13" Actinocrinites Crinoid With Agaricocrinus - Crawfordsville, Indian

This is a very impressive crinoid specimen from the famous Crawfordsville, Indiana locality. There is a large Actinocrinites gibsoni crinoid measuring 13" long with a smaller Agaricocrinus americanus running underneath the stem of the larger one. You don't typically get these crinoids with long stems like this preserved. The entire piece of limestone measures 15x7"

The quality of preparation on this fossil is exquisite - using skillful air-abrasion techniques under a stereo microscope. There is some matrix restoration to both the top and the bottom of the piece as well as one crack repair. 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.

Actinocrinites gibsoni & Agaricocrinus americanus
Witherspoon Quarry, Crawfordsville, Indiana
Ramp Creek Limestone
Actinocrinites 13", Rock 15x7"
We guarantee the authenticity of all of our
specimens. Read more about our
Authenticity Guarantee.