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Name:
Actinocrinites gibsoni
Age: Mississippian
Formation: Edwardsville Formation
Location: Crawfordsville, Indiana
Size: Crinoid is 9.4 inches long including stem
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Here is a spectacular fossil crinoid. This large crinoid is Actinocrinites gibsoni from the Mississippian of Indiana. This sea lily is extremely inflated and exhibits excellent detail. A LONG, 3-dimensional stem is tightly attached to the huge, stellate-plated cup. The heavy, biserial arms are festooned with fine pinnules - these feathery pinnules are very easily seen. The fossil has great color and superb contrast with the light grey matrix. The crinoid is wonderfully centered on the large, rectangular plate of siltstone. This is a textbook fossil crinoid with very long stem and finely pinnulated arms preserved - one of the best single examples of this type we have ever seen.
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