Two Crinoids With Starfish - Crawfordsville, Indiana (reduced price)

This is a rare Agaricocrinus crinoid partially wrapped up by an Onychaster flexilis (starfish), associated with a small Cyathocrinites sp., from Crawfordsville, Indiana. Two tentacles of the starfish can be found wrapped around the crinoid. Unfortunately, the body of the starfish is smothered by the crinoid. The quality of preparation on this fossil is exquisite - using skillful air-abrasion techniques under a stereo microscope.

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.