Dongbeititan dongi, the First Sauropod Dinosaur from the Lower Cretaceous Jehol Group of Western Liaoning Province, China
Dongbeititan dongi, the First Sauropod Dinosaur from the Lower Cretaceous Jehol Group of Western Liaoning Province, China
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DOI：
10.1111/j.1755-6724.2007.tb01013.x
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发表时间：
2007-12
期刊：
影响因子：
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通讯作者：
Wang Xu-ri;You Hailu;Qingjin Meng;Chunling Gao;Xiaodong Cheng;Jinyuan Liu
中科院分区：
文献类型：
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作者：
Wang Xu-ri;You Hailu;Qingjin Meng;Chunling Gao;Xiaodong Cheng;Jinyuan Liu
摘要：本文描述了在辽宁省北票地区下白垩统热河群发现的一个蜥脚类恐龙的部分颅后骨骼。它所拥有的一系列特征，包括其骶前成分的骆驼状内部结构，背肋近端的气腔的存在，特别是股骨近端的内侧偏转，明确地建立了标本的泰坦龙形亲缘关系。它与其他泰坦龙类的不同之处在于喙突在头尾方向上延长，其头腹端呈方形，耻骨的髋臼边缘长而光滑且略凸。比较研究表明，东北泰坦是一个基部的泰坦龙形，比Euhelopus，Fusuisaurus和Huanghetitan更衍生，但比Gobititan和Jiutaisaurus少。东北泰坦是辽西下白垩统热河群首次发现的蜥脚类恐龙。
Abstract: We herein describe a partial postcranial skeleton of a sauropod dinosaur recovered from the Lower Cretaceous Jehol Group in the Beipiao area of western Liaoning Province, northeastern China. A suite of features it possesses, including the camellate internal structure of its presacral elements, the existence of pneumatocoels on the proximal ends of the dorsal ribs, and especially the medially deflected proximal portion of the femur, definitively establish the titanosauriform affinities of the specimen. It differs from other titanosauriforms in having a craniocaudally elongate coracoid with a squared cranioventral extreme and a long, smooth, and slightly convex acetabular edge of the pubis. It represents a new taxon, Dongbeititan dongi gen. et sp. nov. Comparative studies suggest that Dongbeititan is a basal titanosauriform, more derived than Euhelopus, Fusuisaurus, and Huanghetitan, but less derived than Gobititan and Jiutaisaurus. Dongbeititan represents the first sauropod dinosaur reported from the Lower Cretaceous Jehol Group of western Liaoning Province.