Tooth Diamantinasaurus matildae AODF 2298 (AODL 127) (possibly from the same individual as AODF 836). (a – o) Right upper tooth in mesial (a, b), mesiolabial (c), labial (d), distolabial (e, f), distal (g, h), distolingual (i), lingual (j), Mesolingual (k, l), apical (m, n) and basal (o) views. (a), (e), (g), (k), (m) and (o) are photographs; all other images are screenshots of digital models. Ladder bar = 10 mm. Credit: Royal Society Open Science (2022). DOI: 10.1098 / rsos.220381
A team of researchers from the Australian Age of Dinosaurs Natural History Museum The Jump-Up, working with colleagues at the University of New England and University College London, has discovered sauropod tooth fossils in the formation of Upper Cretaceous winter from Queensland to Australia. In his article published in the journal Open Science of the Royal Society, the group describes their finding and their importance in understanding the history of creatures in Australia.
Sauropods were large dinosaurs that ate long-necked plants that lived in many parts of the world. Fossils have been found in many countries, but have been rare in Australia due to their unique geography. The country has very few places where Cretaceous or Jurassic rocks are exposed on the surface. The site of the excavation of this new effort, called Mitchell, is little more than a small mound protruding from an extensive, flat landscape used to graze sheep. The site has so far yielded 17 sauropod teeth.
The researchers point out that sauropods did not chew their food and therefore had no molars. All his teeth were semiconical and curved with a pointed end and were slightly displaced. The dinosaurs would have used them along with the tongue and jaw to grab leaves and cut them in the mouth, which they would consume as is, no preprocessing took place in the mouth. Thus, the intestine would have had to do all the work, a process that could take up to two weeks.
Investigators found marks on their teeth indicating that they had worn out from constant eating. The brands also provided clues about the types of plants the dinosaur had been consuming: flowering plants, conifers and gingkos, and possibly ponytails, which no longer grow in Australia. Limits on the length of the creatures ’necks indicate that they probably ate from plants that had leaves that were about 1 meter from the ground at about 10 meters. The researchers obtained accurate measurements of the teeth by making molds, which were then coated with a very thin layer of gold, which allowed the study of dental characteristics using an electron microscope.
Fast tooth, curious tooth? A new study uncovers a new approach to plant-based diet, unique to long-necked dinosaurs. More information: Stephen F. Poropat et al, Sauropod dinosaur teeth of the Winton Formation of the Lower Upper Cretaceous of Queensland, Australia and the World Register of Early Titanosauriformes, Royal Society Open Science (2022). DOI: 10.1098 / rsos.220381
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Quote: Rare sauropod dinosaur teeth discovered in Australia (2022, July 14) recovered on July 15, 2022
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