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Showing results for tags 'close coiled;'.
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form the late carb/early permian statum in Shanxi, China. The coil does remsemble an evolute nautilus, but it is only 6mm in diameter. I guess ome could not say it is a young nautilus or something, as the conch is hard material , and old part can could not change with growth. too big for fusulina. and not like a gastropod either.