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Ornithopoda

ARSTANOSAURUS
species undescribed


 
Meaning Of Name: Reptile from Arstan Well
Classification: ORNITHOPODA; Hadrosauridae, Hadrosaurinae
Age: Late Cretaceous (Santonian) Bayn Shireh Formation, 85 million years ago
Locality: Gobi Desert, Peoples' Republic of Mongolia
Cast Size: 15cm in length

This skull is that of a young hadrosaurid or duck-billed dinosaur, possibly aged 3-4 years. Adults were probably 6-7 metres high and up to 15 metres long.

Studies of the microstructure of the bones suggest that the young grew rapidly attaining a height of 40-50 centimetres in the first year after hatching.