世界小异长足虻属昆虫在世界区划中区系分析

The Faunal Analysis of Chrysotus Insects from World in Zoogeographic Regions in the World

通过对世界小异长足虻属昆虫461种进行区系分析,由此发现:小异长足虻属昆虫在世界动物地理区划中有14种分布型,以东洋界为主,其次为新热带界;且各区特有种类多,跨界分布种类很少,各区相似性系数均低于0.5,均存在实质性差异。说明了该属昆虫分布地狭窄,在各大动物地理界之间交流贫乏。

This paper has analyzed the faunal structure of 461 species of Chrysotus （Diptera ？ Dolichop-odidae） known from World. The results showed that the Chrysotus insects constituted 14 distribution types in zoogeographic regions in the world, in which Oriental species made up the majority of Chrysotus from world, and Neotropical is the secend. But most of them are endemic species, and few species are straddle the zoogeographic regions in the world. All the similarity coefficients are less than 0. 5 , and all of them have substantial differentence. It is clear that the distribution regions of the genus insects are nar-row, and the international of among every zoogeographic regions is poor.