Cambrian trilobite Ovatoryctocara granulata Tchernysheva, 1962 and its biostratigraphic significance

doi:10.1016/j.pnsc.2008.08.002

NIGPAS OpenIR

	Cambrian trilobite Ovatoryctocara granulata Tchernysheva, 1962 and its biostratigraphic significance
	Yuan, Jinliang 1; Zhao, Yuanlong 2; Peng, Jin 2; Zhu, Xuejian 1; Lin, Jih-pai 3
	2009-02-10
发表期刊	PROGRESS IN NATURAL SCIENCE
ISSN	1002-0071
卷号	19 期号:2 页码:213-221
摘要	The genus Ovatoryctocara Tchernysheva, 1962, and its key species Ovatoryctocara granulata Tchernysheva, 1962, are revised. Ovatoryctocara granulata occurs near the base of the Ovatoryctocara Zone and ranges up into the lower portion of the Kounamkites Zone in the Siberian Platform. O. granulata also appears in southeastern Guizhou, South China, but O. granulata in northern Greenland may represent an indefinite species. Specimens of Ovatoryctocara from Newfoundland cannot be identified to species level. Specimens including two cranidia and three pygidia from the lower part of the Aoxi Formation at Yaxi Village, Shizhu Town, eastern Tongren, northeastern Guizhou, were previously assigned to O. granulata, which is now reassigned as a new species O. yaxiensis sp. nov. It bears the following main features: glabella club-shaped, slightly expanded medially, with four pairs of lateral furrows, of which S1-S3 are triangular pits, S4 is shallow, connecting with axial furrow; shorter palpebral lobe situated a little anterior to the midway of facial suture across the fixigenae, longer posterolateral area (exsag.); semielliptical pygidium consisting of seven axial rings with a terminal piece and with eight pairs of marginal tips giving a sawtooth-like shape of the lateral margins in dorsal view. Although O. granulata is a widely distributed species, the FAD of O. granulata, for a global stage boundary, still has some disadvantages. First, its distribution is not as wide as that of Oryctocephalus indicus ( Reed, 1910). Second, specimens of O. granulata are common only in Siberia. Third, the strati-graphic range of the species has not been studied in detail in all continents. Fourth, O. granulata is relatively small and easily affected by post-burial distortion. Last but not least, there exists obviously a facies change between the Ovatoryctocara Zone ( lower Amgan Stage; deeper water facies) and the underlying Anabaraspis splendens Zone (Toyonian Stage; shallow water facies) in Siberian Platform. Nevertheless, the stratigraphic correlation utility of O. granulata in South China and Siberia is discussed. (C) 2008 National Natural Science Foundation of China and Chinese Academy of Sciences. Published by Elsevier Limited and Science in China Press. All rights reserved.
关键词	Trilobites Ovatoryctocara granulata Tchernysheva, 1962 Cambrian Biostratigraphy
DOI	10.1016/j.pnsc.2008.08.002
语种	英语
关键词[WOS]	MIDDLE ; DIVISIONS
资助项目	National Natural Science Foundation of China[40672018] ; National Natural Science Foundation of China[40762001] ; Foundation of the Mobile Project of Science and Technology of Guizhou Province[2007-4004] ; Foundation of the Governor of Guizhou Province[2006-7] ; Key Project of International Cooperation of Guizhou Science and Technology[2008-700110] ; Major Basic Research Projects of MST of China[2006CB80640]
WOS研究方向	Materials Science ; Science & Technology - Other Topics
WOS类目	Materials Science, Multidisciplinary ; Multidisciplinary Sciences
WOS记录号	WOS:000263557100011
项目资助者	National Natural Science Foundation of China ; Foundation of the Mobile Project of Science and Technology of Guizhou Province ; Foundation of the Governor of Guizhou Province ; Key Project of International Cooperation of Guizhou Science and Technology ; Major Basic Research Projects of MST of China
出版者	ELSEVIER SCIENCE INC
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/19427
通讯作者	Yuan, Jinliang
作者单位	1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China 2.Guizhou Univ, Coll Resource & Environm Sci, Guiyang 550003, Peoples R China 3.Ohio State Univ, Sch Earth Sci, Columbus, OH 43210 USA
推荐引用方式 GB/T 7714	Yuan, Jinliang,Zhao, Yuanlong,Peng, Jin,et al. Cambrian trilobite Ovatoryctocara granulata Tchernysheva, 1962 and its biostratigraphic significance[J]. PROGRESS IN NATURAL SCIENCE,2009,19(2):213-221.
APA	Yuan, Jinliang,Zhao, Yuanlong,Peng, Jin,Zhu, Xuejian,&Lin, Jih-pai.(2009).Cambrian trilobite Ovatoryctocara granulata Tchernysheva, 1962 and its biostratigraphic significance.PROGRESS IN NATURAL SCIENCE,19(2),213-221.
MLA	Yuan, Jinliang,et al."Cambrian trilobite Ovatoryctocara granulata Tchernysheva, 1962 and its biostratigraphic significance".PROGRESS IN NATURAL SCIENCE 19.2(2009):213-221.