Icaronycteris index, an early Eocene bat (Chiroptera)

    This fossil, the oldest known bat, is an anatomically typical Microchiropteran. The presence of moth scales suggests that Icaronycteris was capable of echolocation. The long tail is atypical of modern bats, but resembles that of the contemporary Mexican free-tailed bat, Tadarida. (from Vaughan 1987)