6.6" Scytalocrinus Crinoid With Long Stem - Crawfordsville

This is a nicely preserved Scytalocrinus decadactylus crinoid with a long section of stem preserved from the famous Witherspoon Quarry near Crawfordsville, Indiana. It's been prepared under microscope using air abrasives to reveal even the most minute details. There has been a fair amount of matrix repair work done on this specimen, because it was broken into several pieces when found.

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
6.6" long on 5.8x5.6" matrix
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