The Species Diversity Of Thysanoptera In Beijing And Its Around Areas

Thrips, is the common name of Thysanoptera insects, which is a group of minute insects in Class Insecta.There are more than 7400 known species in about 1000 known genera worldwide; only about 487 species are reported in China. Thrips are propitious to our human, and considered as important insects with economic significance, such as delivering pollen, weeding grass, predatoring on other minute insects, and so on. On the other hand, most thrips species disserve the economic and ornamental plants, and transmit plant viruses.These species are well-known agricultural and forest pests, for example Stenchaetothrips biformis (Bagnall), Thrips tabaci Lindeman, Dendrothrips ornatus (Jablonowsli), and so on. Because the minute thrips frequently hide in the flowers or leavers of plants, and damage these parts, people often pay attention to the later period of damage and overlook the early effect, which causing significant economic losses. Thrips are also an important part of the biodiversity in the world. So the research of thrips is the necessary to the world's biodiversity research and must bring us potential economic values.Beijing and its around areas are comprised of Beijing City, Tianjin City and Hebei Province, between 36°03'～42°40'N and 113°27'～119°50'E. These areas are broad, about 2.27% in China. The landforms on these areas are with many differences. In the north and west are Mountains. In the south and east is Hebei Plain. There are five rivers over these areas. Therefore the types of the vegetation and the climate are various. And, these area are also on the border of the Palaearctic and the Oriental. Because of lack of distinct obstructs, the species of the Palaearctic or the Oriental in these areas can infiltrate into each other and the vegetation types are rich, there are very complicated and special fauna of thrips in these areas. In the general part, the research history of thrips and biodiversity were outlined. The comparative morphology was summarized and the thrips biology was introduced, including reproduction, growth and development, feeding habits, migration and diffusion. Based on the specimen records, literatures and GIS techniques, thrips's geographical distribution figures are done; and species diversity of thrips in these areas are systematically studied from three following aspects, such as species component, endemic species diversity, and diversity of host plants. In the meantime, geographical distribution patterns of thrips in these areas are discussed in here.In the taxonomic part,66 species in 30 genera of 3 families from Beijing and its around areas were reviewed. About 4000 specimens were examined, deposited in the National Zoological Museum of China (NZMC), Institute of Zoology, Chinese Academy of Sciences. In this paper, keys to species, genera and families, diagnosis, host plants and distributions of families and genera are provided. To species, the following information is provided in the issue, main references cited, synonyms, geographical distribution, host plants and biology.In here, one species was described as new to science:Mycterothrips castaneus sp. nov., and three species were reported from China for the first time:Caliothrips insularis (Hood), Mycterothrips japonicas Masumoto & Okajima, and Liothrips elaeocarpi Priesner.