Classification: Ornithischians


The Pachycephalosaurus, a distinctive dinosaur of the late Cretaceous period, stands out among its prehistoric peers due to its unique features and behaviors. By reading this article you will get a better understanding of the Thick Headed Lizard.


Ankylosaurus, a formidable armored dinosaur, was a colossal creature that roamed the Earth during the late Cretaceous period, approximately 70 to 65 million years ago.


Psittacosaurus (meaning “parrot lizard”) was a small, very primitive ceratopsian. This fast-moving plant-eater had a narrow, horny beak with no teeth, and cheek teeth towards the rear of the mouth. It had a boxy skull with short, horn-like projections on the cheeks. It had four long fingers on each hand; the arms were much shorter than the legs.


Parasaurolophus was a long-crested, duck-billed dinosaur. Its extremely long, backward leaning, hollow, bony crest was as bigger than the rest of its skull and may have been used to produce a very loud sound.


Unaysaurus, a member of the Unaysaurid genus, represents an intriguing chapter in the evolutionary tapestry of sauropod dinosaurs. Contrary to common perceptions of sauropods as towering giants, Unaysaurus was a relatively diminutive species, measuring only 70 to 80 centimeters in…