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Austropotamobius torrentium
''Austropotamobius torrentium'', also called the stone crayfish, is a European species of freshwater crayfish in the family Astacidae. It is mostly found in tributaries of the Danube, having originated in the northern part of the Balkan Peninsula.
==Description==
''A. torrentium'' grows to a length of around , and has a smooth brown carapace, with an untoothed triangular rostrum; the underside is creamy white. Males have larger claws than females, but females have a noticeably larger abdomen.〔 As in other crayfish, the first two pairs of pleopods are specialised for sperm transfer in males, while the female's pleopods are uniform, and used for brooding eggs.〔
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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