Absolutely Killer Macrocrinus Crinoid - Crawfordsville, Indiana

This Macrocrinus mundulus from the famous crinoid beds near Crawfordsville, Indiana is about as good as it gets. It's immaculately preserved with a long stem and anal tube still in place. Including the stem is measures 5.3" long with the crown being 2.3". Just look at the arms to see how they are preserved to the very tips which curl under. Beautifully prepared under microscope using air abrasives. Comes with a display stand.

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.

Macrocrinus mundulus
Witherspoon Quarry, Crawfordsville, Indiana
Ramp Creek Limestone
5.3" long including stem on 6.2x4.6"
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