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Name:
Oklahomacystis tribachiatus
Age: Ordovician
Formation: Bromide Formation
Location: Carter County, Oklahoma
Size: Paracrinoid is 0.6 inches long
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Here is a very nice example of an unusual paracrinoid. This is Oklahomacystis tribrachiatus from the Ordovician of Oklahoma. The paracrinoid is still embedded in its surrounding matrix, which is quite unusual - most of this type is found loose and free of matrix. This primitive echinoderm is very 3-dimensional and exhibits great detail - the extremely ornamented plates are very nicely articulated. This is a great example of this bizarre Ordovician echinoderm.
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