【摘要】 对陕西宁强宽川铺地区灯影组宽川铺段原始锥石类carinachitids两个新种Emeiconularia amplicanalis sp.nov.和Carinachites platus sp.nov.进行了记述。外表形态多样、个体大小悬殊的两辐对称、三辐对称和四辐对称的carinachitids系列标本的发现,揭示了陕南地区早寒武世丰富多样的carinachitids生命世界。三辐射对称的Emeiconularia在四川峨眉及陕西南部的震旦-寒武系界线附近都有分布,因而对前寒武纪—寒武纪跨界地层具有划分对比意义。两新种的发现无疑增加了我们对早期锥石类多样性的认识,为证实多样性的刺细胞动物在早寒武世早期已经存在的假说提供了新线索。更多还原

【Abstract】 Emeiconularia amplcanalis sp.nov. and Carinachites platus sp.nov. of protoconulariids are described from Kuanchuanpu Member of the Dongying Formation near the Sinian-Cambrian boundry of Ningqiang Country, Shaanxi Province. These fossils are diversified in shape and different in size. The fossils of bilateral, tri-radial and tetra-radial- symmetry characterize the Carinachites biota in early Cambrian in south Shaanxi. Tri-radial fossils occur both near the Sinian-Cambrian boundary of South Shaanxi Province and Emei region,Sichuan Province. This is important in dividing and correlating the Sinian-Cambrian boundary. The discovery of two new species improve our knowledge of diversity for protoconulariids. Meanwhile,it provides new clue for the hypothesis about diverse cnidaria in early Cambrian.更多还原