English: Tarchia kielanae is a genus of ankylosaurid dinosaur from Mongolia. A medium-sized ankylosaur, it measured around 6 m long and weighed about 2.5 t. Tarchia had a broad, low-slung body, positioned on strong short legs. The body would have been protected by skin ossifications, and it probably had a bony tail club, for active defense against predators. Like other Mongolian ankylosaurines, Tarchia was herbivorous and a low-level bulk feeder, based on its broad muzzle. Ankylosaurids living in dry environments such as Tarchia may have relied more on hindgut fermentation for digestion or, alternatively, consumed succulent plants that did not require complex chewing.