Saichania

Saichania, meaning 'beautiful one' in Mongolian, was an exceptionally well-armoured ankylosaurid discovered in the Gobi Desert. Lived during the Late Cretaceous, it roamed an arid, sand-swept environment that required specialised physiological adaptations. Its skull contained complex, looping nasal cavities that likely cooled inhaled air and conserved precious body moisture. With an estimated length of over five metres and a stocky, muscular build, Saichania was extraordinarily heavy and well protected, sporting unusually thick dermal plates even covering its underside. Sharp conical osteoderms covered its neck and back, terminating in a solid, bony tail club. Saichania shared its habitat with predators like Tarbosaurus, which would have found penetrating this tank-like herbivore exceptionally difficult.

It possessed complex internal nasal passages that helped cool and humidify dry desert air before it reached the lungs.

Where and when

Saichania lived in the Late Cretaceous, from 75 to 70 million years ago (Campanian age). Its remains come from Mongolia, in the Barun Goyot Formation.

The numbers

Length 5.8 m (estimates run from 5 to 6.6 m). Mass about 2.4 t. Hip height about 1.6 m. That is 3.4 human-lengths, or 0.52 of a double-decker bus. These are estimates from partial skeleton; fields marked estimated by the site are length, mass, hip height.

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