@article{silva_carvalho_2011,  title={A taxonomic and morphological redescription of Potamotrygon falkneri Castex & Maciel, 1963 (Chondrichthyes: Myliobatiformes: Potamotrygonidae)},  volume={9},  ISSN={1679-6225},  url={https://doi.org/10.1590/S1679-62252011000100021},  DOI={10.1590/S1679-62252011000100021},  number={1},  journal={Neotropical Ichthyology},  publisher={Sociedade Brasileira de Ictiologia},  author={Silva, João Paulo C. B. da and Carvalho, Marcelo R. de},  year={2011},  month={Mar},  pages={209–232} }