8.3" Fossil Crinoid Plate (Ten Species) - Crawfordsville, Indiana

Fossil Crinoid Plate (Ten Species) - Crawfordsville, Indiana #269722

This is a beautiful, 8.3" plate of detailed fossil crinoids from Crawfordsville, Indiana. There are thirteen crinoids representing ten separate species. They have been microscopically prepared using air abrasives. A partial gastropod of the species Platyceras equilaterelis can also be found on this plate.

An acrylic display stand is included for your convenience.

The crinoids include:

#16 - Cyathocrinites sp. (x2)
#17 - Cyathocrinites multibrachiatus
#35 - Pachylocrinus aequalis (x2)
#36 - Hylodecrinus gibsoni
#37 - Abrotocrinus manus
#52 - Actinocrinites gibsoni
#54 - Agaricocrinus americanus
#72 - Platycrinites brevinodus
#81 - Onychocrinus ulrichi (x2)
#100 - Cyathocrinites iowensis

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