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interfemoral membrane
The interfemoral membrane, or uropatagium, is the membrane that stretches between the legs of bats, pterosaurs and other animals like flying squirrels and colugos.
==Bats==
In bats, the uropatagium extends between the legs and tail, though in tail-less/short tailed species the uropatagium either connects both legs directly (such as in phyllostomids), or is reduced to a pair of membranes along each inner side of the leg (such as in flying foxes). The uropatagium is supported by the calcar, a rod of cartilage that helps expand this membrane. The uropatagium is primarily used in flight control, allowing the bat to steer to a high degree of efficiency in the air.〔Sharon Swartz, Aeromechanics of highly maneuverable bats, February 19th, 2014〕 Insectivorous species also use the uropatagium to capture insects, forming trapping pouches that hold their prey.
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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