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By: Fernandes, Berenice M. M. - Menezes, Rodrigo Caldas - Tortelly, Rogério - Noronha, Dely - Pinto, Roberto MagalhãesType: ArticleIn: Revista Brasileira de ZoologiaVolume:Series:Issue:Date: 2007-06-01Page Range:Publication Info:Subjects: Anatidae Anseriformes Birds Brazil digeneans Psilostomidae