Sands of the Gobi Desert yield new species of nut-cracking dinosaur

Steve Koppes (USA) Plants or meat – that’s about all that fossils ever tell palaeontologists about a dinosaur’s diet. However, the skull characteristics of a new species of parrot-beaked dinosaur and its associated gizzard stones indicate that the animal fed on nuts and/or seeds. These characteristics present the first solid evidence of nut-eating in any dinosaur. Fig. 2. Artistic rendering of a newly discovered species of parrot-beaked dinosaur, Psittacosaurus gobiensis. Scientists first discovered psittacosaurs in the Gobi Desert in 1922, calling them “parrot-beaked” for their resemblance to parrots. Psittacosaurs evolved their strong-jawed, nut-eating habits 60 million years before the earliest parrot. Art Credit: Todd Marshall “The parallels in the skull to that in parrots, the descendants of dinosaurs most famous for their nut-cracking habits, are remarkable,” said Paul Sereno, a palaeontologist at the University of Chicago and National Geographic Explorer-in-Residence. Sereno, and two colleagues from the People’s Republic of China, announced their discovery on 17 June 2008 in the Proceedings of the Royal Society B. The palaeontologists discovered the new dinosaur, which they have named Psittacosaurus gobiensis, in the Gobi Desert of Inner Mongolia in 2001, and spent years preparing and studying the specimen. The dinosaur is approximately 110 million years old, dating from the mid-Cretaceous. The quantity and size of gizzard stones in birds correlates with dietary preference. Larger, more numerous gizzard stones point to a diet of harder food, such as nuts and seeds. “The psittacosaur at hand has a huge pile of stomach stones, more than 50, … Read More

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