Journal of Palaeogeography     2024 13 (3):  547-562    ISSN: 2095-3836  CN: 10-1041/P Discovery of the choristodere Hyphalosaurus baitaigouensis from the Lower Cretaceous Jiufotang Formation of western Liaoning, China and its paleobiogeographic significance Li-Jun Zhanga,*, Shu-An Jib, Hai-Chun Zhangc aSouth China Sea Culture Museum, Hainan Tropical Ocean University, Sanya 572022, Hainan Province, China; bKey Laboratory of Stratigraphy and Paleontology, Ministry of Natural Resources; Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China; cState Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing 210008, Jiangsu Province, China Received: 2023-11-02  Revised: 2023-12-19  Online: null Supporting info null