A new primitive hadrosauroid dinosaur from the Early Cretaceous of Inner Mongolia (P.R. China)

Pascal GODEFROIT, Hong LI & Chang-Yong SHANG

en Comptes Rendus Palevol 4 (8) - Pages 697-705

Published on 31 December 2005

The right dentary of a new hadrosauroid dinosaur, Penelopognathus weishampeli, has been discovered in the Bayan Gobi Formation (Albian, Lower Cretaceous) of Inner Mongolia (P.R. China). This new taxon is characterised by its elongated, straight dental ramus, whose lateral side is pierced by about 20 irregularly distributed foramina. Its dentary teeth appear more primitive than those of Probactrosaurus, but more advanced than those of Altirhinus, both also from the Lower Cretaceous of the Gobi area. Non-hadrosaurid Hadrosauroidea were already well diversified in eastern Asia by Early Cretaceous time, suggesting an Asian origin for the hadrosauroid clade.


Hadrosauroidea, Early Cretaceous, Inner Mongolia, Palaeogeography

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