Ancient Sea Lizard Had Shark-like Fin

Posted: September 13, 2013

By: VOA News

It was a lizard with a shark-like fin. That’s what Swedish researchers have discovered about the fearsome mosasaur Prognathodon, which lived in the seas of the Cretaceous Period about 70 million years ago.

The discovery was based on a fossil found in Jordan in 2008. Researcher Johan Lindgren, of Lund University in Sweden, travelled to Jordan in 2011 and discovered that imprints of soft tissue had been preserved around the creature’s tail fin, which ultimately led to the conclusion about its shape. The fossil proved to be the first one of its kind that revealed the tail fin contour in its entirety. But unlike a shark fin, the mosasaur’s fin faced downward.

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