The first record of freshwater plesiosaurian from the Middle Jurassic of Gansu, NW China, with its implications to the local palaeobiogeography

作     者：Ting Gao Da-Qing Li Long-Feng Li Jing-Tao Yang 

作者机构：Institute of Vertebrate Paleontology and College of Life Science and Technology Gansu Agricultural University 

出 版 物：《Journal of Palaeogeography》 (古地理学报（英文版）)

年 卷 期：2019年第8卷第4期

页      面：360-367页

核心收录：

学科分类：0202[经济学-应用经济学] 02[经济学] 020205[经济学-产业经济学] 

基　　金：supported by the Scientific Innovative Fund of Gansu Agricultural University(Grant No.066-056001) 

主　　题：Freshwater plesiosaur Middle Jurassic Jinchang Gansu Province Palaeobiogeography 

摘      要：Plesiosaurs are one of the common groups of aquatic reptiles in the Mesozoic,which mainly lived in marine *** plesiosaurs are rare in the world,especially from the *** present paper reports the first freshwater plesiosaur,represented by four isolated teeth from the Middle Jurassic fluviolacustrine strata of Qingtujing area,Jinchang City,Gansu Province,Northwest *** teeth are considered to come from one *** comparative analysis of the corresponding relationship between the body and tooth sizes of the known freshwater plesiosaur shows that Jinchang teeth represent a small-sized *** on the adaptive radiation of plesiosaurs and the palaeobiogeographical context,we propose a scenario of a river leading to the Meso-Tethys in the Late Middle Jurassic in Jinchang area,which may have provided a channel for the seasonal migration of plesiosaurs.