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New discoveries of Cambrian pelmatozoan echinoderm ossicles from North China
Affiliation:1. Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China;2. Department of Earth Sciences, National Taiwan Normal University, Taipei 11677, Taiwan, China;3. Chatsworth, Spa Road, Llandrindod Wells LD1 5EY, UK;4. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China;5. Department of Geosciences, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 106, Taiwan, China
Abstract:A variety of echinoderm ossicles have been discovered in the middle to upper Cambrian rocks of the North China Craton. Material was collected from two localities: Shuangqiao (SQ) section (Paibian) in Hebei Province and Linyi (LY) (Guzhangian?–Paibian?) in Shandong Province. Six types of ossicles can be recognized, including rounded thecal plates, and columnals with a narrow lumen and ridged articulating facets. The combination of characters suggests an unknown stalked echinoderm, probably an eocrinoid, with relatively advanced columnal morphology.
Keywords:Echinoderm  Pelmatozoan  Ossicles  Guzhangian  Paibian  North China
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