A Titanosaurian Sauropod Dinosaur with Opisthocoelous Caudal Vertebrae from the Early Late Cretaceous of Liaoning Province, China  

作　　者：YOUHailu JIQiang MatthewC.LAMANNA LIJinglu LIYinxian 

机构地区：[1]LiaoningPaleontologicalMuseum,Beipiao,Liaoning122100,China [2]InstituteofGeology,ChineseAcademyofGeologicalSciences,BaiwanzhuangRoad26,Beijing100037,China [3]DepartmentofEarthandEnvironmentalScience,UniversityofPennsylvania,240South33rdStreet,Philadelphia,PA19104,USA

出　　处：《Acta Geologica Sinica(English Edition)》2004年第4期907-911,共5页地质学报（英文版）

摘　　要：We describe a new titanosaurian sauropod dinosaur, Borealosaurus wimani gen. et sp. nov., based on a distinctive mid-distal caudal vertebra from the early Late Cretaceous Sunjiawan Formation exposed in the Shuangmiao village of Beipiao in Liaoning, China. We provisionally refer an isolated tooth crown, a middle caudal vertebra, and a right humerus from the same locality and horizon to this taxon. Borealosaurus is distinguished from other sauropods in its possession of opisthocoelous mid-distal caudal vertebrae. The occurrence of opisthocoelous caudals in Borealosaurus and the Mongolian sauropod Opisthocoelicaudia raises the possibility that these taxa pertain to an as-yet unrecognized titanosaurian subclade endemic to the Cretaceous Asia.We describe a new titanosaurian sauropod dinosaur, Borealosaurus wimani gen. et sp. nov., based on a distinctive mid-distal caudal vertebra from the early Late Cretaceous Sunjiawan Formation exposed in the Shuangmiao village of Beipiao in Liaoning, China. We provisionally refer an isolated tooth crown, a middle caudal vertebra, and a right humerus from the same locality and horizon to this taxon. Borealosaurus is distinguished from other sauropods in its possession of opisthocoelous mid-distal caudal vertebrae. The occurrence of opisthocoelous caudals in Borealosaurus and the Mongolian sauropod Opisthocoelicaudia raises the possibility that these taxa pertain to an as-yet unrecognized titanosaurian subclade endemic to the Cretaceous Asia.

关 键 词：DINOSAURIA SAUROPODA TITANOSAURIA Opisthocoelicaudiinae Sunjiawan Formation early Late Cretaceous Liaoning China 

分 类 号：Q915.6[天文地球—古生物学与地层学] P534.53[生物学—古生物学]