Megascopic Symmetrical Metazoans from the Ediacaran Doushantuo Formation in the Northeastern Guizhou, South China |
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| Authors: | Wang Yue Wang Xunlian Huang Yuming |
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| Institution: | 1. School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;School of Resources and Environments, Guizhou University, Guiyang 550003, China
2. School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China |
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| Abstract: | In South China, various megascopic symmetrical metazoan fossils were found in the upper Doushantuo (陡山沱)Formation of the Neoproterozoic Ediacaran.The worm-like fossil is characterized by modern taxological annelid, for many metameres, parapodia, one possible tentale, an alimentary canal, and a dorsal vessel. The triradiate discoidal fossil is belong to Trilobozoa, and the octaradiate discoidal fossil might be Ctenophora. All these fossils indicate that the megascopic metazoans have appeared in the Doushantuoian of Eidacaran and imply that the symmetrical metazoans must have originated at least 550 Ma ago. |
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| Keywords: | symmetrical metazoan Doushantuo Formation Neoproterozoic Ediacaran South China |
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