| Ref. No. | Title | 39984 | A systematic revision of the South American freshwater stingrays (Chondrichthyes: Potamotrygonidae). | 39985 | Further comment on the nomenclature of the freshwater stingray Elipesurus spinicauda Schomburgk, 1843 (Chondrichthyes, Potamotrygonidae). |
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