I am a biogeographer and herpetologist. At first, I studied mainly diversity, biogeography, and conservation related to snake fauna of the Caatinga – a natural region in northeastern Brazil. Currently, my main interests are in historical and conservation biogeography, evolution, herpetology (especially snakes), and diversification processes in open landscapes (Caatinga, Cerrado, Chaco, Pampas, and Pantanal) in the Neotropics. Additionally, I started using molecular phylogenies as a tool to study evolutionary and biogeographical patterns in time and space.

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