A number of characters are seen in multiple species, are taphonomically variable and are not true characters, or are seen gradationally across a large sample set of Lujiatun psittacosaurids suggesting
Article Title: Morphological variation and asymmetrical development in the skull of Styracosaurus albertensis Authors: Robert Holmes (1), Walter Persons (1), Baltej Singh Rupal (2), Ahmed Jawad Qures
The pachyrostran centrosaurine dinosaur Pachyrhinosaurus perotorum is the geologically youngest (Maastrichtian, 70–68.5 Ma) centrosaurine, and latitudinally highest distributed ceratopsid yet k
Tyrannosaurid theropods topped the terrestrial food chain in North America and Asia during the latest Cretaceous. Most tyrannosaurids, exemplified by Tyrannosaurus rex, had deep snouts, thick teeth, a