First record of Lower Triassic <Emphasis Type="Italic">Undichna</Emphasis> spp. fish swimming traces from Emei,Sichuan Province,China |
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Authors: | TingQing Lu ZhanLei Wang XiYan Yang XiaoLi Zhang |
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Affiliation: | School of Resources and Environmental Engineering, Southwest Petroleum University, Chengdu 610500, China |
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Abstract: | We discuss traces from the ichnospecies Undichna unisulca recorded from the Triassic that are reported for the first time in this paper. These fossils are also some of the oldest
vertebrate ichnites discovered in China to date. The fish swimming traces (Undichna unisulca) described originate from the Lower Triassic. These traces were found in the Jialingjiang Formation and are located at a
gorge ∼7.5 km from Emei, Sichuan Province, China. The ichnospecies Undichna unisulca consists of a regular sinusoidal wave. The wavelengths and amplitudes are quite constant between each specimen ranging between
28–32 mm and 9–12 mm, respectively. The fish swimming traces and distribution within the same bed are preserved as hypichnial
ridges at the undersurface. |
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Keywords: | fish swimming trace Undichna unisulca Lower Triassic Jialingjiang Formation Emei Sichuan Province |
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