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Megadermatidae (false vampires; order Chiroptera, suborder Microchiroptera) A family of bats in which the ears are large, joined extensively, and have a tragus that is very large, the eyes are relatively large, and the nose has a well-developed leaf, often concealing the nostrils. The uropatagium is not wrapped around the body when the animal sleeps. There is no tail. There are four genera, with five species, distributed widely throughout the Old World tropics.