We thank the curators and curatorial assistants of the Goeldi Museum in Belém and the National Institute for Amazonian Research (INPA) in Manaus for allowing us to obtain tissue samples from the specimens under their care. AA is supported by a CNPq research productivity fellowship, #306843/2016-1. PVC is supported by a CAPES (the Brazilian Higher Education Training Program) doctoral fellowship, #1537057.We also thank CAPES for financial support throughout this study, the UFPA Institute of Coastal Studies and Graduate Program in Environmental Biology, Stephen Ferrari for the revision of the text, and Ciro Albano for providing the photograph of Pipra aureola used in the manuscript. We finally express our acknowledgments to Liviu Parau and one anonymous reviewer for providing valuable suggestions to improve the manuscript.

No abstract