古似渔乡叶肢介科的分类及演化

本文根据壳瓣胎壳大小,生长带装饰类型及生长线上有无瘤、刺构造等特征,论述了古似渔乡叶肢介科的分类,并将其划分为5个亚科(1新亚科)18属(2新属)。对一些长期来分类混乱的属作了阐述。并讨论了该科的起源及系统发生。     

SEQUENCE OF FOSSIL BIOTIC GROUPS OF JURASSIC AND CRETACEOUS IN CHINA

The provincialism and assemblages of the eight fossil biotic groups of Jurassic andCretaceous in China (namely, conchostracans, ostracods, bivalves, charophytes, ammonoids, fora-minifers, brachiopods and pollen-spores) are briefly summarized in this paper, and this providesscientific basis for studying the stratigraphical province and classification of this period.     

中国侏罗、白垩纪化石群序列

本文概要地叙述了中国侏罗、白垩纪叶肢介、介形类、瓣鳃类(双壳类)、腕足类、菊石、有孔虫、轮藻和孢子花粉等八个主要化石门类的地理区系及组合序列,成为对这一时代地层分区和地层划分对比进行研究的最新科学依据。     

中国侏罗、白垩纪的地层划分

本文从古地理、沉积特征与古生物地理区系的观点出发,分别对中国早、中侏罗世、晚侏罗世、早自垩世和晚白垩世的地层区划进行了探讨;在化右群序列和上述讨论的基础上,对中国这一时代的地层进行了划分与对比,还提出了每一个地层分区或小区有代表性的地层建组命名的意见.     

CLASSIFICATION AND EVOLUTION OF FAMILY PALEOLIMNADIOPSEIDAE (CONCHOSTRACA)

Based on sculpture of the valve, the size of umbo and the growth line with or without nodes or spines, etc. the family Palcolimnadiopseidae may be classified into 5 subfamilies (including one new subfamily) and 18 genera (including two new genera). In the present paper the author tries to propose a new schcme of the classification and to discuss the origin and evolution of the family Paleolimnadiopseidae.     

STRATIGRAPHICAL CLASSIFICATION OF JURASSIC AND CRETACEOUS IN CHINA

The stratigraphical provinces, subdivisions and correlations of the Early and MiddleJurassic, Late Jurassic, Early Cretaceous and Late Cretaceous are separately discussed accordingto their characteristics of palaeogeography, biogeography and sedimentation. The names forthe typical formations of each stratigraphical province or subprovince are also proposed inthis paper.