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A restudy of Oryctocephalus indicus (Reed, 1910)
Zhao Yuanlong;  Yuan Jinliang;  Peng Shanchi;  Yang Xinglian;  Peng Jin;  Lin Jihpai;  Guo Qingjun
2006
发表期刊Progress in Natural Science
卷号16期号:11页码:1180-1182
摘要

Restudy on morphology of Oryctocephalus indicus (Reed, 1910), based on suecimens from Guizhou, China and Nevada USA, suggests that the subspecies regarded previously as Oryctocephalus indicus indicus (Reed, 1910), O. indicus latus Zhoa et Yuan 2002, and O. indicus kobayashi Saito, 1934, are synonymous, and Oryctocephalus americanus Sundberg et Mc Collum, 2003 is a similar form of O. indicusOryctocephalus indicus is rediagnosed as having a glabella that is subconical in outline and tapering forward slightly; a thorax that comprises 12 segments, and a small pygidium that bears 2–3 axial rings with a terminal piece and a postaxial ridge. Oryctocephalus indicus is widely distributed in eastern Guizhou and ranges through a great interval of Kaili Formation. Its first appearance is almost identical with these events of trilobite extinction-recovery occurring at the end of Early Cambrian, the alternation of acritach assemblages, the change of trace elements (RFE) and stable isotopes (carbon) at the Wuilu-Zengjiaya section. As one of the key forms for defining the traditional Lower - Middle Cambrian boundary (the base of Cambrian Series 3 and Stage 5 in the new Cambrian chronstrantigraphy standard), O. indicus has received detailed study and has more advantages than other species such as Ovatoryctocara granulata Tchernysheva, 1962 or Arthricocephalus chauveaui Bergeron, 1899.

关键词Oryctocephalus Indicus restudy kaili Formation cambrian guizhou china
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/8269
专题环境地球化学国家重点实验室
作者单位1.College of Resource and Environment of Guizhou University , Guiyang, 550003, China
2.Nanjing Institute of Geology and Palaeontology , Chinese Academy of Sciences , Nanjing, 210008, China
3.Department of Geological Science , Ohio State University , Columbus, OH 43210, USA
4.Institute of Geochemistry , Chinese Academy of Sciences , Guiyang, 550002, China
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GB/T 7714
Zhao Yuanlong;Yuan Jinliang;Peng Shanchi;Yang Xinglian;Peng Jin;Lin Jihpai;Guo Qingjun. A restudy of Oryctocephalus indicus (Reed, 1910)[J]. Progress in Natural Science,2006,16(11):1180-1182.
APA Zhao Yuanlong;Yuan Jinliang;Peng Shanchi;Yang Xinglian;Peng Jin;Lin Jihpai;Guo Qingjun.(2006).A restudy of Oryctocephalus indicus (Reed, 1910).Progress in Natural Science,16(11),1180-1182.
MLA Zhao Yuanlong;Yuan Jinliang;Peng Shanchi;Yang Xinglian;Peng Jin;Lin Jihpai;Guo Qingjun."A restudy of Oryctocephalus indicus (Reed, 1910)".Progress in Natural Science 16.11(2006):1180-1182.
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