Spectacular, 13.9" Crinoid Plate (11 species) - Crawfordsville

This is a spectacular crinoid, coral and gastropod association from the Edwardsville Formation near Crawfordsville, Indiana, with eighteen individual specimens present, of which eleven are different species. All are preserved 3D and have been prepared with air abrasives. The entire piece is 13.9 x 10.5". There is a massive Platycrinites saffordi crinoid directly associated with a Platyceras sp. (gastropod), a Parascytalocrinus sp., four Macrocrinus mundulus crinoids, three Agaricocrinus splendens, two Cyathocrinites sp., a Lanecrinus depressus, two Platycrinites niotensis, two Scytalocrinus robustus, a Pachylocrinus aequalis and a Cladochonus beecheri (coral). This is a natural association and none of the crinoids, coral or gastropod are composites.

Comes with a display stand.

Identification by #:

#16 - Cyathocrinites sp. (2)
#21 - Lanecrinus depressus
#35 - Pachylocrinus aequalis
#44 - Parascytalocrinus sp.
#45 - Scytalocrinus robustus (2)
#55 - Agaricocrinus splendens (3)
#69 - Macrocrinus mundulus (4)
#74 - Platycrinites niotensis (2)
#75 - Platycrinites saffordi
#92 - Platyceras sp. (gastropod)
#110 - Cladochonus beecheri (coral)

It is believed that crinoids from the Ramp Creek Limestone were buried in sediment from nearby deltas during storms. The resulting siltstone deposits are soft enough that fossils can be extracted in exquisite, three-dimensional relief.

Crinoids, sometimes commonly referred to as sea lilies, are animals, not plants. They are echinoderms related to starfish, sea urchins, and brittle stars. Many crinoid traits are like other members of their phylum. Such traits include tube feet, radial symmetry, a water vascular system, and appendages in multiples of five (pentameral). They first appeared in the Ordovician (488 million years ago) and some species are still alive today.

Crawfordsville, Indiana
Edwardsville Formation
Rock 13.9 x 10.5"
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