Kaili Biota: A Taphonomic Window on Diversification of Metazoans from the Basal Middle Cambrian: Guizhou, China  

作　　者：ZHAO Yuanlong ZHU Maoyan Loren E. BABCOCK YUAN Jinliang Ronald L. PARSLEY PENG Jin YANG Xinglian WANG Yue 

机构地区：[1]College of Resource and Environment Engineering, Guizhou University, Guiyang, Guizhou 550003, China [2]Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, Jiangsu 210008, China [3]Department of Geological Sciences, 125 South Oval Mall, The Ohio State University, Columbus, Ohio 43210, USA [4]Department of Earth and Environmental Sciences, Tulane University, New Orleans, LA 70118, USA

出　　处：《Acta Geologica Sinica(English Edition)》2005年第6期751-765,共15页地质学报（英文版）

基　　金：This research was supported in part by grants from the National Natural Sciences Foundation of China(40162002,40372023,40232020);from the Foundation of the Key and Basic Project of Science and Technology of Guizhou(Gui No.2002-309);from the Early and Special Projects of the Key and Basic Projects of the Ministry of Technology and Science of China(2002 CCC 02600)to Zhao;from the U S.National Science Foundation(0106883,0229757)to Babcock.

摘　　要：A Burgess Shale-type biota is, in part, characterized by a wide diversity of taxa and soft-part preservation. Each provides unique historical insights into early metazoan evolution. Among the more than 40 globally distributed biotas, the early Cambrian Chengjiang and Middle Cambrian Burgess-type biotas are the largest. The Kaili Biota, from the earliest Middle Cambrian of Guizhou, China, contains representatives of 110 metazoan genera belonging to 10 phyla. It contains many well-persevered soft-bodied specimens. This Chinese biota has become the third most taxonomically diverse Burgess Shale-type fauna. Because the Kaili Biota formed in an outer-shelf environment, its main faunal character is large numbers of eocrinoids and planktoic trilobites. The Kaili is younger than the Chengjiang Biota but older than the Canadian Burgess Shale Biota; it shares 30 genera with the Chengjiang and 38 genera with the Burgess Biota. The Kaili Biota displays a taphonomic window to the diversification and evolution of marine offshore organisms covering 5.13 million years between the Early and Middle Cambrian.A Burgess Shale-type biota is, in part, characterized by a wide diversity of taxa and soft-part preservation. Each provides unique historical insights into early metazoan evolution. Among the more than 40 globally distributed biotas, the early Cambrian Chengjiang and Middle Cambrian Burgess-type biotas are the largest. The Kaili Biota, from the earliest Middle Cambrian of Guizhou, China, contains representatives of 110 metazoan genera belonging to 10 phyla. It contains many well-persevered soft-bodied specimens. This Chinese biota has become the third most taxonomically diverse Burgess Shale-type fauna. Because the Kaili Biota formed in an outer-shelf environment, its main faunal character is large numbers of eocrinoids and planktoic trilobites. The Kaili is younger than the Chengjiang Biota but older than the Canadian Burgess Shale Biota; it shares 30 genera with the Chengjiang and 38 genera with the Burgess Biota. The Kaili Biota displays a taphonomic window to the diversification and evolution of marine offshore organisms covering 5.13 million years between the Early and Middle Cambrian.

关 键 词：Kaili Biota Burgess Shale-type BIODIVERSITY marine organisms Taijiangian CAMBRIAN GUIZHOU China 

分 类 号：P534.41[天文地球—古生物学与地层学]