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Thursday April 25, 2024 at 11:00:56 AM (EST)
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| EXTINCTIONS CHOICE - Multiple Pontiac Plate |
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ILLINOIS
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OTHER SITES
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| Stock Number CCILX08 |
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Name:
See Description
Age: Pennsylvanian
Formation: Bond Formation (LaSalle Limestone)
Location: Pontiac, Illinois
Size: Plate is 3.3" X 3.7"
This specimen is not for sale
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This is a captivating crinoid specimen from the Pennsylvanian. It is a rare multiple plate of crinoids from the famous quarry near Pontiac, Illinois. This specimen was collected over 25 years ago, as the quarry has filled with water and been closed to collecting for many years. There are six crinoids on this slab - all are natural to the plate. In the upper left is an unusual juvenile specimen of Stellarocrinus sp. To the right of the Stellarocrinus is a beautiful example of Apographiocrinus typicalis. This crinoid still has a lengthy portion of the stem tightly attached. The arms are complete and in the ''splayed'' position. The many pinnules of the branching, uniserial arms are easily seen. Another small juvenile crinoid is immediatly below the Apographiocrinus. In the right center of the plate is a very robust specimen of Brabeocrinus christinae. This crinoid has a highly sculpted cup and a long anal tube with spikes that extends above the tops of the arms. The branching, uniserial arms are easily seen and a section of the stem is still intact. A juvenile crinoid of undetermined species is present immediately above the Brabeocrinus. On the far right side of the plate is a large specimen of Clathrocrinus clinatus. This highly uncommon crinoid has a small, bowl-shaped cup and long ''zig-zag'' arms that are unusually complete. The pinkish-white color of the 3-dimensional crinoids contrasts nicely with the gray matrix. The fossils are well positioned on the natural plate. This is a highly collectible plate of different crinoids from a famous site that has been closed to collecting for many years.
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