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Published online by Cambridge University Press: 01 May 2009
One internal cast of the pedicle-valve of a species of Athyris seems indistinguishable from A. subtilita Hall which occurs in the Carboniferous of Belgium, and has recently been recorded from Eastern Yunnan. The general shape and narrow median sulcus, the concentric sublamellose growth-ridges, and small, parallel dental plates, are well seen in our specimen.
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