中文摘要：

目的对位于中国云南省东部的早寒武世澄江化石库保存的软躯体构造的叶足动物化石进行系统研究，探究叶足动物这一灭绝类群与现生有爪类的亲缘关系。方法将叶足动物化石与现生有爪类进行形态对比分析，详细讨论它们之间可能的近裔特征，从生物演化角度系统探究两者之间的亲缘关系。结果叶足动物与现生有爪类亲缘关系相对较远。结论现生有爪类极有可能是叶足动物演化过程中的一个侧支。

英文摘要：

Aim Early Cambrian Chengjiang Lagerstatte, located in the Eastern Yunnan of China, has been regarded as a crucial window to observe the radiation of the metazoan because of the well preserved soft-bodied fossils. Methods It was discovered in 1984. Since then the paleontologists have done lots of work, and they found that the body plan of the living Phyla had occurred and nearly all the Phyla of living animals had been discovered in Early Cambrian. Results As an extinct group, the relationships among Cambrian lobopods, Onychophora and Arthropoda have long been one of the most hotly-debated subjects. Conclusion After careful observation of Cambrian lobopods, especially on the morphology of Early Cambrian lobopods of Chengjiang Fossil Lagerstatte, the relationship between Cambrian lobopods and Onychophora systematically was restudied and regarded that Cambrian lobopods bear some relationship with Onychophora, Onychophora are most likely one of the stem group of Cambrian lobopods.