我国首次发现淡水纽虫

THE FRESHWATER NEMARTEAM FIRST DISCOVERED IN HENAN CHINA

纽形动物Nemertini,约550钟。十九世纪未由德人(O.Burger)著的《那不勒斯湾纽虫》一书奠定本门基础。纽形动物是个小门,但在动物的进化中是个重要环节。纽虫很似涡虫,可是已有了血管和肛门,也就是说在整个动物界中,首先出现了完整的消化系统;首先出现了封闭式循环系统;及有成对的肠盲囊和生殖腺的排列,开始有了分节趋向。

The freshwater nemarteam Prostoma is first discovered in the water plants which grows in the Weihe River of Jix-ian Henan,China(35°22'N).The aquatic worm is orange colour and cephalic gooves hetween the first and secondcouple of eyes and resemble the P.grandis(Ikeda),but its length is only half of its(6—12mm)