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spectacled porpoise
The spectacled porpoise (''Phocoena dioptrica'') is a rarely seen member of the porpoise family. The species is readily distinguished from other porpoises by a characteristic dark ring around the eyes, which gives the animals their name. This ring is commonly surrounded by a farther lighter ring.
==Taxonomy==
The spectacled porpoise was first described by Lahille in 1912 from a specimen found on a beach near Buenos Aires. A skull later found in Tierra del Fuego was initially thought to be another species, provisionally named ''Phocoena dioptrica'', but the individual was later shown to be a spectacled porpoise and this name remains a synonym. The Latin word ''dioptrica'' refers to the double eye rings characterizing the creature.
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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