Lonardoni, A.P., Goulart, E., Oliveira, E.F. de and Abelha, M.C.F. 2007. <b>Feeding habitats and trophic overlap of the freshwater stingrays <em>Potamotrygon falkneri</em> e <em>Potamotrygon motoro</em> (Chondrichthyes, Potamotrygonidae) in the upper Paraná river floodplain, Brazil</b&gt; - DOI: 10.4025/actascibiolsci.v28i3.208. Acta Scientiarum. Biological Sciences. 28, 3 (Nov. 2007), 195-202. DOI:https://doi.org/10.4025/actascibiolsci.v28i3.208.