New Fossil Xyelidae(Insecta,Hymenoptera) from the Yixian Formation of Western Liaoning,China  

作　　者：GAO Taiping ZHAO Yunyun REN Dong 

机构地区：[1]College of Life Sciences, Capital Normal University, 105 Xisanhuanbeilu, Haidian District, Beijing 100048, China

出　　处：《Acta Geologica Sinica(English Edition)》2011年第3期528-532,共5页地质学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No40872022,31071964);Nature Science Foundation of Beijing(No5082002);the PHR20090509 Project of Beijing Municipal Commission of Education

摘　　要：In this paper one new genus and two new species,Brachyoxyela brevinodia sp.nov.and Brachyoxyela gracilenta sp.nov.,in the subfamily Macroxyehnae of the family Xyelidae,are described and illustrated.The specimens were collected from the Yixian Formation,the Upper Jurassic to Lower Cretaceous,of Beipiao City,Liaoning Province,northeastern China.The new genus is established based on the characters that vein Sc meets R only beyond origin of Rs,third antennal segment is almost equal in length to the rest flagellomeres combined,terminal flagellomeres increasingly shortened toward apex,and vein 2r-rs inclined toward the apex of wing.In this paper one new genus and two new species,Brachyoxyela brevinodia sp.nov.and Brachyoxyela gracilenta sp.nov.,in the subfamily Macroxyehnae of the family Xyelidae,are described and illustrated.The specimens were collected from the Yixian Formation,the Upper Jurassic to Lower Cretaceous,of Beipiao City,Liaoning Province,northeastern China.The new genus is established based on the characters that vein Sc meets R only beyond origin of Rs,third antennal segment is almost equal in length to the rest flagellomeres combined,terminal flagellomeres increasingly shortened toward apex,and vein 2r-rs inclined toward the apex of wing.

关 键 词：Macroxyelinae new genus new species Yixian Formation China 

分 类 号：Q915.864[天文地球—古生物学与地层学] Q915.819.7[生物学—古生物学]