New fossil eccoptarthrids (Coleoptera: Curculionoidea) from the Yixian Formation of western Liaoning, China  

作　　者：LIU Ming REN Dong 

机构地区：[1]College of Life Science,Capital Normal University,Beijing 100037,China

出　　处：《Science China Earth Sciences》2007年第5期641-648,共8页中国科学（地球科学英文版）

基　　金：Supported by grants from the National Nature Science Foundation of China (Grant Nos. 30025006, 30370184 and 30430100);the National Nature Science Foundation of Beijing (Grant No.5032003);the Scientific Research Key Program (Grant No. KZ200410028013);the PHR Project of Beijing Municipal Commission of Education

摘　　要：One new genus and three new species of the weevil family Eccoptarthridae (Curculionoidea), Leptocar polychaetus gen. et sp. nov., Abrocar macilentus sp. nov., Cretonanophyes punctatus sp. nov., are described and illustrated. They pertain to the Upper Jurassic or Lower Cretaceous Yixian Formation of western Liaoning Province, China. The host plants to the living eccoptarthrids and the floras in Yixian Formation indicate that those archaic eccoptarthrids possibly lived on conifers with a phylogenetic closeness to Cupressaceae. Besides, the early diversification of eccoptarthrids is discussed: origi- nated in Central or East Asia in the Late Jurassic, spread into Western Europe and South America during the Early Cretaceous, underwent a dramatic decline after the Early Cretaceous which likely was caused by competitive pressure and the displacement of their host plants.One new genus and three new species of the weevil family Eccoptarthridae (Curculionoidea), Leptocar polychaetus gen. et sp. nov., Abrocar macilentus sp. nov., Cretonanophyes punctatus sp. nov., are described and illustrated. They pertain to the Upper Jurassic or Lower Cretaceous Yixian Formation of western Liaoning Province, China. The host plants to the living eccoptarthrids and the floras in Yixian Formation indicate that those archaic eccoptarthrids possibly lived on conifers with a phylogenetic closeness to Cupressaceae. Besides, the early diversification of eccoptarthrids is discussed: originated in Central or East Asia in the Late Jurassic, spread into Western Europe and South America during the Early Cretaceous, underwent a dramatic decline after the Early Cretaceous which likely was caused by competitive pressure and the displacement of their host plants.

关 键 词：FOSSIL WEEVIL Eccoptarthridae NEW TAXA Late Jurassic Early Cretaceous YIXIAN Formation Liaoning 

分 类 号：Q915[天文地球—古生物学与地层学]