陕南早寒武世早期磷酸盐化Punctatus发育模式研究  

STUDY ON THE DEVELOPMENTAL MODEL OF PHOSPHATIZED PUNCTATUS FROM THE EARLIEST CAMBRIAN OF SOUTH SHAANXI

作　　者：刘云焕[1,2] 邵铁全[1] 韩健[2] 房启飞[1] 冯健雪[1] 郑曦[1] 

机构地区：[1]长安大学地球科学与资源学院,国土资源部成矿作用及其动力学重点实验室,西安710054 [2]西北大学,西安710069

出　　处：《微体古生物学报》2009年第3期243-248,共6页Acta Micropalaeontologica Sinica

基　　金：国家重点基础研究发展计划项目(2003CB214602-02);国家自然科学基金项目(40602003)提供资助和支持

摘　　要：在陕南宁强宽川铺地区早寒武世早期灯影组宽川铺段地层中发现了数十枚呈三维立体精美保存的磷酸盐化Punctatus动物化石,包括花冠状口部,5辐射锥体及不同发育阶段的胚胎化石标本和2枚罕见的完整Punctatus化石。研究表明,这些胚胎标本中的部分类型与Punctatus有关,通过对这些Punctatus及与Punctatus有关的胚胎化石认真观察,对Punctatus的生长方式和发育模式进行了研究,提出两极生长发育模式。腔肠动物的出现标志着真后生动物的开始,所以腔肠动物一直在生物起源与演化研究方面占据显要地位,上述研究为"化石胚胎学"这一新的研究领域增添了新内容。In this paper we describe some 3D-preserved phosphatized fossils including corolliform mouthpart, 5-radieal cone of Punctatus and embryo fossils which were recovered from the Kuanehuanpu Member of the Dengying Formation in South Shaanxi, China. On the basis of more than 10 thousand globular fossils studied, some embryo fossils related to Punctatus are found. By systematically studying on these embryos, the authors put forward ＂a development model of the two-poles growth type＂ for Punctatus. The appearance of coelenterates marks the real beginning of metazoan evolution. Therefore the study of coelenterates has the prominent position in the origin and evolutionary history of organisms. The research provides some new information for the study of fossil embryology.

关 键 词：PUNCTATUS 发育模式 化石胚胎学 灯影组宽川铺段 早寒武世 陕西宁强 

分 类 号：Q915[天文地球—古生物学与地层学]