Predatory, avian-like theropod dinosaurs from the Upper Cretaceous (1
"All these dinosaurs lived at the same time and in the same place, so it is important to know if they are competing for food resources or if they are targeting different prey species," says Angelica Torices of the Universidad de La Rioja, Spain. "Through this work, we [can] begin to understand the interactions between these predatory dinosaurs in the ecosystem a little better.
" We find predatory coelo dinosaurs generally in the same way by a sting-and-pull But troodontids and dromaeosaurids may have preferred other prey, "she adds, noting that the troodontids apparently prefer lower bites compared to dromeosaurs.Coelaurosaurs include a group of theropod dinosaurs that are closer to birds than other dinosaurs, including The Allosaur (19659005) Torices has always been interested in the teeth of carnivorous dinosaurs, because first she wanted to associate tooth remains with the dinosaur species they came from, and over time she became curious about how different dinosaurs used their teeth. like that with certain tooth shapes and – gr and what she could learn about the life of dinosaurs.
Torices first examined the micro-plane or pattern of small scratches on the teeth to see if they could detect any pattern in the way various dinosaurs feed on it. Together with colleagues, including Ryan Wilkinson of the University of Alberta, Canada, she also used a modeling approach called finite element analysis to solve problems in engineering and mathematical physics and to find out how the dinosaur's teeth behaved most often
Both approaches led to the same general conclusion, she says. All of the dinosaurs studied used a stitch-and-feed feeding motion that produced parallel scratches as they bite into the prey, followed by oblique scratches when the head was pulled back with the jaws closed, the researchers report. However, they found that the different tooth shapes were performed differently under a variety of simulated biting angles.
Evidence suggests that Dromaeosaurus and Saurornithinestes were well-suited for treating prey prey or processing bones as part of their diet. By comparison, Troodon teeth were more likely to fail at difficult bite angles. The findings suggest that troodontids may have preferred softer prey such as invertebrates, smaller prey that may require a less powerful bite or be swallowed whole, or immobile prey such as carrion.
Torices says they are now working to develop more complex models, including teeth with their roots and pines to better understand the biting process.
The dinosaur menu, as shown by calcium
Current Biology Torices et al.: "Puncture-and-pull biomechanics in the teeth of predatory coelo dinosaurs" http://www.cell.com/current-biology/fulltext/S0960 -9822 (18) 30371-3, DOI: 10.1016 / j.cub.2018.03.042