作者：王  强，李雨光，朱旭峰，方开永，汪筱林

摘要：记述了发现于莱阳上白垩统将军顶的半枚蛋化石，据其保存较尖的一端，蛋壳外表面光滑无纹饰，蛋壳较薄，紧密排列的棱柱状壳单元，壳单元边缘由致密的方解石组成，以及气孔较少，气孔呈圆形或椭圆形等特征，将其归入棱柱形蛋科，建立新蛋属新蛋种：梨乡莱阳蛋(Laiyangoolithus lixiangensis oogen. et oosp. nov.)。梨乡莱阳蛋的发现不仅丰富了莱阳恐龙蛋化石群组成，同时也增加了棱柱形蛋类的古地理分布，并为研究伤齿龙类的多样性和古地理分布提供了新的证据。 
关键词：山东莱阳，晚白垩世，将军顶组，恐龙蛋，棱柱形蛋 
卷期：第56卷，第3期

New ootype prismatoolithids from the Late Cretaceous, Laiyang Basin and its significance

　　WANG Qiang, LI Yu-Guang, ZHU Xu-Feng, FANG Kai-Yong, WANG Xiao-Lin

Abstract   Here we discribe a new ootypes of prismatoolithids found from the Late Cretaceous Jiangjunding Formation in the Laiyang Basin, Shandong Province. On the basis of characters such as elongate ovoids, smooth eggshell surface, relatively thinner eggshell thickness, prismatic eggshell units, slender pores in radial section of eggshell and little pores with round or irregular shapes in tangeital section of eggshell, we erect one new oogenus and one new oospecies: Laiyangoolithus lixiangensis oogen. et oosp. nov. The discovery of L. lixiangensis not only enriches the diversity and composition of the Laiyang Dinosaur Egg Fauna, but the paleogeographic distribution of primatoolithids as well. In addition, it provides more paleontological materials for the study of the diversity and paleogeographic distribution of troodontids in China.  
Key Words   Laiyang, Shandong; Late Cretaceous; Jiangjunding Formation; dinosaur eggs, Prismatoolithidae