Canadian and Argentinian researchers recreated brain, inner ear and surrounding bones of massive tyrannosaur specimens using CT scans. They found that the dinosaurs’ braincases varied more than originally thought.
, oppose the predominant belief that dinosaur brains and braincases varied little between dinosaurs and related species.
The digital reconstructions of the two Daspletosaurus brains could show that they come from difference species of the daspletosaurs, Miyashita added. According to the press release, it's not common to look at and model braincases of multiple dinosaur specimens due to the hundreds of hours of work and medical technology, such as a CT scanner, required to access the braincase. Most braincase studies use one specimen from a representative species of the group.
Dinosaur braincase expert in Argentina and co-author of the study at the Instituto de Investigations en Biodiversidad y Medioambient, Ariana Paulina Carabajal, provided detailed models of the brain, inner ear and braincase. The researchers found that there were large bony canals that would have housed nerves to move the eyeballs, and also large air sacs that filled most of the braincase bones.
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