三尖中兽科(Triisodontidae)是已灭绝的一科中爪兽目。三尖中兽科都生存于古新世的北美洲。[1]三尖中兽科是继恐龙灭绝后,北美洲最先出现的大型掠食哺乳动物。[2]它们有较不进化的牙齿,这是与其他中爪兽目不同的地方。[3]
由于三尖中兽科的牙齿较为简单,它们被认为是中爪兽目的基底。一些学者将三尖中兽科看为踝节目,或甚至是熊犬科,而非中爪兽目。
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