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Saturday April 20, 2024 at 5:07:31 AM (EST)
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Name:
Stellarocrinus virgilensis
Age: Pennsylvanian
Formation: Bond Formation (LaSalle Limestone)
Location: Pontiac, Illinois
Size: Crinoid is 2.8 inches across
This specimen is not for sale
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Anyone who knows anything about crinoids should recognize this gem. This is a spectacular Stellarocrinus virgilensis from the Pennsylvanian strata near Pontiac, Illinois that we recently obtained from a major echinoderm collection. This large crinoid was collected many years ago - the site has been closed to collecting for 25 years. This type of crinoid has a shallow, bowl-shaped cup with highly sculpted plates and very stout, biserial arms. There are short spikes or protuberances randomly positioned on the arms - perhaps some sort of defense mechanism. This echinoderm is very 3-dimensional and exhibits wonderful detail. The plate structure is beautifully displayed - the individual plates of the crinoid are easily seen. This crinoid has been removed from the surrounding matrix so that it can be viewed from all angles. On the other side of the specimen, the anal tube is easily seen with a black Platyceras gastropod still tightly attached. The pinkish-white color of the fossil is totally natural and quite striking. This is an outstanding example of Stellarocrinus from a closed location.
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