de Carvalho, M. R., M. H. S. Perez, and N. R. Lovejoy. “Potamotrygon tigrina, a New Species of Freshwater Stingray from the Upper Amazon Basin, Closely Related to Potamotrygon Schroederi Fernandez-Yépez, 1958 (Chondrichthyes: Potamotrygonidae)”. Zootaxa, vol. 2827, no. 1, Apr. 2011, pp. 1–30, doi:10.11646/zootaxa.2827.1.1.