According to a new study, a genre of carnivorous dinosaur that once rambled Madagascar 70 million years ago was so robust on its teeth that they required to be replaced frequently. The researchers have found that Majungasaurus had to replace its mouth full of teeth approximately every two months, increasing replacement in each socket anywhere from two to 13 times faster than other carnivorous dinosaurs. This study got published on Wednesday in the journal PLOS ONE. Michael D’Emic, the study author and assistant professor of biology at Adelphi University in New York, has stated this meant they were wearing down on their teeth promptly, probably because they were nibbling on bones. There is definite evidence for this in the form of scratches and avulses that match the spacing and size of their teeth on a variety of bones from animals that would have been their hunt.
Majungasaurus was about 21 feet long dominated supreme at the top of the food chain on Madagascar. Its sharp teeth could chop like knives through the flesh of its hunt. It also had a short snoot and a horn projecting from the top of its head. But its teeth, meant for ripping through flesh, were not so great when they faced with bone. Chewing on bones, something that some animals like beaver do can provide them with some nutrients else indifferent from their diets. D’Emic also stated that it is their working hypothesis for why they had such high rates of replacement. The rate of the tooth growth was so fleet that it lines up with the prompt ability sharks have of replacing their teeth, as well as the considerable herbivore dinosaurs.
Researchers resolved growth rings on the teeth of Majungasaurus. They act like the rings of a tree, but instead of recording a year, the orb record a single day. This analysis was likened with computerized tomography on its jaws to look at teeth growing inside them. Attached, this data revealed how promptly the dinosaurs could replace their teeth.