Scientific Name: Pinacosaurus grangeri
Age: Late Cretaceous, 83 MYA
6 inches long
6.5 inches wide
4.5 inches high with jaws
Pinacosaurus (meaning "Plank lizard") is a genus of ankylosaurid dinosaur that lived in Asia during the Late Cretaceous (Santonian-Campanian, roughly 86.3 to 71 million years ago), mainly in Mongolia and China.
The first remains of the genus were found in 1923, and the type species Pinacosaurus grangeri was named in 1933. At least 24 Pinacosaurus skeletons have been found, possibly more than of any other ankylosaur. These predominantly consist of juveniles. Adult fossils have not been found in groups.
Pinacosaurus was a medium-sized ankylosaur, about 5 metres (16 ft) long and weighed up to 1.9 metric tons (2.1 short tons). Its body was flat and low-slung but not as heavily built as in some other members of the Ankylosaurinae. The head was protected by bone tiles, hence its name. Each nostril was formed as a large depression pierced by between three and five smaller holes, the purpose of which is uncertain. A smooth beak bit off low-growing plants that were sliced by rows of small teeth and then swallowed to be processed by the enormous hind gut. Neck, back and tail were protected by an armour of keeled osteoderms. The animal could also actively defend itself by means of a tail club.
see description for size
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