Lanzhousaurus magnidens gen. et sp. nov. from Gansu Province,China:the largest-toothed herbivorous dinosaur in the world

YOU Hailu1,JI Qiang1,LI Daqing2 1G Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China; 2G Fossil Research and Development Center of the Third Geology and Mineral Resources Exploration Academy of Gansu Province, Lanzhou 730050,Gansu,China  

A new ornithopod dinosaur,Lanzhousaurus magnidens gen. et sp. nov.,from the Early Cretaceous of the Lanzhou Basin, Gansu Province,China,possesses the largest teeth of any herbivorous dinosaur yet discovered. The dental morphology of Lanz- housaurus,in which only 14,～4 cm- wide tooth families are preserved in the tooth row of the 1 m long lower jaw,augments the known morphological diversity of dinosaurs. Cladistic analysis recovers a close relationship between L. magnidens and Lurdusaurus are- natus from the Early Cretaceous of Africa. Together,these species represent a previously unrecognized,massively- constructed quadrupedal lineage in the evolution of ornithopod dinosaurs. This discovery also implies a close connection between Eurasia and Africa during the Early Cretaceous.

【Key Words】： dinosaur ornithopod dinosaur teeth Early Cretaceous Lanzhou Basin Gansu China
【Fund】： This work is supported by funds from China Geological Survey the Ministry of Land and Resources of P. R. China toJi Q and You H L and from the Gansu Geology and Mineral Resources Bureau to Li D Q.
【CateGory Index】： Q915.2
【DOI】： CNKI:SUN:ZQYD.0.2005-09-001

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