A New Iguanodontian Dinosaur from the Lower Cretaceous Khok Kruat Formation,Nakhon Ratchasima in Northeastern Thailand

作     者：Masateru SHIBATA Pratueng JINTASAKUL Yoichi AZUMA 

作者机构：Fukui Prefectural Dinosaur Museum51-11 TeraoMurokoKatsuyamaFukui 911-8601Japan Northeastern Research Institute of Petrified Wood and Mineral ResourcesNakhon Ratchasima Rajabhat University184 Moo 7 Suranaree SubdistictMuangNakhon Ratchasima 30000Thailand 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报（英文版）)

年 卷 期：2011年第85卷第5期

页      面：969-976页

核心收录：

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 

基　　金：the Japan-Thailand Dinosaur Project 2007-2009 which is a collaborative research project between the Fukui Prefectural Dinosaur Museum(FPDM) and the Northeastern Research Institute of Petrified Wood and Mineral Resources Nakhon Ratchasima Rajabhat University(NRRU) 

主　　题：Ratchasimasaurus iguanodontia dentary Early Cretaceous Thailand 

摘      要：Here we report a new iguanodontian dentary found from the Lower Cretaceous Khok Kruat Formation,Nakhon Ratchasima,northeast Thailand.A unique character,which is an elongated and flat shape of the dentary ramus,makes it possible to assign the specimen to the new genus of non-hadrosaurid iguanodontian,Ratchasimasaurus suranareae *** *** shows both primitive and derived characters,such as a caudally inclined coronoid process and alveolar trough with a primitive crown impression,and a derived buccal shelf between tooth row and coronoid *** discovery of a new iguanodontian from the Indochina Terrene,considering that the previously reported Probactrosaurus-like iguanodontian,points out a great diversity of this group in the late Early Cretaceous in Thailand,and corresponds to the Asian iguanodontian diversity at that time.