摘要
Biogeography of the leaflaopper subfamily Stegelytrinae Baker is studied based on an analysis of geographical distribution of this subfamily worldwide using a cluster analysis of the zoological distribution of areas of endemism as well as the phylogeny of representatives of this subfamily. Results show that the Stegelytrinae mainly occur in the Oriental Region and in the Mediterranean area of the Palaearctic Region, and this extends to the east side of both Wallaee＇s and Weber＇s lines. Eleven areas of endemism of this subfamily are recognized. The proportions of endemic taxa in different areas of endemism are generally very high in comparison with other leaflaopper groups, but distinct differences could be found among the different areas of endemism of Stegelytrinae. This subfamily is most intensively diversified in the Indochina Peninsula （INCN）. This is the stegelytrine distribution center, having the highest biodiversity at both genetic and species levels. The dendrogram of endemic areas of Stegelytrinae constructed using cluster analysis of the zoological distribution of Stegelytrinae at generic level shows the endemic areas of Stegelytrinae can be divided into 4 large groups. Relationships among different endemic areas of Stegelytrinae correspond largely to the geologic history of related areas, which indicates that the evolution and vicariance of this subfamily have been closely related to the history of continental drift and climate changes. It is deduced that the presumed monophyletic Stegelytrinae originated in the Oriental Region after North America had separated from Eurasia; this is the case in the monophyletic genera group which is supported by the lateral frontal sutures extending dorsally well beyond the corresponding ocellus. In addition, two expanding traces of the Stegelytrinae are presumed, which remain plausible explanations for the dispersal of Stegelytrinae： （1） New Guinea （and probably （＋ Australia）） - Kalimantan - Sumatra - Malay Peninsula - Indochina Peninsula - Ce
以秀头叶蝉亚科昆虫在世界范围的地理分布为依据,结合其代表类群的系统关系及特有分布区的聚类分析结果,探讨了该亚科在不同分布区的分布格局、多样性水平、起源、演化和扩散轨迹。研究结果表明秀头叶蝉亚科主要局限分布于东洋区及古北区的地中海亚区,但向东南方向扩散至华莱士线及韦伯线以东的澳洲区北部。该亚科代表类群的系统发育关系及11个特有分布区的聚类关系表明,其各特有分布区可被分为4支,且该亚科的起源、演化、扩散与相关地区的大陆漂移、地质及气候演化历史密切相关;其中,中南半岛的分化程度(属级、种级水平)最高,应是该亚科的起源和分化中心。该亚科的分化、扩散轨迹主要呈现为2条:(1)新几内亚(或许(+澳大利亚))-加里曼丹-苏门答腊-马来半岛-中南半岛-中国中部、南部(+海南、台湾)-(中国西南部+尼泊尔+印度东北部)-(印度西北部+阿富汗东部);(2)中南半岛-中国中部、南部(+海南、台湾)-(西亚地区+地中海沿岸地区)。
基金
supported by the National Natural Science Foundation of China(30970389)
