Tarchia

Tarchia is a genus of nodosaurid dinosaur that lived during the Late Cretaceous period in what is now Mongolia. It is known from a single species, Tarchia gigantea. Tarchia was a large, herbivorous dinosaur, measuring up to 8 meters (26 feet) in length and weighing an estimated 4 tons. It was characterized by its heavily armored body, covered in bony plates called osteoderms, and a long, whip-like tail. The skull of Tarchia was relatively small and triangular, with a beak-like mouth used for stripping vegetation.

Fossils of Tarchia have been found in the Nemegt Formation, a rich fossil site in the Gobi Desert. This formation dates back approximately 70 to 66 million years, placing Tarchia among the last non-avian dinosaurs to exist. Tarchia's armor would have provided protection against predators like tarbosaurus. Its herbivorous diet suggests it grazed on low-lying plants, ferns, and possibly cycads. The discovery of Tarchia has contributed significantly to our understanding of dinosaur diversity and evolution in Asia during the Late Cretaceous.