Fossil specimen of the crinoid Agaricocrinus americanus from the Mississippian Edwardsville Formation of Montgomery County, Indiana (PRI 70601). Also present is a small, parasitic gastropod called Palaeocapulus equilateralis. Specimen is from the collections of the Paleontological Research Institution, Ithaca, New York. Length of crinoid is approximtely 10 cm. Model by Emily Hauf.
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