Silva, J.P.C. da and Carvalho, M.R. de 2011. A new species of Neotropical freshwater stingray of the genus Potamotrygon Garman, 1877 from the Río Madrede Díos, Peru (Chondrichthyes: Potamotrygonidae) . Papéis Avulsos de Zoologia. 51, 8 (Jan. 2011), 139–154. DOI:https://doi.org/10.1590/S0031-10492011000800001.