东南亚有2种人体血吸虫,即日本血吸虫和湄公血吸虫。湄公血吸虫的自然感染的中间宿主是开放拟钉螺(Tricula aperta)γ宗。戴维斯在1979年根据拟钉螺亚科的主要特征把拟钉螺亚科分成3个族,即拟钉螺族(Triculini)、Julioniini和Lacunopsini。拟钉螺族内有2个属是医学上重要的,即拟钉螺属(Tricula)和Robertsiella属。东南亚发现的拟钉螺属包括4个种:(1)开放拟钉 There are two kinds of human schistosomes in Southeast Asia, namely Schistosoma japonicum and Mekong schistosome. The intermediate host of natural infection with Mekong schistosome is the open Tricula aperta gamma. In 1979, Davis classified the Nassinae into three subfamilies, Triculini, Julioniini, and Lacunopsini, based on the main characteristics of the subfamily Nautilus. There are 2 genera within the snail family that are medically important, namely the genus Tricula and Robertsiella. There are four species of snails found in Southeast Asia: (1) open to be nails