缟蝇科成、幼虫主要为腐食性和菌食性，对生态环境变化敏感，是陆生生境变化评价的指示生物之一；部分属的成虫可访花，有助于植物传粉；少数种类的幼虫被发现于动物尸体上，有潜在的法医昆虫应用价值。我国缟蝇亚科昆虫资源丰富，生境多样化，是世界缟蝇科区系研究的重要组成部分。缟蝇亚科世界已知132属1200余种，我国已知28属100余种。本项目拟对我国已知属、种，特别是疑难属种(存在种类归属、归亚属问题)进行系统的分类修订，发现和描记新纪录属、种；联合外部形态数据和基于28SrDNA、EF-1ɑ、16SrRNA和COI基因序列的分子数据，构建缟蝇亚科的系统发育树，探讨不同属间(特别是疑难属种)的关系，解决形态分类鉴定的难题，建立和完善中国缟蝇亚科的分类系统。该研究结果将大大丰富缟蝇科的物种多样性，为进一步探讨缟蝇亚科的单系性和缟蝇总科的分子系统学研究奠定基础，也对加强我国缟蝇科昆虫资源保护有重要的意义

Lauxaniidae is an important ecological and economic group as an indicator of the enviromental changes in ghe ecological system of land. Adults and larvae are recorded as fungal grazers and detritovores in leaf litter, decaying vegetation and birds’ nests. Some of them visit flowers and benefit to plant pollination. A few of larvae were found on the dead animals, with the potential value of forensic insects. China is one of the richest countries with generic and specific diversity and habitat diversity of Lauxaniinae (Diptera, Lauxaniidae) in the world. There are more than 1200 species 132 genera in the world and more than 100 species 28 genera in China. The aim of this project is to revise the known genera and species, especially doubtful genera and species, describe and record new genera and species; to infer the phylogeny of the subfamily Lauxaniinae and discuss the relationship of genera and subgenera by analyzing the morphological characters, the nucleotide sequences of 28SrDNA, EF-1ɑ and the mitochondrial gene sequences of 16SrRNA, COI; to solve the confusion and difficulties of morphological identification; to clarify the monophyly or paraphyly of Lauxaniinae; then to build and improve Taxonomy of Lauxaniinae. This would enhance diversity of Lauxaniidae, develop further study of phylogeny and evolution on Lauxanioidea. It is an importnant and necessary to protect and utilize the diversity of the lauxaniids in China.