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Speed of spinosaurid dinosaur teeth replacement accounts for their overabundance in Cretaceous sites

Still Waters

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Posted (IP: Staff) ·

To date, some species of spinosaurids—medium/large carnivorous dinosaurs with elongated skulls and crocodile-like conical teeth—were known to replace their teeth faster than other theropods, in just two months (replacement rate estimated to be 60–68 days); the research confirms that this is a trait shared by the whole group and provides evidence of how this change occurred, i.e., it was made possible by the development of several replacement teeth at the same time.

Although it is not known precisely why their teeth were replaced so often, it is believed that this allowed them to possess a greater number of functional teeth at all times. This was a decisive advantage when withstanding the considerable effort required to hold their prey by trapping them between their jaws.


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