Superb 3.6" Fossil Crinoid (Agaricocrinus) & Starfish - Indiana

Superb Fossil Crinoid (Agaricocrinus) & Starfish - Indiana #296786

This is an incredibly detailed, large, and well preserved Agaricocrinus americanus crinoid that's preserved alongside a starfish (Onychaster flexilis), collected from the Edwardsville Formation of Crawfordsville, Indiana. The quality of preparation on this fossil is exquisite, using skillful air-abrasion techniques under a stereo microscope.

A good amount of the stem is from the same species but has been mounted to the rock. Comes with an acrylic display stand.

#54 - Agaricocrinus americanus
#89* - Onychaster flexilis

Crinoids from the Ramp Creek Limestone were likely 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.

About Crinoids