5.2" Scytalocrinus Crinoid - Crawfordsville

This is a nicely preserved Scytalocrinus decadactylus crinoid from the famous Witherspoon Quarry near Crawfordsville, Indiana. It's been prepared under microscope using air abrasives to reveal even the most minute details. It has a nice, long section of stem. This piece is a composite, meaning that the crown of the crinoid and the stem are from two seperate individuals and were remounted onto the rock.

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.
Scytalocrinus decadactylus
Witherspoon Quarry, Crawfordsville, Indiana
Ramp Creek Limestone
5.2" long on 5.75x2.65" matrix
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