A Titanosaurian Sauropod Dinosaur with Opisthocoelous Caudal Vertebrae from the Early Late Cretaceous of Liaoning Province, China |
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| Authors: | YOU Hailu JI Qiang Matthew C LAMANNA LI Jinglu and LI Yinxian Institute of Geology Chinese Academy of Geological Sciences Baiwanzhuang Roa Beijing Chin |
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| Institution: | YOU Hailu,JI Qiang,Matthew C. LAMANNA,LI Jinglu and LI Yinxian Institute of Geology,Chinese Academy of Geological Sciences,Baiwanzhuang Roa,Beijing,Chin,Department of Earth and Environmental Science,University of Pennsylvani,South rdStreet,Philadelphi,PA,USA Liaoning Paleontological Museum,Beipiao,Liaoning,China |
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| Abstract: | 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. |
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| Keywords: | Dinosauria Sauropoda Titanosauria Opisthocoelicaudiinae Sunjiawan Formation early Late Cretaceous Liaoning China |
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