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The reality is that it is a diverse region rich and thriving in its own fauna- dinosaurian or not. What little we know is merely the surface, and continual study will only elucidate this, revealing itself to be not in comparison with the North, but in tandem side by side with it.
Chart of the Dinosaurs and Pterosaurs of Late Maastrichtian Laramidia.
Generalized Chart of Triceratops Through Time.
Triceratops is an index fossil- a fossil used to help date a layer or unit of rock. This is made possible by a multitude of Triceratops specimens, research on its evolution, and a solid foundation on Hell Creek stratigraphy.
In the monograph, it was stated that the bulk of Q. lawsoni were found in a single site- an abandoned channel lake, a body of water cut off from the rest of the floodplain. Because the absence of aquatic vertebrates but abundance of invertebrates, it was posited that...
..and hopefully better understand the evolution, relationships, and diversity of one of the most iconic, yet misunderstood, dinosaur groups known.