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I have plate of brachiopods crinoids  stem bits and bryozoans. Next a large piece of bryozoan is a bit of something I don’t recognize.  It has what looks like a base for attaching to a stem and cup shaped body. No patterns  or signs of attachment points on rim. There are two of these on this plate. Can someone identify these.Note brachiopods have small circular holes in shells. Holes cause by some predator.  Found in Lodgepole formation madison group in Little Belt Mountains Montana. These fossils a Mississippian in age. CheersDavid.