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

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 characte...

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Published in:Chinese science bulletin 2007-03, Vol.52 (5), p.717-719
Main Authors: Hu, ShiXue, Luo, HuiLin, Hou, ShuGuang, Erdtmann, Bernd-Dietrich
Format: Article
Language:English
Subjects:
下寒武统
云南武定
关山动物群
棘皮类动物
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description 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.
doi_str_mv 10.1007/s11434-007-0083-6
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subjects 下寒武统
云南武定
关山动物群
棘皮类动物
title Eocrinoid echinoderms from the Lower Cambrian Guanshan Fauna in Wuding, Yunnan, China
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