‘Steak-knife’ teeth reveal ecology of oldest land predators

The first top predators to walk on land were not afraid to bite off more than they could chew, a study has found. Researchers suggest that Dimetrodon, a carnivore that walked on land between 298 million and 272 million years ago, was the first terrestrial vertebrate to develop serrated ziphodont teeth.
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Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_science/~3/13yFpKOCDhU/140207083925.htm

    

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