Hemitrygon longicauda, the Merauke stingray, is a species of stingray in the family Dasyatidae.Last, P.R. and W. White, 2013. Two new stingrays (Chondrichthyes: Dasyatidae) from the eastern Indonesian Archipelago. Zootaxa 3722(1):001-021.
Hemitrygon longicauda is found in the Western Pacific, where it is endemic to southern New Guinea. This species reaches a length of .
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