Surprising Discovery of Sharp-Toothed Fossil Links Old and New Dinosaurs       

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WASHINGTON, D.C. (AP).- The surprising discovery of a fossil of a sharp-toothed beast that lurked in what is now the western U.S. more than 200 million years ago is filling a gap in dinosaur evolution. The short snout and slanting front teeth of the find — Daemonosaurus chauliodus — had never before been seen in a Triassic era dinosaur, said Hans-Dieter Sues of the Smithsonian’s National Museum of Natural History. Sues and colleagues report the discovery in Wednesday’s edition of the British journal Proceedings of the Royal Society B. Sues, curator of vertebrate paleontology at the museum, said the discovery helps fill the evolutionary gap between the dinosaurs that lived in what is now Argentina and Brazil about 230 million years ago and the later theropods like the famous Tyrannosaurus rex. Features