9.4" Agaricocrinus & Macrocrinus Crinoid Plate - Indiana

Agaricocrinus & Macrocrinus Crinoid Plate - Indiana #42989

Here are several detailed crinoids from the Ramp Creek Limestone of Indiana. There are two Agaricocrinus americanus, a pair of Macrocrinus mundulus and a Catillocrinus tennesseeae. This is a composite plate meaning the fossils were found individually, mostly free of the rock and attached to the rock for the display purposes. The price reflects that it is a composite piece.

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.

About Crinoids