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A New Troodontid Dinosaur from the Lower Cretaceous Yixian Formation of Liaoning Province, China
投稿时间:2016-06-29  修订日期:2017-03-10  点此下载全文
引用本文:SHEN Caizhi,LÜ Junchang,LIU Sizhao,Martin KUNDRÁT,Stephen L. BRUSATTE,GAO Hailong.2017.A New Troodontid Dinosaur from the Lower Cretaceous Yixian Formation of Liaoning Province, China[J].ACTA GEOLOGICA SINICA(English edition),91(3):763~780
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作者单位E-mail
SHEN Caizhi 1 Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China 2 Dalian Natural History Museum, Dalian, Liaoning 116023, China shencaizhi00@163.com 
LÜ Junchang 1 Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China  
LIU Sizhao 2 Dalian Natural History Museum, Dalian, Liaoning 116023, China  
Martin KUNDRÁT 3 Department of Ecology, Faculty of Natural Sciences, Comenius University, Bratislava, Slovak Republic 4 Center for Interdisciplinary Biosciences, Faculty of Science, University of Pavol Jozef ?afárik, Ko?ice, Slovak Republic  
Stephen L. BRUSATTE 5 University of Edinburgh, School of GeoSciences, Edinburgh EH4 2BH, UK  
GAO Hailong 6 Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100037, China  
 
A New Troodontid Dinosaur from the Lower Cretaceous Yixian Formation of Liaoning Province, China
Author NameAffiliationE-mail
SHEN Caizhi 1 Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China 2 Dalian Natural History Museum, Dalian, Liaoning 116023, China shencaizhi00@163.com 
LÜ Junchang 1 Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China  
LIU Sizhao 2 Dalian Natural History Museum, Dalian, Liaoning 116023, China  
Martin KUNDRÁT 3 Department of Ecology, Faculty of Natural Sciences, Comenius University, Bratislava, Slovak Republic 4 Center for Interdisciplinary Biosciences, Faculty of Science, University of Pavol Jozef ?afárik, Ko?ice, Slovak Republic  
Stephen L. BRUSATTE 5 University of Edinburgh, School of GeoSciences, Edinburgh EH4 2BH, UK  
GAO Hailong 6 Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100037, China  
Abstract:A new troodontid dinosaur, Daliansaurus liaoningensis gen. et sp. nov., is erected based on a nearly complete specimen from the Lower Cretaceous Yixian Formation of Beipiao City, Liaoning Province, China. This well preserved skeleton provides important new details of the anatomy for Liaoning troodontids, and gives new insight into their phylogenetic relationships and evolution. Daliansaurus is distinguished from other troodontids by an enlarged ungual on pedal digit IV, which is approximately the same size as the sickle-shaped second ungual, and is differentiated from other Liaoning troodontids by a number of characters of the skull, manus, pelvis, and hindlimb. A phylogenetic analysis recovers Daliansaurus within a subclade of Liaoning troodontids that also includes Sinovenator, Sinusonasus, and Mei. We erect a name for this group—Sinovenatorinae—and argue that it reflects a localized radiation of small-bodied troodontids in the Early Cretaceous of eastern Asia, similar to previously recognized radiations of Liaoning dromaeosaurids and avialans. As more Liaoning theropods are discovered, it is becoming apparent that small, feathered paravians were particularly diverse during the Early Cretaceous, and future work is needed to clarify how this diversity arose, which species coexisted, and how these numerous species partitioned niches.
keywords:Troodontids, Daliansaurus liaoningensis, Early Cretaceous, Yixian Formation, Liaoning
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