A Parataxonomic Revision of Spheroolithid Eggs from the Upper Cretaceous Quantou Formation in Changtu, Liaoning Province
详细信息
- 责任者：Liu Jinyuan (Dalian Natural History Museum ; Dalian 116000 ; China) ; Wang Qiang
- 刊名：Vertebrata Palasiatica
- 出版年：2013
- 卷期：51(4)
- 关键词：恐龙蛋 ; dinosaur eggs ; 辽宁 ; Liaoning Province
- 页码：p.278-288
- 图表：8 illus., 26 refs.
- 分类号：1101
- issnNo：ISSN1000-3118
- isbnNo：CN11-1905/Q
摘要
We re-described the dinosaur eggs from the Upper Cretaceous Quantou Formation in Changtu, Liaoning Province. Based on the macrostructure of eggs and the microstructure of eggshells： spheroid or near-spheroid eggs, thick eggshell, bamboo-leaves-like or lanceolate wedges in cone, clear inter-wedge spaces, columnar layer composed of more than 4 superimposed eggshell units, these eggs are assigned to Spheroolithus spheroides （Young, 1954） Zhao, 1979, and Spheroolithus megadermus （Young, 1959） Zhao, 1979, respectively. With the comparison of dinosaur egg assemblages from Changtu in Liaoning Province and Laiyang in Shandong Province, the Quantou Formation should be corresponding to the early-middle Late Cretaceous.