Alticonodon lindoei, new gen. and sp., a triconodont mammal from the early Campanian Upper Milk River Formation, Alberta, is the first known triconodont of Late Cretaceous age, and only the second recorded from post-Jurassic rocks. Progressive specializations in Alticonodon suggest a more highly developed shearing of the postcanine dentition than in geologically older members of the order.
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Richard C. Fox (1969) studied this question.
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