Komodo dragon (Komodo dragon coatiThe Komodo dragon is the largest living predatory lizard, and its serrated, curved, blade-like teeth provide valuable analogues for studying tooth structure and function and for comparison with extinct species such as theropod dinosaurs. The Komodo dragon's teeth only have a thin layer of enamel, but they are still capable of meeting the piercing and pulling feeding demands. A new study reveals that the Komodo dragon's teeth have unique adaptations to maintain their sharpness, with serrations and an orange layer of iron-rich material at the tips of the teeth.
The pigmented cutting edge of a Komodo dragon tooth. Image courtesy of LeBlanc others., doi:10.1038/s41559-024-02477-7.
Native to Indonesia, the Komodo dragon is the largest extant monitor lizard.
These creatures can grow up to 3 metres (10 feet) in length and run at speeds of up to 20 kilometres (12 miles) per hour.
They have sharp, curved teeth similar to those of many carnivorous theropod dinosaurs.
They eat almost any type of meat, from small reptiles and birds to deer, horses and buffalo, tearing and tearing at the flesh of their prey.
“The Komodo dragon, the world's largest lizard, is indisputably an impressive animal,” said Dr Benjamin Tapley, curator of reptiles and amphibians at the Zoological Society of London.
“Having worked with them at London Zoo for 12 years, I continue to be fascinated by them and this latest discovery only further highlights how incredible they are.”
“Komodo dragons are sadly endangered and this discovery not only improves our understanding of how this iconic dinosaur lived, but also helps us to better appreciate this magnificent reptile as we work towards conservation.”
To understand the chemical and structural makeup of Komodo dragon teeth, Dr Tapley, researcher Aaron LeBlanc of King's College London and their colleagues scoured museums for Komodo dragon skulls and teeth.
They also studied the teeth of Ganas, a 15-year-old Komodo dragon who lived at London Zoo.
Using advanced imaging and chemical analysis, the researchers were able to observe that the iron in Komodo dragon enamel is concentrated in a thin coating on the serrations and tips of the teeth.
This protective layer keeps the serrated edges of the teeth sharp and ready to use.
“Komodo dragons, like carnivorous dinosaurs, have curved, serrated teeth for tearing apart their prey,” Dr LeBlanc said.
“We hope to use these similarities to learn more about how carnivorous dinosaurs ate and whether they used iron in their teeth, like the Komodo dragon.”
“Unfortunately, with current technology we can't tell you whether fossil dinosaur teeth had a lot of iron or not.”
“We suspect that chemical changes that occur during fossilization may obscure how much iron was originally present.”
“But what we found is that large carnivorous dinosaurs like Tyrannosaurus had changed the structure of the enamel on the cutting edges of their teeth.”
“So while the Komodo dragon changed the chemical composition of its teeth, some dinosaurs changed the structure of their tooth enamel to maintain a sharp cutting edge.”
“Further analysis of Komodo's teeth may reveal other markers within the iron coating that were not altered during fossilization.”
“With these markers, we can know for sure whether dinosaurs also had iron-plated teeth, giving us a better understanding of these ferocious predators.”
of Investigation result Published in a journal Natural Ecology and Evolution.
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ARH LeBlanc othersKomodo dragon teeth encrusted with iron and intricate dental enamel of carnivorous reptiles. Nat Ecol EvolPublished online July 24, 2024, doi: 10.1038/s41559-024-02477-7
Source: www.sci.news
