关于Echinoconchus与Echinaria属征及时代问题的讨论

ADISCUSSOIN ON THE DIAGNOSTIC FEATURE AND GEOLOGICAL AGE OF ECHINOCONCHUS AND ECHINARIA

Ｅｃｈｉｎｏｃｏｎｃｈｕｓ与Ｅｃｈｉｎａｒｉａ是特征相似同产出于石炭纪地层中的腕足动物中的两个重要标准化石属。作者针对以往文献资料对该两属属征描述、插图选择、时代分布上混乱，根据自已教学、科研的经验，在分析归纳大量资料的基础上，找出了将原属Ｅｃｈｉｎｏｃｏｃｏｎｃｈｕｓ各个种重新划分其归“属”的意见。在时代分布上，两属相伴而生，均产出于石炭纪，仅Ｅｃｈｉｎａｒｉａ的个别种可出现于早二迭世。

Echinoconchus resembles Echinaria in the character of shells and they are important characteristic fossil of the Brachioplda in the Carboniferous.Because of the confusionof two genera in the general feature description,selection of illustration and gelological agedistribution in the past litertares the authors put forwards a new idea for distinguishing the belongingness of the species of Echimoconchus on the basis of the analysis of a large numberof referemces and the experiemce of authou’s teachings and sciemtific rescarches Both of the genera were accompanied each other and Occurred in carboniferous but one or two Species of Echinoconchus appeared in early Permam.