| Two new Jurassic stoneflies （Insecta： Plecoptera） from Daohugou,Inner Mongolia,China |
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| 作者姓名： | Yushuang Liu Dong Ren |
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| 作者单位： | College of Life Science, Capital Normal University, 105 Xisanhuanbeilu, Haidian District, Beijing 100037, China |
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| 基金项目： | National Nature Science Foundation of China
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the National Natural Science Foundation of Beijing
，
the Funding Project for Academic Human Resources Under the Jurisdiction of Beijing Municipality
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| 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.
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| 关 键 词： | 责翅目昆虫 石蝇 内蒙古 侏罗纪 |
| 收稿时间： | 28 May 2007 |
| 修稿时间： | 19 March 2008 |
Two new Jurassic stoneflies (Insecta: Plecoptera) from Daohugou, Inner Mongolia, China |
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| Yushuang Liu Dong Ren.Two new Jurassic stoneflies (Insecta: Plecoptera) from Daohugou, Inner Mongolia, China[J].Progress in Natural Science,2008,18(8):1039-1042. |
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| Authors: | Yushuang Liu Dong Ren |
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| Institution: | College of Life Science, Capital Normal University, 105 Xisanhuanbeilu, Haidian District, Beijing 100037, China |
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| Abstract: | 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 com- plex venation with many additional crossveins and branches. |
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| Keywords: | Plecoptera Taeniopterygidae Daohugou Inner Mongolia Middle Jurassic |
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