Paleoecology of Commensal Epizoans Fouling Flexicalymene (Trilobita) from the Upper Ordovician, Cincinnati Arch Region, USA by Key, Marcus M, Schumacher, Gregory A, Babcock, Loren E, Frey, Robert C, Heimbrock, William P, Felton, Stephen H, Cooper, Dan L, Gibson, Walter B, Scheid, Debbie G, Schumacher, Sylvester A

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