Three flora assemblages of Yima formation, in western Henan are systematically studied. The beginning time from which the climate in this region during the middle Jurassic and the late Jurassic period getting hot was ...Three flora assemblages of Yima formation, in western Henan are systematically studied. The beginning time from which the climate in this region during the middle Jurassic and the late Jurassic period getting hot was Bajocian to early Bathonian,obviously earlier than in south Europe, middle Asia,and Siberia.展开更多
The Axymyiidae is one of the small families of the suborder Nematocera within the Diptera. Up to date, three genera and seven species of extant axymyiids have been described from the Holarctic Region, including Canada...The Axymyiidae is one of the small families of the suborder Nematocera within the Diptera. Up to date, three genera and seven species of extant axymyiids have been described from the Holarctic Region, including Canada, China, Hungary, Japan, Russia, and USA, with three genera and three species of fossil taxa described from the Middle Jurassic of Daohugou, northeastern China. A new genus Raraxymyia gen. nov. and two new species, R. parallela and R. proxima gen. et sp. nov. from the Middle Jurassic Jiulongshan Formation of Daohugou Village, Inner Mongolia, China, are herein described based on their well-preserved wings and body characters. A revised key to the genera of axymyiids is provided.展开更多
文摘Three flora assemblages of Yima formation, in western Henan are systematically studied. The beginning time from which the climate in this region during the middle Jurassic and the late Jurassic period getting hot was Bajocian to early Bathonian,obviously earlier than in south Europe, middle Asia,and Siberia.
基金supported by the National Basic Research Program of China (973 Program) (2012CB821906)the National Natural Science Foundation of China (No.31230065,41272006)+1 种基金Project of Great Wall Scholar and KEY project of Beijing Municipal Commission of Education (grants KZ201310028033)China Geological Survey (1212011120116)
文摘The Axymyiidae is one of the small families of the suborder Nematocera within the Diptera. Up to date, three genera and seven species of extant axymyiids have been described from the Holarctic Region, including Canada, China, Hungary, Japan, Russia, and USA, with three genera and three species of fossil taxa described from the Middle Jurassic of Daohugou, northeastern China. A new genus Raraxymyia gen. nov. and two new species, R. parallela and R. proxima gen. et sp. nov. from the Middle Jurassic Jiulongshan Formation of Daohugou Village, Inner Mongolia, China, are herein described based on their well-preserved wings and body characters. A revised key to the genera of axymyiids is provided.
