Scientists believe the first creature with teeth was a fish that lived 380 million years ago.
Researchers discovered evidence of teeth in placoderms, an ancient fish species that is believed to be the origin of teeth and jaws in animals. The advantage that this gave them over other species enabled them to become top ocean predators for more than 70 million years. The structure and function of the teeth have remained mostly unchanged since their inception indicating that they were a highly successful adaptation.
"This was the point in history where animals with teeth and jaws started to take over," said researcher Kate Trinajstic. "And when you look at our world today, the dominate vertebrates are the ones who have teeth and jaws."
"Scientists have found fossil evidence of the first animal to grow a set of pearly whites — a prehistoric fish that lived more than 380 million years ago."
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Source: Sydney Morning Herald
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