淅川盆地上白垩统蜥脚类幼年个体新材料  

NEW MATERIAL OF JUVENILE SAUROPOD FROM THE UPPER CRETACEOUS OF THE XICHUAN BASIN

作　　者：莫进尤 谭庆伟 胡永国 谭琳 徐星[4] MO Jin-you;TAN Qing-wei;HU Yong-guo;TAN Lin;XU Xing(Natural History Musuem of Gziangxi, Nanning 530012, China;Long Hao Institute of Geology and Paleontology, Hohhot 010010, China;Yunxian Dinosaur Eggs National Geological Park , Yunxian 442500, China;Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences , Institute of Vertebrate Paleontology and Paleoanthropology , Chinese Academy of Sciences , Beijing 100044, China)

机构地区：[1]广西自然博物馆,南宁530012 [2]内蒙古龙昊地质古生物研究所,呼和浩特010010 [3]湖北郧县恐龙蛋国家地质公园,郧县442500 [4]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：《古生物学报》2018年第4期504-512,共9页Acta Palaeontologica Sinica

基　　金：国家自然科学基金(批准号:41120124002);内蒙古自治区国土资源厅专项资金资助.

摘　　要：描述湖北郧县淅川盆地晚白垩世地层中产出的蜥脚类恐龙化石。标本保存于上白垩统马家村组中段灰绿色含钙泥质粉砂岩中,材料包括牙齿、脊椎和肢骨化石等。从愈合特征(如分离的椎体和椎弓)分析,这些化石至少由2个未成年个体组成。这些化石体现出的特征组合,如股骨近端外侧突出,近端外缘向内侧倾斜,荐前椎气腔构造发育,以及牙齿呈细长的棒状,表明湖北郧县马家村组地层发现的蜥脚类可归入巨龙形类中的多孔椎龙类或者更进步的类群。新材料的发现对于进一步了解中国乃至东亚地区白垩纪晚期的蜥脚类恐龙分布和演化具有一定的意义。New sauropod material was collected from the Upper Cretaceous Majiacun Formation of the Xichuan Basin,Yunxian County,Hubei Province, central China,including two nearly complete teeth,a number of vertebrae,and some limb bones,which are derived from at least two individuals.The separate preservations of all centra and neural arches suggest that the specimens are features,such from juvenile as proximal shaft deflected medially, individuals.Several one-third of femoral cervical and dorsal vertebrates composed of spongy bone,and very slender peglike teeth,suggest that these specimens are referable to the Somphospondyli or more exclusive clade within the Titanosauriformes.The new discovery provides further evidence for the dominance of the Titanosauriformes in eastern Asia during the Late Cretaceous.

关 键 词：蜥脚类 马家村组 淅川盆地 郧县 湖北 

分 类 号：Q915[天文地球—古生物学与地层学]