山东莱阳厚皮圆形蛋碎蛋壳的修订

• 作 者: 张蜀康
• 机 构: 中国科学院古脊椎动物与古人类研究所,中国科学院脊椎动物演化与人类起源重点实验室 北京100044
• 出 处: 古脊椎动物学报
• 发表日期: 2022年1期
• 关键词: Laiyang Shandong Spheroolithus Multifissoolithus dongyangoolithid eggs

1958年在山东莱阳赵疃村发现了一种特殊类型的恐龙蛋化石.尽管只发现了一枚较大的蛋壳碎片,但其极大的厚度表明它是一个新的蛋种.研究者根据蛋壳径切面的显微结构将它归入圆形蛋科的圆形蛋属并命名为厚皮圆形蛋.然而,与新近报道的产自中国浙江省和日本山口县的多裂隙蛋属的弦切面结构进行对比发现,它们都具有大致平行并且呈波浪状的裂隙.因此将产自莱阳的这块蛋壳碎片重新归入东阳蛋科的多裂隙蛋属,并讨论了东阳蛋类近蛋壳内表面的致密层以及东阳蛋类的时空分布情况.同时,产自辽宁昌图的厚皮圆形蛋的归入标本成为新修订的泉头圆形蛋的正型标本.“,”In 1958,a special type of dinosaur egg was discovered in Zhaotuan,Laiyang,Shandong Province,China.Although only a large eggshell fragment was collected,its extremely large thickness indicated that the eggshell fragment represented a new ootaxon.In previous studies,it was named Spheroolithus megadermus and assigned to the oogenus Spheroolithus under the oofamily of the Spheroolithidae based on the microstructure in radial view.However,a comparative study of the microstructure in tangential views between the large eggshell fragment from Laiyang and the recently reported Multifissoolithus from Zhejiang Province,China and Yamaguchi,Japan revealed that all of them have roughly paralleled and wavy clefts.Therefore,this study reassigned the large eggshell fragment from Laiyang to Multifissoolithus of the Dongyangoolithidae and discussed its unique compact layer near the eggshell\'s inner surface,as well as the chronological and spatial distribution of dongyangoolithid eggs.The reassignment of the holotype of Spheroolithus megadermus also indicates that the referred specimen of Spheroolithus megadermus from Changtu,Liaoning Province becomes the holotype of a new oospecies Spheroolithus quantouensis.