Early Cambrian Mollusc Watsonella crosbyi: A Potential GSSP Index Fossil for the Base of the Cambrian Stage 2
Li Guoxiang (李国祥)1; Zhao Xin1; Gubanov, Alexander2; Zhu MaoYan (朱茂炎)1; Na Lin (那琳)1
2011-04-01
发表期刊ACTA GEOLOGICA SINICA-ENGLISH EDITION
ISSN1000-9515
卷号85期号:2页码:309-319
摘要

The mollusc Watsonella crosbyi was studied on the basis of material from the lower Cambrian Dahai Member of the Zhujiaqing Formation in eastern Yunnan, China and the Pestrotsvet Formation of the Aldan River region in the Siberian Platform. This fossil had been excessively described under different names in the literature, such as Heraultia varensalensis Cobbold, 1935, H. sibirica Missarzhevsky, 1974, Heraultipegma yunnanensis He and Yang, 1982, H. yannanese He and Yang, 1982, Watsonella yunnanensis, W. crosbyi Grabau, 1900, etc. Taxonomic revision shows that other species are junior synonyms of W. crosbyi. Analysis of functional morphology implies that W. crosbyi may be rather a helcionelloid than a rostroconch since its univalved conch is untorted endogastric and lacks a rostrum id a true internal pegma. Replicas of the original microstructures preserved on the surfaces of phosphatic internal moulds confirm that the shell consists of two layers. The inner layer is lamello-fibrillar, and the outer layer is spherulitic prismatic. The widespread geographical occurrences in both siliciclastic and carbonate rocks of the late Terreneuvian indicate that W. crosbyi is an important index fossil for global correlations and subdivision of the Cambrian Series 1 (Terreneuvian). The first appearance datum (FAD) of W. crosbyi is suggested to be a potential GSSP (Global Boundary Stratotype Section and Point) candidate marker for defining the base of the Cambrian Stage 2.

关键词Mollusc Watsonella Crosbyi Microstructure Terreneuvian Cambrian Stage 2 South China Siberian Platform
语种英语
关键词[WOS]Shell Microstructures ; South China ; Biostratigraphic Correlation ; Rostroconchia ; Anabarella ; Boundary ; Siberia
资助项目Chinese Academy of Sciences[KZCX3-EW-115] ; Ministry of Science and Technology of China[2006FY120300-3] ; National Natural Science Foundation of China ; National Science and Technology Major Project[2008ZX05008-001-001]
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000289845800005
项目资助者Chinese Academy of Sciences ; Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Science and Technology Major Project
出版者WILEY-BLACKWELL
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/473
专题中国科学院南京地质古生物研究所
中国科学院南京地质古生物研究所
其他
通讯作者Li Guoxiang (李国祥)
作者单位1.Chinese Acad Sci, State Key Lab Palaeobiol & Stratig, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China
2.Univ Cambridge, Dept Earth Sci, CASP, Cambridge CB2 3EQ, England
推荐引用方式
GB/T 7714
Li Guoxiang ,Zhao Xin,Gubanov, Alexander,et al. Early Cambrian Mollusc Watsonella crosbyi: A Potential GSSP Index Fossil for the Base of the Cambrian Stage 2[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2011,85(2):309-319.
APA Li Guoxiang ,Zhao Xin,Gubanov, Alexander,Zhu MaoYan ,&Na Lin .(2011).Early Cambrian Mollusc Watsonella crosbyi: A Potential GSSP Index Fossil for the Base of the Cambrian Stage 2.ACTA GEOLOGICA SINICA-ENGLISH EDITION,85(2),309-319.
MLA Li Guoxiang ,et al."Early Cambrian Mollusc Watsonella crosbyi: A Potential GSSP Index Fossil for the Base of the Cambrian Stage 2".ACTA GEOLOGICA SINICA-ENGLISH EDITION 85.2(2011):309-319.
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