https://www.utoronto.ca/news/did-dinosaurs-have-lips-ask-university-toronto-paleontologistCan a crocodiles smile reveal whether dinosaurs had lips? What if lips and gums hid most of dinosaur's teeth?
New findings from University of Toronto vertebrate palaeontologist Robert Reisz challenge the idea of what therapods might have looked like when dinosaurs roamed the earth.His research will be presented today at a conference at U of T Mississauga and it's already making headlines.
When we see dinosaurs in popular culture, such as in the movie Jurassic Park, we see them depicted with big teeth sticking out of their mouths, Reisz says. Large dinosaurs, such as Tyrannosaurus rex, bare a ferocious grin, while smaller creatures such as velociraptors are shown with scaly lips covering their teeth.
The U of T Mississauga expert was curious about which version might be most accurate. We have very little information about dinosaurs soft tissue, he says.
For clues about how therapods might have appeared, he looked to modern-day reptilian predators like crocodiles and monitor lizards. According to Reisz, lipless crocodiles have exposed teeth, much like a Jurassic Park predator, while monitor lizards conceal teeth behind scaly lips that are similar to the movie version of velociraptors.
Lips help to protect teeth, in part by helping to enclose them in a moist environment where they wont dry out, Reisz says. Crocodiles, which spend their time submerged in water, dont need lips for protection. Their teeth are kept hydrated by an aquatic environment, Reisz says.
Reptiles with lips, such as monitor lizards, typically live on land (much like their movie counterparts) where their teeth require different protection. From this, Reisz concludes that dinosaur teeth would likely have been covered by scaly lips.
Personally, I thought this was already a given but other people can also freak out over this and feathers now.
Must go faster if old.