Dinosaurs · Armoured dinosaur

Tarchia

Say it TAR-kee-ah. The name means ‘brainy one’.

Tarchia beside a person 1.75 m tall. Ticks mark every metre.Body shape drawn for this site, showing the general build of armoured dinosaurs

Length: 5.5 m
Diet: Plant-eater
When: Late Cretaceous75 to 70 million years ago
Fossils found in: Mongolia
Named by: Maryanska (1977)
Family tree: Dinosauria › Ornithischia › Thyreophora › Ankylosauria › Ankylosauridae

Where Tarchia sits in the age of dinosaurs.Periods from the ICS chart; dinosaur dates from the Natural History Museum

Armoured dinosaurs. Plated and armoured plant-eaters, such as Stegosaurus and the ankylosaurs. See all 33

Lived at the same time

Alectrosaurus · same country
Anserimimus · same country
Borogovia · same country
Microceratus · same country
Mononykus · same country
Prenocephale · same country
Protoceratops · same country
Saurolophus · same country

Other armoured dinosaurs

Edmontonia Late Cretaceous
Euoplocephalus Late Cretaceous
Panoplosaurus Late Cretaceous
Saichania Late Cretaceous
Pinacosaurus Late Cretaceous
Ankylosaurus Late Cretaceous
Struthiosaurus Late Cretaceous
Talarurus Late Cretaceous

Source: Tarchia in the Natural History Museum Dino Directory, read 12 November 2026. Sizes are the museum's estimates for a typical adult. "Lived at the same time" lists dinosaurs whose dates overlap, which does not always mean they met.