10.5" Fossil Crinoid Plate (Six Species) - Crawfordsville, Indiana

Fossil Crinoid Plate (Six Species) - Crawfordsville, Indiana #197529

This is a beautiful, 10.5" plate of twelve detailed fossil crinoids and a gastropod of the species Platyceras acutirostre (#93), collected from Crawfordsville, Indiana. These fossils have been microscopically prepared using air abrasives, revealing their intricate details and three dimensional preservation. The twelve crinoids include the species Cyathocrinites multibrachiatus (#17), Halysiocrinus tunicatus (#27), Hypselocrinus hoveyi (#32), Scytalocrinus decadactylus (#47 x4), Agaricocrinus americanus (#54 x4) and Onychocrinus ulrichi (#81).

Comes with an acrylic/metal display stand.

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