Eocrinoid echinoderms from the Lower Cambrian Guanshan Fauna in Wuding,Yunnan,China  

作　　者：HU ShiXue LUO HuiLin HOU ShuGuang Bernd-Dietrich ERDTMANN 

机构地区：[1]Yunnan Institute of Geological Sciences, Kunming 650011, China [2]Technische Universitat Bedin, D-13355 Berlin, Germany

出　　处：《Chinese Science Bulletin》2007年第5期717-719,共3页

基　　金：Supported by the Major Basic Research Project of Ministry of Science and Technol-ogy of China (Grant No. 2002CCA03300);the State Key Laboratory of Palaeo-biology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS) (Grant No. 053110)

摘　　要：This is a brief report of a new occurrence of eocrinoids from the Early Cambrian Wulongqing Formation in Yunnan, China. The eocrinoids from the Guanshan fauna are among the earliest known eocrinoids. Different from many other Early and Middle Cambrian eocrinoids, the Guanshan eocrinoids are char-acterized by the absence of sutural pores and epispires, the long and spiral brachioles, the extremely long stalk, and the ratio of the length of the stalk versus that of the calyx. The discovery of the eocri-noids from the Guanshan fauna not only provides new information to the investigation of the early evolution of this animal group, but also shed new light on the occurrence and migration of early eocrinoids.This is a brief report of a new occurrence of eocrinoids from the Early Cambrian Wulongqing Formation in Yunnan, China. The eocrinoids from the Guanshan fauna are among the earliest known eocrinoids. Different from many other Early and Middle Cambrian eocrinoids, the Guanshan eocrinoids are characterized by the absence of sutural pores and epispires, the long and spiral brachioles, the extremely long stalk, and the ratio of the length of the stalk versus that of the calyx. The discovery of the eocri- holds from the Guanshan fauna not only provides new Information to the investigation of the early evolution of this animal group, but also shed new light on the occurrence and migration of early eocrinoids.

关 键 词：棘皮类动物 下寒武统 关山动物群 化石 云南武定 

分 类 号：Q915.821[天文地球—古生物学与地层学] Q914.727.4[生物学—古生物学]