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Mystery fossil, Warsaw Formation, Mississippian, Missouri


pefty

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Very odd little fossil found today in the Mississippian Warsaw Formation of St Louis County, Missouri, USA. All insights appreciated. 

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Do you prep? If so blast off some of that calcitic limestone by the "segments" on the left side. Might make ID much easier. Kinda looks crinoidal, hard to tell though. Shape and size don't look like a mississippian trilo pygidium to me though, they tend to be smaller in size.

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