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Name:
Gilbertsocrinus and Cyathocrinites
Age: Mississippian
Formation: Edwardsville
Location: Crawfordsville, Indiana
Size: Gilbertsocrinus crown is 2.3" across
This specimen is not for sale
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Here is an extremely displayable, double crinoid plate from the Mississippian of Indiana. The crinoid on the left side of the slab is an excellent "bottoms up" example of Gilbertsocrinus dispansus - one of the most collectible crinoids to be found at this site. This type of camerate crinoid has a large cup comprised of many protruding plates. Five long, branching, biserial appendages arise from the tegmen and drape over the cup, somewhat like an umbrella. This crinoid has very thin, tiny, biserial arms that exhibit a multitude of pinnules. This specimen displays all of these features in wonderful fashion. Even the tiny arms, complete with pinnules, are easily seen. This is highly unusual - these arms are not present in most specimens. On the right side of the plate is a great example of Cyathocrinites multibrachiatus. This inadunate crinoid has a bowl-shaped cup with granulated plates. The long, multi-branching, uniserial arms are complete to the very tips. As a rule, this crinoid usually has arms that are missing or broken off short - not so with this specimen. This crinoid still has some of the stem tightly attached to the cup. The 3-dimensional fossils have great color and contrast. They are well positioned on the large, rectangular plate of siltstone. This is a beautiful crinoid plate from Crawfordsville that even the most discerning collector would appreciate.
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