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The advent of mineralized skeletons in Neoproterozoic Metazoa - new fossil evidence from the Gaojiashan Fauna
Hong, Hua; Zhe, Chen (陈哲); Yuan Xunlai (袁训来)
2007-06-01
Source PublicationGEOLOGICAL JOURNAL
ISSN0072-1050
Volume42Issue:3-4Pages:263-279
Abstract

The terminal Neoproterozoic (Ediacaran) Dengying Formation in southern Shaanxi, China, hosts two types of conical fossils: one is the so-called Conotubus, found in siliciclastic rocks in the lower and middle part of the Gaojiashan Member; the other is the renowned Cloudina in carbonate rocks of the upper Gaojiashan Member and succeeding Beiwan Member. Conotublis are conical and gently curved tubular fossils, with a variable rate of expansion. They are built of multiple thin, steep, eccentrically nested funnels set one within the next. A detailed comparison of the two conical fossils suggests that the organic tubes of Conotubus may be the precursor of the mineralized Cloudina tubes; this inference is consistent with their similarities in both wall structure and life style. Our research thus suggests that the organic skeleton preceded the rise of the mineralized skeleton in Cloudina-like fossils. Sophisticated hypotheses have been advocated, some linking the skeletal genesis to increasing levels of Ca2+ in the seas. others to the enlargement of body sizes of animals. Yet our findings have supported the 'arms race' hypothesis: skeletons evolved primarily through selective predation pressure. Copyright (c) 2007 John Wiley & Sons, Ltd.

KeywordTerminal Neoproterozoic Skeletonization Conotubus Cloudina Sinotubulites Predation Pressure Biomineralization
DOI10.1002/gj.1077
Language英语
WOS KeywordShelly Fossils ; Nama Group ; Cloudina ; China ; Preservation ; Namacalathus ; Borings ; Namibia ; Oman
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000247627400003
PublisherWILEY-BLACKWELL
Citation statistics
Cited Times:39[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/49
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorHong, Hua
Affiliation1.NW Univ Xian, Early Life Inst, State Key Lab Continental Dynam, Xian 710069, Peoples R China
2.NW Univ Xian, Dept Geol, Xian 710069, Peoples R China
3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing, Peoples R China
Recommended Citation
GB/T 7714
Hong, Hua,Zhe, Chen ,Yuan Xunlai . The advent of mineralized skeletons in Neoproterozoic Metazoa - new fossil evidence from the Gaojiashan Fauna[J]. GEOLOGICAL JOURNAL,2007,42(3-4):263-279.
APA Hong, Hua,Zhe, Chen ,&Yuan Xunlai .(2007).The advent of mineralized skeletons in Neoproterozoic Metazoa - new fossil evidence from the Gaojiashan Fauna.GEOLOGICAL JOURNAL,42(3-4),263-279.
MLA Hong, Hua,et al."The advent of mineralized skeletons in Neoproterozoic Metazoa - new fossil evidence from the Gaojiashan Fauna".GEOLOGICAL JOURNAL 42.3-4(2007):263-279.
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