Stagonolepis

Stagonolepis is an extinct genus of archosaur reptile belonging to the aetosaur order. It was about 3 meters (10 ft) long.

An aetosaur, Stagonolepis was a quadrupedal animal covered in thick armoured scales that ran down the length of the its body. A slow-moving browser, it would have used this heavy body armor to repel attacks from contemporary thecodont carnivores. Stagonolepis had a very small head for its size; it was only 25 centimeters (10 in), accounting for less than 10% of the total body length. It had no teeth in the front of its jaws, but instead had a beak-like tip that arched upwards. This would have allowed it to uproot plants in a similar manner to a modern pig. The peg-like teeth at the back of its mouth would have been suitable for chewing tough vegetation, including horsetails, ferns, and the newly evolved cycads.

Fossil remains of the animal have been found in Scotland and in South America.