| 1 | Conodont Biostratigraphy of the Middle Cambrian through Lowermost Ordovician in Hunan, South China显示文摘Since 1985, samples with a total weight of more than 14,000 kg, mainly from three key sections in western and northwestern Hunan, South China, have been processed for conodonts. In strata older than the late Late Cambrian paraconodonts have proved useful for stratigraphic subdivision and correlation. Thirteen conodont zones are proposed in the Middle Cambrian through lowermost Ordovician. The correlation between these zones and those of North China, western U.S.A., western Newfoundland, Canada, and Iran is discussed. In ascending order, these 13 zones are as follows: The Gapparodus bisulcatus-Westergaardodina brevidens Zone, Shandongodus priscus-Hunanognathus tricuspidatus Zone,Westergaardodina quadrata Zone, Westergaardodina matsushitai-W. grandidens Zone, Westergaardodina lui-W. ani Zone,Westergaardodina cf. calix-Prooneotodus rotundatus Zone, Proconodontus tenuiserratus Zone, Proconodontus Zone,Eoconodontus Zone, Cordylodus proavus Zone, Cordylodus intermedius Zone, Cordylodus lindstromi Zone, and Cordylodus angulatus Zone (lower part). The Westergaardodina lui-W. ani and Westergaardodina cf. calix-Prooneotodus rotundatus Zones replace the Westergaardodina proligula and Westergaardodina cf. behrae-Prooneotodus rotundatus Zones, respectively, in the lowermost Upper Cambrian. Two new species (Westergaardodina lui and Westergaardodina ani)and one conditionally identified species (Westergaardodina cf. calix) are described. | DONGXiping JohnE.REPETSKI StigM.BERGSTR(OE)M | 2004 | Acta Geologica Sinica(English Edition)2004，78，6： | 29 |
| 2 | The fossils of Orsten-type preservation from Middle and Upper Cambrian in Hunan, China——Three-dimensionally preserved soft- bodied fossils (Arthropods)显示文摘Exquisitely preserved three-dimensional soft- bodied fossils and typical Orsten-type preservation have been found from the strata of Middle and Late Cambrian in western Hunan, China. A preliminary description is provided for Hesslandona sp. (Phosphatocopida, Crustacea, Arthro-poda) and Skara sp. (Skaracarida, Crustaceam, Arthropoda). The scientific significance of Orsten-type preservation and prospects for future work on these fossils from Hunan are outlined. | DONGXiping PhilipC.JDonoghue LIUZheng LIUJie PENGFan | 2005 | Chinese Science Bulletin2005，50，13： | 14 |
| 3 | Affinities and functional morphology of the Middle Cambrian ornamented tubules from West Hunan,China显示文摘Problematic phosphatic tubular microfossils with ornamented sculptures are documented to exist in limestones of the up-per Middle Cambrian Huaqiao Formation at the Paibi section and the Wangcun section in West Hunan,China.Two morphological pat-terns,including Ornamented Tube Form I and Ornamented Tube Form II are described.Based on the analysis of the preservation,wall structure and composition of the fossils,it is deduced that these ornamented tubes may represent carapace spines of some Cambrian arthro-pods with phosphatic carapaces,such as bradoriid crustaceans.Analysis of functional morphology indicates that the sclerites may rather be considered of a defensive than grasping function on the original organism body. | ZHUCaifa DONGXiping | 2004 | Progress in Natural Science:Materials International2004，14，10： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员