This video reconstruction shows a pair of Kostensuchus atrox clashing over food. With a final, crushing bite, the defender drives its challenger back while letting out a victory snarl and flashing its fearsome teeth. (Gabriel Diaz Yanten / National Geographic)

A newly unearthed fossil has led experts to believe an ancient species of crocodile may have been an apex predator that hunted dinosaurs on land.

Paleontologist and National Geographic Explorer Diego Pol and his team helped to uncover the remains of Kostensuchus atrox, a previously unknown species of crocodile in Patagonia, close to Antarctica, that lived around 70 million years ago.

With its longer legs, scientists think this species may have been more land-oriented than the crocodiles of today, and potentially died around the Ice Age with the dinosaurs.

Experts say this croc was a hypercarnivore, which means it almost exclusively ate meat. It's estimated to have measured 11.5 feet long and weighed about 550 pounds.

According to Pol, it had "teeth that are comparable to a T. rex" with massive jaw muscles that could "break you in two pieces with a single bite."

Pol, along with his colleagues and researchers from Brazil and Japan, described the fossil discovery on Aug. 27 in the journal PLOS One.

Find more about the discovery at NatGeo.com.