| Diet | Herbivore |
| Height | 1.8m |
| Length | 5m |
| Weight | 2 tonnes |
| Speed | 10 km/h |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Ankylosaur |
| Location | Mongolia |
Tarchia was a heavily armoured ankylosaur that roamed the ancient landscapes of Mongolia during the Late Cretaceous period, between 83.6 and 72.2 million years ago. This impressive herbivorous dinosaur was built like a living fortress, with thick bony plates covering its back and sides, making it one of the best-protected plant-eaters of its time.
Measuring about 5 metres in length and standing 1.8 metres tall at the hip, Tarchia weighed approximately 2 tonnes. Its most distinctive feature was its massive skull, which was exceptionally large even by ankylosaur standards. The skull was heavily armoured with thick bone and featured small, triangular teeth perfectly suited for processing tough plant material. Like other ankylosaurs, Tarchia possessed a formidable club-shaped tail that could deliver devastating blows to predators.
This prehistoric giant lived in what is now the Gobi Desert region of Mongolia, which during the Late Cretaceous was a much more lush and verdant environment. Tarchia would have browsed on low-growing plants, ferns, and cycads, using its wide beak to crop vegetation and its small teeth to break down plant matter before swallowing.
The fossil evidence suggests that Tarchia was one of the largest ankylosaurs ever discovered, representing the peak of armoured dinosaur evolution. Its name, meaning 'brainy one', refers to its unusually large skull, though this doesn't necessarily indicate higher intelligence but rather reflects the massive size of its heavily reinforced head.
Tarchia had an exceptionally large, heavily armoured skull that was massive even by ankylosaur standards. Its body was covered in thick bony plates and spikes, and it possessed a powerful club-shaped tail weapon. The dinosaur's wide, beaked mouth was perfectly adapted for cropping low-growing vegetation.
Tarchia likely lived a relatively slow-paced lifestyle, spending most of its time browsing on low-growing plants across the Mongolian plains. When threatened by predators, it probably relied on its heavy armour for protection and could swing its massive tail club as a formidable weapon. Evidence suggests these dinosaurs may have been somewhat social, possibly gathering in small groups for protection.
Tarchia was first described by Teresa Maryańska in 1977. The original fossils were discovered at Nemegt Formation, Mongolia.
