Potamotrygon rex, a new species of Neotropical freshwater stingray (Chondrichthyes: Potamotrygonidae) from the middle and upper rio Tocantins, Brazil, closely allied to Potamotrygon henlei (Castelnau, 1855)
MARCELO R. DE CARVALHO
Published on: 2016-08-16
Page range: 537–565
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