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Rhinopomatidae (mouse-tailed bats; order Chiroptera, suborder Microchiroptera) A family of bats in which the tail is very long and thin, projecting well beyond the edge of the small uropatagium. A fleshy, naked pad surrounds the nostrils, but is not a true nose leaf, being used only to close the nostrils between breaths. The bats are distributed throughout northern-hemisphere deserts and arid lands from Africa to Sumatra. There are three species in a single genus, Rhinopoma.