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Page, A. A. and Wilby, P. R. and Williams, M. and Vannier, J. and Davies, J. R. and Waters, R. A. and Zalasiewicz, J. A. (2010) Soft-part preservation in a bivalved arthropod from the Late Ordovician of Wales. Geological magazine, 147 (2). pp. 242-252. DOI https://doi.org/10.1017/S0016756809990045