鱼蛉亚科昆虫特有区系与间断分布格局形成机制的研究

项目名称： 鱼蛉亚科昆虫特有区系与间断分布格局形成机制的研究

项目编号： No.41271063

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 刘星月

作者单位： 中国农业大学

项目金额： 75万元

中文摘要： 鱼蛉亚科隶属于昆虫纲广翅目齿蛉科，是最古老的完全变态类昆虫之一，占据尤为关键的系统地位。该类群远距离扩散能力弱，属种分化易受地理隔离的影响，是理想的分支生物地理学研究材料。该亚科现代区系在世界不同动物地理区内具有明显的异质性，且地理分布间断隔离，而有关该亚科现代区系演化与地理分布格局的形成至今没有明确的诠释。本项目针对鱼蛉亚科全面取样，结合形态和分子数据，重建客观清晰的鱼蛉亚科系统发育框架，利用分子钟估算主要支系的分歧时间，并结合地理分布信息，运用分支生物地理学研究手段，在时间和空间两个层面解析该亚科特有区系的演化及间断分布格局的形成机制，以期阐明该类群的进化历史。本项目可为昆虫起源演化、生物地理区划划分等研究提供新的科学例证，同时在鱼蛉亚科生物多样性保护与可持续利用等方面具有重要的实践价值。

中文关键词： 鱼蛉亚科；比较形态学；分子系统学；生物地理学；分布格局

英文摘要： The subfamily Chauliodinae (fishflies) belong to the family Corydalidae of the insect order Megaloptera, which is considered to be one of the most primitive Holometabolous insects and possesses rather significant systematic status. Because of the poor capacity of long-distance dispersal, the generic divergence and speciation of fishflies are prone to be affected by some geographical vicariance. Therefore, fishflies are a kind of good materials for the study of cladistic biogeography. Currently, the faunal component and diversity are considerably different among main zoogeographical regions, and the distributed patterns are apparently disjunctive. However, the evolution of modern fauna and formation of geographical distributed patterns of fishflies are poorly known. The present project aims to reconstruct a robust phylogenetic framework of fishflies combining morphological and molecular data from a comprehensive sampling and to reveal the evolution of endemic fauna and formation of disjunctive distribution by using molecular clock and cladistic biogeographical approaches in order to explain the evolutionary history of fishflies. This project will provide new evidence for the origin and evolution of insects, the faunal division, etc., and will play important role in the biodiversity conservation and sustainable ex

英文关键词： Chauliodinae；comparative morphology；molecular systematics；biogeography；distribution pattern