1. 分布在北美,古北界,印度和西北。
Distribution in north America, Palaearctic, India and the north-west Himalayas mountain.

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2. 我国古北和东洋在东部的分线应该在淮河附近。
Palearctic and Oriental Regions should be based on Huaihe River as dividing line.

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3. 粉虱蚜属为典型的东洋区成分,但在中国大陆其分布向古北有所渗透。
The aphids of Aleurodaphis are typical Oriental species; but, slightly permeated in Palaearctic on Chinese continent.

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4. 结论山西省庞泉沟自然保护区有瓣蝇类的区系特征是以古北区系成分为主。
Conclusion The Calyptratae fauna in Pangquangou Nature Reserve of Shanxi province was mostly palaearctic.

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5. 其中古北种连同古北界共同种占93.9%。表明山西省丽蝇科昆虫属于区系。
There are 93.9% of the total belonging to Palaearctic Region, which means, in Shanxi Province, most species have a Palaearctic distribution.

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6. 其中古北种连同古北界共同种占93.9%。表明山西省丽蝇科昆虫属于区系。
There are 93.9% of the total belonging to Palaearctic Region, which means, in Shanxi Province, most species have a Palaearctic distribution.

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