汝阳盆地早白垩世恐龙蛋壳的发现及其意义  

Discovery and significance of dinosaur eggshells from the Early Cretaceous Ruyang basin

作　　者：夏梦丽 朱旭峰 徐莉 常华丽 贾松海 李雨 杨丽丽 王强[3] Xia Mengli;Zhu Xufeng;Xu Li;Chang Huali;Jia Songhai;Li Yu;Yang Lili;Wang Qiang(Henan Natural History Museum,Zhengzhou,Henan 450016,China;National Natural History Museum of China,Beijing 100050,China;Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences,Institute ofVertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044,China)

机构地区：[1]河南自然博物馆,河南郑州450016 [2]国家自然博物馆,北京100050 [3]中国科学院脊椎动物演化与人类起源重点实验室,中国科学院古脊椎动物与古人类研究所,北京100044

出　　处：《地质学报》2023年第5期1383-1389,共7页Acta Geologica Sinica

基　　金：国家自然科学基金项目(编号42288201);中国科学院战略性先导科技专项项目(编号XDB26000000);河南省财政厅项目“黄河流域古生物化石产地调查”联合资助的成果。

摘　　要：汝阳盆地是豫西地区的一个中—新生代断陷盆地,自2006年以来发现了一个以巨型蜥脚类恐龙为代表的恐龙动物群。本文描述了近期发现于汝阳盆地下白垩统郝岭组中的若干恐龙蛋蛋壳碎片。基于以下对蛋壳宏观形态和显微特征的分析,这些蛋壳碎片可以归入长形蛋科(Elongatoolithidae)的长形蛋属(Elongatoolithus):蛋壳外表面具分散瘤点状或线性脊状的纹饰;蛋壳自内而外分为锥体层和柱状层,二层之间的界线不清晰;锥体层中锥体排列紧密;柱状层中具波浪状的平行生长纹。这一发现代表了长形蛋属在早白垩世地层中的首次记录,进一步拓展了该蛋属的地史和古地理分布。由以往已知的化石关联推测,这些蛋壳可能与该层位中的窃蛋龙类如刘店洛阳龙(Luoyanggia liudianensis)等具有相关性,表明汝阳盆地在早白垩世晚期具有适宜该类恐龙生存与繁殖的环境。The Ruyang basin is a Meso-Cenozoic graben basin in western Henan Province.A dinosaur fauna,represented by giant sauropod dinosaurs was discovered in 2006.This paper describes several dinosaur eggshells recently discovered from the Lower Cretaceous Haoling Formation in the Ruyang basin.Based on analysis of the following macro and micro characteristics,these eggshells can be assigned toElongatoolithus(Elongatoolithidae):dispersituberculate or linearituberculate ornamentation;two-layer eggshell structure that consists of a cone layer and a columnar layer from the bottom to top;cone layer composed of closely arranged cones;undulating parallel accretion line in the columnar layer.This discovery marks the first record ofElongatoolithusin the stratum of Early Cretaceous,which expands the geohistorical and geographical distribution of this oogenus.According to the previously known fossil connections,these eggshells may be related to the oviraptorrosaurs in the stratum such asLuoyanggia liudianensis,indicating a suitable living and breed environment for these dinosaurs at the late stage of Early Cretaceous in Ruyang basin.

关 键 词：汝阳盆地 下白垩统 郝岭组 恐龙蛋 长形蛋属 

分 类 号：Q915[天文地球—古生物学与地层学] P534.53[生物学—古生物学]