Description and Phylogenetic Position of Dinosaur Eggshells from the Luanchuan Area of Western Henan Province,China  

作　　者：Kohei TANAKA LU Junchang Yoshitsugu KOBAYASHI Darla K. ZELENITSKY XU Li JIA Songhai QIN Shuang TANG Min＇ an 

机构地区：[1]Department of Geoscience, University of Calgary, Calgary T2N 1N4, Canada [2]Institute of Geology, Chinese Academy of Geological Sciences, Beijing 10037, China [3]Hokkaido University Museum, Hokkaido University, Sapporo 060-0810, Japan [4]Henan Geological Museum, Zhengzhou 450016, China [5]North China University of Water Conservancy and Electric Power, Zhengzhou 450011, China

出　　处：《Acta Geologica Sinica(English Edition)》2011年第1期66-74,共9页地质学报（英文版）

基　　金：supported by the Natural Science Foundation of China(40872017);the Basic Outlay of Scientific Research Work from the Ministry of Science and Technology of the People's Republic of China,and the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry,to L J.C

摘　　要：Here, we examine 145 dinosaur eggshells from a new fossil locality in the Qiupa Formation （Upper Cretaceous） of the Luanchuan area in western Henan Province, China. The eggshells display elongatoolithid macro- and microstructures, including ridges and nodes on the outer surface, two ultrastructurai layers, and an undulatory boundary between the mammillary and continuous layers. A phylogenic analysis shows that the Luanchuan eggshells belong to the ooclade Elongatoolithidae. Within Elongatoolithidae, the thickness ratio of the mammillary layer to the entire eggshell, and the porosity of the Luanchuan eggshells are comparable to the oogenera Macroolithus and Elongatoolithus. There is no direct evidence for the taxonomic identity of the Luanchuan eggshells; however, they were likely laid by oviraptorids based on their phylogenetic position and their similarities with known oviraptorid eggs.Here, we examine 145 dinosaur eggshells from a new fossil locality in the Qiupa Formation （Upper Cretaceous） of the Luanchuan area in western Henan Province, China. The eggshells display elongatoolithid macro- and microstructures, including ridges and nodes on the outer surface, two ultrastructurai layers, and an undulatory boundary between the mammillary and continuous layers. A phylogenic analysis shows that the Luanchuan eggshells belong to the ooclade Elongatoolithidae. Within Elongatoolithidae, the thickness ratio of the mammillary layer to the entire eggshell, and the porosity of the Luanchuan eggshells are comparable to the oogenera Macroolithus and Elongatoolithus. There is no direct evidence for the taxonomic identity of the Luanchuan eggshells; however, they were likely laid by oviraptorids based on their phylogenetic position and their similarities with known oviraptorid eggs.

关 键 词：dinosaur eggshells Qiupa Formation Late Cretaceous Luanchuan Henan Province China 

分 类 号：Q915[天文地球—古生物学与地层学]