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blackish stingray
The blackish stingray, ''Dasyatis navarrae'', is a little-known species of stingray in the family Dasyatidae, found in the northwestern Pacific Ocean off the coasts of mainland China and Taiwan. This species reaches across and has a chocolate brown, diamond-shaped pectoral fin disc nearly as long as wide. Its whip-like tail bears three large tubercles in front of the stinging spine, as well as both dorsal and ventral fin folds with the ventral fold half as long as the disc. Caught as bycatch in bottom trawls, the blackish stingray is frequently marketed as food in China. The International Union for Conservation of Nature (IUCN) does not yet have sufficient information to assess the conservation status of this species.
==Taxonomy==
Austrian zoologist Franz Steindachner originally described the blackish stingray as ''Trygon navarrae'', in an 1892 volume of the scientific journal ''Denkschriften der Mathematisch-Naturwissenschaftlichen Classe der Kaiserlichen Akademie der Wissenschaften in Wien''. Later authors synonymized the genus ''Trygon'' with ''Dasyatis''. The type specimen is a male across, collected from Shanghai, China.〔Nishida, K. and K. Nakaya (1990). "Taxonomy of the genus ''Dasyatis'' (Elasmobranchii, Dasyatididae) from the North Pacific." in Pratt, H.L., S.H. Gruber and T. Taniuchi. ''Elasmobranchs as living resources: advances in the biology, ecology, systematics, and behaviour, and the status of fisheries.'' NOAA Technical Report, NMFS 90. pp. 327–346.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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