Pegomastax were small, herbivorous dinosaurs with typical teeth, resembling a dog’s teeth. These dinosaurs lived about 200 million years ago in the early Jurassic period, and were not larger than 60 cm in length. Their mouth was shaped like a parrot’s beak.
There were canines Pegomastax 2.5 cm resembling vampire fangs. Posterior teeth were suitable for chewing vegetation.
“It is very strange that the herbivorous dinosaur teeth were such as a dog, an animal that eats meat”, – said Paul Sereno, a paleontologist at the University of Chicago, author of the study.
Some scholars have suggested that this dinosaur ate meat, or, at least, insects, but research has fangs under the microscope showed that they were mostly used for defense and attack in battles with rivals.
Traces of wear on the canines indicate that, most likely, they were used to dig the earth and for the fights with rivals like fangs Muntjacs, also known as barking deer.
Pegomastax dinosaur weighed less than a cat, and, most of all, was covered with long needles. According to Sereno, he looked like a bipedal porcupine, but much more agile than its modern equivalent.