Here we describe two newly discovered dinosaur eggs from the Upper Cretaceous Chishan For-mation in the Qianshan Basin,Anhui Province,East China.These dinosaur eggs can be assigned to a new oospecies of Stalicoolithidae,Shixingoolithus qianshanensis,based on the following combined features:the larger size of eggs,the uniform eggshell microstructure in the radial section,the smaller height and the larger density of radial microstructures at the inner surface of the eggshell.Radial sections of S.qianshanensis show closely arranged columnar eggshell units forming relatively uniform and dense microstructure;some secondary eggshell units and numerous sub-circular radial microstructures appear separately in the middle and inner parts of the tangential sections,respectively.The discovery of S.qianshanensis provides new fossil types of Stalicoolithidae and represents the first dinosaur relative record in the Qianshan Basin,which offer accurate paleontological evidence of Late Cretaceous-Early Paleocene stratigraphic classification in the Qianshan Basin,Anhui Province.

Qing He;Zhong-Liang Chen;Shu-Kang Zhang;Ze-Wen Gui;Ya-Ting Chen

School of Resources and Environmental Engineering,Anhui University,Hefei 230601,Anhui Province,China;State Key Laboratory of Paleobiology and Stratigraphy,Nanjing Institute of Geology and Paleontology,Chinese Academy of Sciences,Nanjing 210008,Jiangsu Province,China;School of Resources and Environment Engineering,Hefei University of Technology,Hefei 230009,Anhui Province,China;Geological Survey of Anhui Province,Hefei 230001,Anhui Province,China;Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences,Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044,China

古地理学报（英文版）

[1]Qing He;Zhong-Liang Chen;Shu-Kang Zhang;Ze-Wen Gui;Ya-Ting Chen-.A new oospecies of Shixingoolithus(Shixingoolithus qianshanensis oosp.nov.)from the Qianshan Basin,Anhui Province,East China)[J].古地理学报（英文版）,2022(04):629-639

oospecies,Shixingoolithus,qianshanensis,oosp,Qianshan,Chishan,Stalicoolithidae

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