Ceratopsians and Pachycephalosaurs Ceratopsians and Pachycephalosaurs Around 144 million years ago, began the emergence of the ornithischian dinosaur dinosaurs during the cretaceous period and diversified into North America and Asia. Ornithischians were separate as having a hip structure similar to that of birds, although they ar not the descendants of birds. Marginocephalians, meaning "fringed heads" are a group of Ornithischians that have a distinctive skull structure, consisting of a sensitive shelf or bony frill on the keister of the skull, a unique palate, and a short hip structure.
These herbivores imply two major groups: the Ceratopsians and the Pachcephalosaurians. These plant-eaters include the Ceratopsians, horned dinosaurs such as the Triceratops, Styrachosaurus, Pentaceratops, and the Protoceratops. Pachycephalosaurians, thick-skulled dinosaurs like such as the Stegoceras and the Pachycephalosaurus. (1) Ceratopsians and Pachycephalosaurs are tight r...If you want to get a full essay, order it on our website:
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