Two new Jurassic stoneflies (Insecta: Plecoptera) from Daohugou, Inner Mongolia, China  

作　　者：Yushuang Liu Dong Ren 

机构地区：[1]College of Life Science, Capital Normal University, 105 Xisanhuanbeilu, Haidian District, Beijing 100037, China

出　　处：《Progress in Natural Science:Materials International》2008年第8期1039-1042,共4页自然科学进展·国际材料（英文版）

基　　金：National Nature ScienceFoundation of China (Grant No. 30430100);the NationalNatural Science Foundation of Beijing (Grant No.5082002);the Funding Project for Academic HumanResources Under the Jurisdiction of Beijing Municipality.

摘　　要：Two new genera and two new species of family Taeniopterygidae, Mengitaenioptera multiramis gen. et sp. nov. and Noviramonemoura trinervis gen. et sp. nov. are described. These fossils were collected from Daohugou Village (the Middle Jurassic), Inner Mongolia, China. Hitherto, these fossil species from Daohugou are the oldest taeniopterygids. Both simple and complex venations simultaneously occurred in this group, which reveals that the early diversification of taeniopterids was well underway by the Middle Jurassic. Therefore, we prefer to adopt the Comstock's opinion that the venation of taeniopterids was derived from the simple venation of the older group (such as Palaeonemouridae) at much ancient geological time ago. Some of the descendants carried this simple venation; others evolved into complex venation with many additional crossveins and branches.Two new genera and two new species of family Taeniopterygidae, Mengitaenioptera multiramis gen. et sp. nov. and Noviramonemoura trinervis gen. et sp. nov. are described. These fossils were collected from Daohugou Village （the Middle Jurassic）, Inner Mongolia, China. Hitherto, these fossil species from Daohugou are the oldest taeniopterygids. Both simple and complex venations simultaneously occurred in this group, which reveals that the early diversification of taeniopterids was well underway by the Middle Jurassic. Therefore, we prefer to adopt the Comstock＇s opinion that the venation of taeniopterids was derived from the simple venation of the older group （such as Palaeonemouridae） at much ancient geological time ago. Some of the descendants carried this simple venation; others evolved into complex venation with many additional crossveins and branches.

关 键 词：PLECOPTERA Taeniopterygidae DAOHUGOU Inner Mongolia Middle Jurassic 

分 类 号：Q969[生物学—昆虫学]