腔肠动物起源及其研究进展  

ORIGIN AND RESEARCH PROGRESS OF THE COELENTERATE

作　　者：王妍[1] 王相人[1] 张志飞[1] 

机构地区：[1]西北大学地质学系早期生命研究所及大陆动力学国家重点实验室,陕西西安710069

出　　处：《甘肃地质》2010年第1期38-42,共5页Gansu Geology

基　　金：西北大学大陆动力学国家重点实验室科技部专项基金;国家自然科学基金项目(40702005;40602003;40332016);国家基础发展规划项目(973)(2006CB806401)

摘　　要：现生双胚层动物绝大多数为海生生物,极少数生活在淡水中。然而,双胚层动物化石类型无一例外的发现于海洋沉积物中。尽管寒武纪以后地层中保存的双胚层动物化石多数为骨骼建造,但前寒武纪—寒武纪界限附近缺乏骨骼构造的腔肠动物也一样能保存为化石。在生物演化历史的长河中,多孔动物仅仅是一个侧枝,腔肠动物是真正后生动物的开始,因此探索以腔肠动物为代表的双胚层动物的起源是非常有意义的。本文拟对这几年来对双胚层动物起源的研究状况及进展做一全面总结。Most living diploblasts are marine animals, and scarcely live in fresh water. Nonetheless, the fossil diploblasts are ordinarily found in ocean sediments. Although the most diploblast fossils preserved in post-Cambrian are skeleton building, non-skeletal coelenterates could also be seen as fossils during the PrecambrianCambrian boundary deposits. In biological evolution history, porous （sponge） animal is only a collateral. Meanwhile, coelenterate, representing the onset of eumetazoa, played a key important role in the origin and evolution history of organisms. Therefore, it is prerequisite to study the body plan of coelenterate and their early diversification for our understanding the origin of the eumetazoan.

关 键 词：双胚层动物 腔肠动物 起源 前寒武纪 早寒武世 

分 类 号：Q951[生物学—动物学]