Among them East Asian element predominated over the other elements, making up 51.35 percent of the total species ,then Oriental element occupying 25.51%, Palaearctic 18.45% and Eurytopic only 2.26%.

• 这些种类主要归属4种区系成分，其中东亚成分占优势，占总数的51.；35%25，东洋成分占25