陕西南部寒武系底部棘盔状化石再研究  

A RE-STUDY ON THE HELMET-LIKE FOSSILS FROM THE BASAL CAMBRIAN OF SOUTHERN SHAANXI,CHINA

作　　者：刘云焕[1,2] 李勇[1] 邵铁全[1] 胡厚攀[1] 白佳[1] 段少帅[1] 

机构地区：[1]长安大学地球科学与国土资源学院,西安710054 [2]现代古生物学与地层学国家重点实验室,南京210008

出　　处：《微体古生物学报》2013年第3期318-322,共5页Acta Micropalaeontologica Sinica

基　　金：国家自然科学基金(No.41072012);中央高校基金项目(CHD2012ZD017);中国科学院南京地质古生物研究所现代古生物学与地层学国家重点实验室课题(No.113115);西部矿产资源与地质工程教育部重点实验室;长安大学第8届"挑战杯"大学生课外学术科技作品组委会资助

摘　　要：对我国陕南下寒武统底部宽川铺段含磷岩系中棘盔状化石的具刺变态骨Amoebinella echinata的属征进行了补充修改,并对其分类位置和亲缘关系做了探讨。标本分为主支和数个分支,并具棘刺、纵纹及可能的口部等特征,其中部分棘盔类标本可能代表"固着幼虫期"或"螅状幼体期"的独立生物个体而不是动物的外部硬体。The paper described a kind of Helmet-like fossil （Amoebinella）,which was collected from the basal Cam- brian phosphoric rock of Xixiang, southern Shaanxi, China. The genus feature of Arnoebinella are supplemented and its classification and affinity are discussed. The specimens can be divided into ＂main branch＂ and several ＂sub-bran- ches＂ and there are some feature of ＂spine＂, ＂glyph＂ and ＂possible mouth＂ on the surface. Based on these features, the authors suggest that the fossils should represent ＂sedentary planula＂ or ＂primary polyp＂ rather than outer hard parts of metazoans.

关 键 词：棘盔状化石 Amoebinella “固着幼虫期”或“螅状幼体期”寒武系 西乡 陕南 

分 类 号：Q915[天文地球—古生物学与地层学]