| Ref. No. | Title | 86906 | An unusual, dwarf new species of neotropical freshwater stingray, Plesiotrygon nana sp. Nov., from the upper and mid Amazon Basins: the second species of Plesiotrygon (Chondrichthyes: Potamotrygonidae). | 86912 | An unusual, dwarf species of neotropical freshwater stingray, Plesiotrygon nana sp. nov., from the upper and mid Amazon basin: the second species of Plesiotrygon (Chondrichthyes: Potamotrygonidae). |
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