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Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Lucas R Forti conceived and designed the experiments, performed the experiments, analyzed the data, wrote the paper, prepared figures and/or tables.

William P Costa performed the experiments, contributed reagents/materials/analysis tools, reviewed drafts of the paper.

Lucas B Martins contributed reagents/materials/analysis tools, reviewed drafts of the paper.

Carlos H L Nunes-de-Almeida contributed reagents/materials/analysis tools, prepared figures and/or tables, reviewed drafts of the paper.

Luís Felipe Toledo conceived and designed the experiments, reviewed drafts of the paper.

Data Deposition

The following information was supplied regarding data availability:

Acoustic recordings used in the work are available in the Fonoteca Neotropical Jacques Vielliard, with collection numbers FNJV 10498, 10577, 12222–24, 12228, the Smithsonian Institution website (http://vertebrates.si.edu/herps/frogs_boraceia/list.htm), and the personal collection of Ariovaldo A. Giaretta, which are detailed in the appendix of Martins & Giaretta (2012).

Funding

Funding was provided by Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) (fellowships (2013/09964-2, 2013/21519-4 and 2013/02219-0)); and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) (fellowships (302589/2013-9, 152548/2011-4) and a research grant (405285/2013-2) to LFT). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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