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Phosphatized Punctatus with mouthparts and its embryo fossils from the Lower Cambrian of Ningqiang, south Shaanxi, China |
| LIU Yunhuan1, LI Yong1, SHAO Tiequan1, YU Bo1, WANG Zhuo1, ZHANG Wanqian1, LI Rongxi1, ZHU Zhixin2 |
| 1.Earth Science Faculty, Chang′an University, Xi′an 710054, China; 2.Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China |
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Issue Date: 05 March 2007
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