5" Fossil Crinoid Plate (Two Species) - Crawfordsville, Indiana

This is a beautiful, 5" wide plate of detailed fossil crinoids from Crawfordsville, Indiana. These fossils have been microscopically prepared using air abrasives, revealing their intricate details and three dimensional preservation. The two crinoids include Agaricocrinus americanus (#54 - 3.1" long including stem) and Parascytalocrinus validus (#46 - 3.3" long including stem).

The stem of the Agaricocrinus crinoid has been mounted to the specimen.

Comes with an acrylic display stand.

There is a repaired crack through one of arms of the crinoid which required some touchup restoration and minor gap fill.

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.

Agaricocrinus americanus & Parascytalocrinus validus
Crawfordsville, Indiana
Edwardsville Formation
5 x 3.95" rock
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