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Saturday May 18, 2024 at 12:21:53 AM (EST)
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Name:
Cydrocrinus concinnus
Age: Mississippian
Formation: Edwardsville Formation
Location: Crawfordsville, Indiana
Size: Crinoid is 4.75 inches long!
This specimen is not for sale
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This is an extremely unusual crinoid. It is a fabulous Cydrocrinus concinnus from the Mississippian of Indiana. This type of crinoid has a small, cone-shaped cup with LONG, uniserial arms that are comprised of tiny wedge-shaped plates. It is highly uncommon to find this crinoid with the arms so well preserved. Most of the time when this scarce crinoid is found, the arms are broken off short or missing entirely. This specimen is extremely unusual in that the arms are complete to the tiny tips and are folded inward at the very top. A portion of the somewhat pentagonal stem is still tightly attached to the cup. The distinct sea lily is also nicely inflated and has great color and contrast. The crinoid is almost perfectly centered on the rectangular plate of siltstone. This is simply a textbook specimen of this rare crinoid from Crawfordsville, Indiana.
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