'Veggie' dinosaurs differed in how they ate their food currentbiology
Five skulls from the plant-eating group Ornithischia provided the key to unlocking their feeding habits: Heterodontosaurus, Lesothosaurus, Scelidosaurus, Hypsilophodon and Psittacosaurus—earliest representatives of what would become the major herbivore dinosaur groups.
CT reconstructions of the skulls and jaws together with diagrams of where the jaw muscles attach in each dinosaur. The simplified family tree below shows how they are related to each other. Credit: David Button After CT scanning the skulls, the team reconstructed the jaw muscles using data from birds and crocodiles to help indicate where the muscles would have been. They then carried out a"finite element analysis," which involves dividing the skull into thousands of individual parts . The bite force that these muscles can generate is calculated based on their size and arrangement.
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