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《Acta Micropalaeontologica Sinica》 2002-01
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SPONGE SPICULES IN EARLY CAMBRIAN HETANG FORMATION, XIUNING, SOUTHERN ANHUI

HU Jie CHEN Zhe XUE Yao-song WANG Jin-quan WANG Jin-long and YUAN Xun-lai (Nanjing Institute of Geology and Palaeontology, Chinese Academy of Science, Nanjing 210008)  
We report a sponge spicule assemblage from the Lower Cambrian black shales of the Hetang Formation at Xiuning in Anhui Province, South China. Based on morphological differences, the spicules can be divided into 4 types including monaxons, biaxons, triaxons and tetraxons. In thin sections and macerated specimens, axial canal (or filament) and concentric stratification within the sponge spicules can be observed. Pyritization occurred commonly in spicules, which could play an important role for the preservation of the spicules. The Hetang sponge spicules indicate that the hexactinellids and demosponges evolved no later than the Meishucunian-Qiongzhusian (Tommotian - Atdabanian) time.
【Fund】: 科技部国家重点基础研究 ( G2 0 0 0 0 7770 1);; 中科院知识创新基金 ( KZCX2 -116 );; 国家自然科学基金 ( 4 9972 0 0 6 );; 江苏省科技项目 ( BK2 0 0 0 0 2 7);; 中科院南京地质古生物研究所开放实验室共同资助
【CateGory Index】: Q915.812
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