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. 2022 May 17;12:8204. doi: 10.1038/s41598-022-11920-3

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Geologic map and legends of stratigraphic units and major structures of studied area are generated based on 1:50,000 geologic maps (Paishatun, Miaoli, Tachia, and Tungshih) released by the Central Geological Survey of Taiwan with additions of fossil localities. Studied specimens are a subset of museum specimens deposited at the Department of Geosciences, National Taiwan University (NTUG) (Ref.⁵). Map was created with Adobe illustrator CS6 (https://www.adobe.com/products/illustrator.html).