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By: Barrio-Amorós, César L - Señaris, Josefa Celsa - MacCulloch, Ross D. - Lathrop, Amy - Guayasamin, Juan M. - Duellman, William E. (William Edward),Type: ArticleIn: Papéis Avulsos de Zoologia (São Paulo)Volume:Series:Issue:Date: 2011-01-01Page Range:Publication Info:Subjects: Guiana Shield Guyana H. angelicus Hylidae Hypsiboas roraima Venezuela