摘要：

在内蒙古自治区白彦花车站附近分布的20余个坑塘和1个较大的湖泊中，生活着大量的叶肢介。对该地区叶肢介的生活习性（游动、觅食、交配等）和生存环境（坑塘的大小、水温、水体的pH值和气温）进行的调查显示：叶肢介一般活动在浅水水域，如坑塘和湖泊边缘的浅水地带；他们的游动非常缓慢，大约1cm/s；当他们交配时就停留在某处，雄性用附肢拨动含有其精子的水流，使其流向雌性的壳内（即雌性壳体与软体之间），以使卵子受精。这些事实表明，叶肢介只能适应于静水或弱流水环境。叶肢介的现代环境与古环境的对比研究显示两者是非常相似的，因此，现生叶肢介生态和环境的研究对恢复他们的古生态与古环境具有重要的意义。

Abstract:

In the vicinity of Baiyanhua Railway Station of Inner Mongolia Autonomous Region，there are over 20 pools and one large lake where a great many of conchostracans are living. The author has made investigation on the conchostracans habits including swimming，feeding，copulative way，etc. and their living environment including the pool size，water temperature，water pH and air temperature. The conchostracans commonly live in shallow waters,such as the shallow water areas along the  margins of the pools and lake，and they swim slowly(about 1 cm/s). During copulating，they stop in some place. The male moves water containing his spermatozoa by his appendages and lets the water flow into the females two valves(namely between its body and two valves). As a result, the female ova are fertilized. These facts indicate that they adapt only to quiet water or an environment in which water flows sluggishly. Comparison of both the modern environment and the palaeoenvironment of conchostracans shows that the two environments are very similar to each other. Therefore，the investigation of living conchostracans ecology and environment is of important significance for palaeoecological and palaeoenvironmental reconstruction.