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genus of fossil plants of the Oligocene having flowers resembling those of the witch hazel; found in Baltic region genus Hamamelidanthum , Hamamelidanthum
North American three-toed Oligocene animal; probably not directly ancestral to modern horses mesohippus
any of many extinct cats of the Old and New Worlds having long swordlike upper canine teeth; from the Oligocene through the Pleistocene saber-toothed tiger , sabertooth
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