| In order to reveal the species diversity and distribution feature of Spilomelinae in Qin-Ba Mountains Region, Nanling Mountains Region and Hengduan Mountains Region, the systematical investigation and identification of Spilomelinae species in these three mountain regions was conducted in this study, the distribution information of each species were collected, and multivariate similarity analysis method was used to analyze the distribution of Spilomelinae and their host plants. The results are as follows. There were 132 species in 47 genera in Qin-Ba Mountains Region, 241 species in 86 genera in Nanling Mountains Region, and 259 species in 89 genera in Hengduan Mountains Region. In addition, the most abundant species in Hengduan Mountains Region, Nanling Mountains Region and Qin-Ba Mountains Region were, respectively, in Xishuangbanna and Wuliang Mountains, Nanling Mountains and North Guangxi Mountains and Daba Mountains. It indicated that the lower the latitude, the higher the species richness. The results of multivariate similarity clustering showed that the three regions were divided into six geographical unit groups: ((Southern Nanling Mountains + Hengduan Mountains) + transition area of Southern and Northern Nanling Mountains) + (Northern Nanling Mountains + (Qinling Mountains + Daba Mountains)). Among them, Spilomelinae in Southern Nanling Mountains and Hengduan Mountains had the highest species richness and had many unique species, showing an 6obvious pan-tropical distribution; the species similarity in the transition area of Southern and Northern Nanling Mountains was closer to that of Southern Nanling Mountains and Hengduan Mountains. The species similarity in Daba Mountains, Qinling Mountains and Northern Nanling Mountains was higher. A total of 47 families and 141 genera of host plants, mainly pantropical vegetation groups, were obtained from the three mountain regions. According to the multivariate similarity clustering results of host plants, the three regions were divided into 4 geographical unit groups: ((Southern Nanling Mountains + Hengduan Mountains) + Northern Nanling Mountains) + (Qinling Mountains + (Daba Mountains+ Ganzi Mountains)). Overall, the multiple similarity clustering of Spilomelinae and their host plants in the three mountain regions were similar, which corresponded to the types of different climatic zones in China, indicating that the Spilomelinae had certain tropical feature. |
