象蜡蝉可危害多种草本作物，传播植物病毒病，也有望用于防控入侵物种，具有重要的经济意义。该科世界性分布、物种多样性丰富、特有种类众多、区系特征显著，在蜡蝉总科系统演化中占有重要地位。然而，其单系性、高级阶元分类及其系统发育关系等诸多问题尚未得到充分解答。申请人具备良好的工作基础和优势积累，在完成东洋界全部属的分类修订和部分族属系统发育研究的基础上，继续开展世界范围内象蜡蝉族属级阶元的分类订正与系统发育研究。通过整合国内和国际相关资源，结合经典分类学、比较形态学、支序系统学、几何形态学和生物地理学等工作，综合采用多种技术和研究手段，强调国际合作，对世界现生和化石象蜡蝉属及其以上阶元（族、亚科）的单系性进行检验，开展包括全部族在内的象蜡蝉科系统发育分析，根据其结果对该科高级分类系统进行修订和重建，探讨象蜡蝉的起源与演化，切实解决存在的问题，使我国象蜡蝉系统学研究保持国际领先地位。

The planthopper family Dictyopharidae, one of larger families of 28 Fulgoroidea families currently recognized, is a large, diverse, and cosmopolitan group. Historically, systematics and phylogeny of Dictyopharidae is poorly studied. Most species were described rather briefly and even not illustrated, so standard revisionary work on this group is highly needed. Few phylogenetic studies on Dictyopharidae have been undertaken, and the monophyly of the family, as well as the taxonomy of subfamilies and tribes, is uncertain. Furthermore, the systematic position of some taxa is questionable. Since 2006, a series of papers of Dictyopharidae systematics from the Oriental and eastern Palaearctic Regions have been published by the applicant and his collaborators. Our researches create an opportunity to develop some analyses on the phylogeny and biogeography of the Oriental and eastern Palaearctic Dictyopharidae. The study results provide a reference frame with which to review and investigate the phylogenetic relationships and evolution of the World Dictyopharidae. In this project, comprehensive taxonomic and phylogenetic analyses of World Dictyopharidae will be performed on the basis of the classical taxonomy, cladistics, comparative morphology, geometric morphometrics, and historical biogeography in order to revise and reclassify the family. The origin and evolution of Dictyopharidae will be discussed based on the results of phylogenetic analyses.