舌鞘目化石在中国陕西首次发现(昆虫纲)

Discovery of the fossil glosselytrods (Insecta: Glosselytrodea) from Shaanxi, China

在世界上发现的舌鞘目化石很稀少,已知仅6科、12属、26种。本文记述了中三叠世舌鞘目昆虫的3个新属种,系铜川昆虫组合的新成员(也是陕西生物群的一种类别)。根据铜川组舌鞘化石和其他昆虫以及动、植物化石的研究结果,铜川组的时代相当于欧洲中三叠世的拉丁尼期(或阶)。根据舌鞘目和其他昆虫化石的性质,作者提出冈瓦纳大陆与欧亚大陆裂离时代可能提前到中三叠世之前完成。

The discovered fossil glosselytrods in the world are rare, which have been known with only 6 families, 12 genera and 26 species. In this paper the author described three new Midtriassic fossil glosse lytrods belonging to the new members of Tongchuan Entonmassemblage of Shaanxi Entomofauna （ one fossil group of Shaanxi Biota）. Judged on the resuhs of study on the fossils of glosselytrods and other insects, other animals and plants, the geological age of the Tongchuan Formation corresponded to European Latinian stage in age. Based on the characteristics of these insects and other fossils, the author inferred that the Gondwana continent might separate from the Eurasian continent before the Middle Triassic Ladinian stage. Type specimens are deposited in Beijing Museum of Natural History.