本项目拟以我国关键地区侏罗纪和白垩纪陆相完整连续地层剖面和多样性丰富的叶肢介化石连续记录为基础平台，结合我国近年来晚中生代地层高精度大量测年数据，参考磁性地层学和化学地层学最新研究进展，以扫描电镜为基本研究手段，以期在进一步充分完善我国晚中生代陆相高精度岩石地层和生物地层学格架基础上，详细系统划分侏罗纪和白垩纪叶肢介动物群的演化阶段，捕捉化石叶肢介重要演化事件。发挥我国化石叶肢介分类学在国际学术界的研究优势，选取叶肢介壳体作为主体研究对象，将化石叶肢介分类学研究方法应用到现生叶肢介分类学研究中，同时综合现生叶肢介最新研究进展，以期达成建立化石和现生叶肢介统一的系统分类依据，提取叶肢介壳体个体发育和系统发生信息，利用重演律探索现生和化石叶肢介的系统演化关系。并尝试分支分类学研究方法，以期达成化石和现生叶肢介统一分类的研究目标，从而解决化石和现生叶肢介分类系统长期割裂无法统一的关键科学问题。

Based on the well-developed, complete and continuous non-marine Jurassic and Cretaceous stratigraphic sequences in the key areas of China, and the abundant and diverse fossil clam shrimp faunal records, this project combines with a large number of recently achieved high precision dating data from the non-marine Jurassic and Cretaceous strata. The project applicants will refer to the latest research progresses in the magnetostratigraphy and chemostratigraphy, and take the scanning electron microscopy as the basic research method. On the basis of fully perfected Jurassic and Cretaceous continental high-precision lithostratigraphic and biostratigraphic framework in China, the evolutionary stages of Jurassic and Cretaceous clam shrimps will be systematically classified, and their important evolutionary events will be captured. Taking the research advantages of Chinese fossil clam shrimp taxonomy in the international academic circles, the project applicants will select the clam shrimp carapaces as the main investigated subjects, and apply the research method of the fossil clam shrimp systematics to the taxonomic study of living clam shrimps. In order to establish the common systematic taxonomic classification criteria for both fossil and extant clam shrimps, the phylogenetic information of clam shrimps is extracted, and the phylogenetic relationship between living and fossil clam shrimps is reconstructed by using the law of recapitulation. In order to achieve a unified taxonomy for fossil and extant clam shrimps, a cladistic systematic research method will be used. Thus, the key scientific problem of long-term separation of fossil and extant clam shrimp systematics can be solved.