地质学报（英文版）2009，Vol.83Issue(2)：200-206,7.
A New Basal Neoceratopsian Dinosaur from the Middle Cretaceous of Jilin Province, China
A New Basal Neoceratopsian Dinosaur from the Middle Cretaceous of Jilin Province, China
摘要
Abstract
A new basal neoceratopsian dinosaur, Helioceratops brachygnathus gen. et sp. nov., is described from the Quantou Formation (late Early Cretaceous or early Late Cretaceous) in the Liufangzi locality (Jilin province, China). Helioceratops differs from other basal neoceratopsiaus with its deep dentary ramus, its steeply-inclined ventral predentary facet, its heterogeneous dentary crowns, and by the denticles and secondary ridges asymmetrically distributed on either side of the primary ridge on its dentary teeth. Along with Auroraceratops and Yamaceratops, Helioceratops represents one of the most derived non-coronosaurian neoceratopsians. The palaeogeographical distribution of basal neoceratopsians appears limited to northern China and southern Mongolia in the current state of our knowledge. It is therefore probable that this region constituted the birthplace for more advanced, Late Cretaceous Coronosauria.关键词
Dinosauria/Neoceratopsla/Middle Cretaceous/Quantou Formation/Jilin provinceKey words
Dinosauria/Neoceratopsla/Middle Cretaceous/Quantou Formation/Jilin province分类
天文与地球科学引用本文复制引用
JIN Liyong,CHEN Jun,ZAN Shuqin,Pascal GODEFROIT..A New Basal Neoceratopsian Dinosaur from the Middle Cretaceous of Jilin Province, China[J].地质学报（英文版）,2009,83(2):200-206,7.基金项目
The following Chinese funds gave US help for excavation and research:the National Infrastructure of Mineral Rock and Fossil Resources for Sciences and Technology Program(2005DKA21405—7), and the Science and Technology Research and Development Program of Changchun City(04—07SF092). （2005DKA21405—7）
