Faunistic Study on Trichoptera of Yunnan

Up to now, 321 species in 77 genera of 24 families of Trichoptera have been found in Yunnan province, of which 152 species are endemic to Yunnan. The Oriental distribution is the most predominant component, 83% of the total species are fall in this pattern. Next, is the component of oriental/east palearctic distribution which contains 9% of the total species. Of the total species in Chinese zoological Regions, 44% are found only in south west region, 21% are found in southern China, and 9% are found in both two regions. Yunnan Trichoptera fauna shows the closest relationship with the fauna of Sichuan than with other adjacent provinces, with 55 species in common. Next is Yunnan Tibet (31 species in common) and Yunnan Fujian (30 species in common). In comparison of the fauna to Oriental country south to China, India and Burma have the closest relationship than other countries, with 29 species and 17 species in common, respectively. In the relationship to East Palearctic countries north to China, Yunnan Japan and Yunnan Korea have close relationships, with 15 species and 13 species in common, respectively. Species composition and abundant are quite different in different river systems: Jinsha Jiang has the most species diversity (135 species), with Lancang Jiang (97 species) and Yuan Jiang (89 species) diversity also high. Analysis of river fauna similarity shows that the fauna of same river system possess higher Dice Similarity Coefficient than that between different river system. Comparison amongAquatic Insect Ecoregions and Agriculture Forest Ecoregions of Yunnan are explored.