Abstract
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 eocrinoids 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.
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Supported by the Major Basic Research Project of Ministry of Science and Technology of China (Grant No. 2002CCA03300) and the State Key Laboratory of Palaeobiology and Stratigraphy (Nan**g Institute of Geology and Palaeontology, CAS) (Grant No. 053110)
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Hu, S., Luo, H., Hou, S. et al. Eocrinoid echinoderms from the Lower Cambrian Guanshan Fauna in Wuding, Yunnan, China. CHINESE SCI BULL 52, 717–719 (2007). https://doi.org/10.1007/s11434-007-0083-6
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DOI: https://doi.org/10.1007/s11434-007-0083-6