作为海洋微体古生物门类之一——介形虫,在海洋学和海洋地质学的研究和应用方面都具有一定的意义。利用现代生物区系的研究成果,可从生态环境来解释古代生物区系和沉积关系,同时也作为解释古生态的基础。浮游有孔虫能很好地反映海流,水团、海水温度、盐度等各种状况。但有关海洋中介形虫的研究不多,尤其在南海尚少见。就目前我们从南海部分海区获得的资料来看,不同属、种的介形虫分布是受水深、水温及 As one of the marine micro-organisms paleontology, Ostracoda, it has certain significance in the research and application of oceanography and marine geology. Using the research results of modern biological fauna, we can explain the relationship between ancient fauna and sedimentation from the ecological environment and at the same time, it also serves as the basis for the interpretation of paleosol. Planktonic foraminifera can well reflect the current, water mass, seawater temperature, salinity and other conditions. However, there are not many studies on the melatonin in the ocean, especially in the South China Sea. At present, we have obtained some data from the South China Sea. According to the data, the distribution of ostracods in different genera and species is affected by the depth of water,