A brachiosaur tooth found in South Korean sediments represents the first evidence that this huge, plant-eating dinosaur once roamed Asia, say the researchers who dug up the tooth.
Brachiosaur teeth are easy to recognize, explains Jong-Deock Lim, a paleontologist at the Natural History Museum at the University of Kansas in Lawrence. When the top and bottom teeth wore against each other, the crowns developed chisel-shaped surfaces that were self-sharpening. Many large, herbivorous dinosaurs instead had rounded, spoon-shaped teeth, Lim says.
The 3-centimeter-long brachiosaur tooth was found near Jingu, South Korea, along a dinosaur trackway. The tracks had been imprinted in sediments laid down along the shore of a freshwater lake between 110 and 125 million years ago. Lim and his colleagues describe their discovery, which has been posted online, in an upcoming issue of Naturwissenschaften.