Cainotheriidae

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Cainotheriidae (superorder Paraxonia, order Artiodactyla) A family of small artiodactyls from the late Eocene and Oligocene of Europe that lacked gnawing front teeth but otherwise seem to have resembled hares and rabbits. Their hind legs were markedly elongated, implying a hopping gait. They became extinct in the Miocene, apparently displaced by early members of the true Lagomorpha.