Medindia

X

How Jaws Influenced Dinosaurs' Feeding Style, Diet Preferences

by Bidita Debnath on  November 5, 2015 at 12:23 AM Research News   - G J E 4
At the University of Bristol, researchers have now revealed that the feeding style and dietary preferences of dinosaurs were closely linked to how wide they could open their jaws.
 How Jaws Influenced Dinosaurs' Feeding Style, Diet Preferences
How Jaws Influenced Dinosaurs' Feeding Style, Diet Preferences
Advertisement

Using digital models and computer analyses, Dr Stephan Lautenschlager studied the muscle strain during jaw opening of three different theropod dinosaurs with different dietary habits.

‘Researchers from the University of Bristol studied the muscle strain during jaw opening of three different theropod dinosaurs with different dietary habits.’
Advertisement
Theropods were a diverse group of two-legged dinosaurs that included the largest carnivores ever to walk the Earth.

"Theropod dinosaurs, such as Tyrannosaurus rex and Allosaurus, are often depicted with widely-opened jaws. Yet, no studies have actually focused on the relation between jaw musculature, feeding style and the maximal possible jaw gape," said Dr Lautenschlager.

The research looked at T rex, a large sized meat-eating theropod with a massively built skull and up to 15 cm long teeth and two other predatory and meat-eating theropods.

All muscles, including those used for closing and opening the jaw, can only stretch a certain amount before they tear. "This considerably limits how wide an animal can open its jaws and, therefore, how and on what it can feed," the researchers noted.

The results found that the carnivorous Tyrannosaurus and Allosaurus were capable of a wide gape (up to 90 degrees) while the herbivorous Erlikosaurus was limited to a small gape (around 45 degrees).

Between the two carnivores, Tyrannosaurus could produce a sustained muscle (and, therefore, bite) force for a wide range of jaw angles, which would be necessary for biting through meat and skin and crushing bone.

"We know from living animals that carnivores are usually capable of larger jaw gapes than herbivores, and it is interesting to see that this also appears to be the case in theropod dinosaurs," Dr Lautenschlager concluded.

The research was published in the journal Royal Society Open Science.

Source: IANS
Advertisement

Post your Comments

Comments should be on the topic and should not be abusive. The editorial team reserves the right to review and moderate the comments posted on the site.
User Avatar
* Your comment can be maximum of 2500 characters
Notify me when reply is posted I agree to the terms and conditions

You May Also Like

Advertisement
View All