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butterfly stingaree
The butterfly stingaree (''Urolophus papilio'') is a little-known species of stingray in the family Urolophidae, endemic to the continental slope off the Chesterfield Islands. This species is characterized by a diamond-shaped pectoral fin disc much wider than long, and a rather short tail terminating in a leaf-shaped caudal fin, as well as bearing a dorsal fin and sometimes indistinct lateral skin folds. There is a skirt-shaped flap of skin between its nostrils. It is plain yellowish to brownish above, and reaches a length of at least . The International Union for Conservation of Nature (IUCN) has listed this ray as of Least Concern, since no commercial trawl fishing occurs within its range.
==Taxonomy==
The butterfly stingaree was described by Bernard Séret and Peter Last in a 2003 issue of the scientific journal ''Cybium''; the specific epithet, ''"papilio"'' (Latin for "butterfly"), refers to its wide disc. The first known specimens were collected during a series of research cruises in the Coral Sea, conducted by France and Australia in the 1990s. An adult male long, trawled by the research vessel ''Coriolis'', was designated as the holotype. This species seems to be closely related to the sandyback stingaree (''U. bucculentus'') and the patchwork stingaree (''U. flavomosaicus'').
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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