A new iguanodontid (Jinzhousaurus yangi gen. et sp. nov.) from the Yixian Formation of western Liaoning, China |
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Authors: | Xiaolin Wang Xing Xu |
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Institution: | (1) Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, 100044 Beijing, China;(2) College of Earth Sciences and Resources, China University of Geosciences, 100083 Beijing, China |
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Abstract: | A new iguanodontid,Jinzhousaurus yangi gen. et sp. nov., is erected based on the cranial and dental morphology of a specimen from the Yixian Formation of western
Liaoning. Although a few primitive characteristics remain,Jinzhousaurus yangi display a number of characteristics similar to those seen in derived iguanodontids. Other interesting characteristics include
the absence of antorbital fenestra and the frontal excluded from the participation in orbit, which are closer to the condition
in hadrosaurids. The unusual combination of the characteristics provides important data for assessing morphological evolution
toward hadrosaurs. The new discovery also represents the first reported large-sized dinosaur from Jehol fauna in western Liaoning,
and increases the diversity of this famous fauna. Furthermore, the discovery of a derived iguanodontid from the Yixian Formation
provides further evidence supporting a Cretaceous age of the Jehol fauna, which is consistent with an isotopic age. |
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Keywords: | Western Liaoning Lower Cretaceous Yixian Formation Jehol Biota Iguanodontid |
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