The parietosquamosal frill is relatively short compared to chasmosaurine ceratopsids but displays complex ornamentation with developed epoccipitals

El Hatzegopteryx se caracterizaba por su impresionante tamaño y su estructura ósea ligera pero resistente

The postcranial body was compact

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Gorgosaurus libratus Protoceratops The parietosquamosal frill is relativelyGorgosaurus libratus is an extinct species of theropod dinosaur belonging to the family Tyrannosauridae, which lived during the Late Cretaceous period, approximately 77 to 75 million years ago (Campanian), in what is now North America. Its fossil remains have been found mainly in Canada, especially in the Dinosaur Park Formation, which has allowed a detailed understanding of its anatomy and ontogeny. Morphologically, Gorgosaurus libratus was a large