ficas.
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