3 Crinoids and One Gastropod on One Plate - Crawfordsville, Indiana
This is a really cool crinoid and gastropod association from the Edwardsville Formation near Crawfordsville, Indiana, with two different crinoid species present. All are preserved 3D and have been prepared with air abrasives. There is a .9" long Camptocrinus sp., two Macrocrinus mundulus crinoids with the longest measuring 3.3" long (including stem) and a gastropod (Platyceras sp.) measuring .9" wide. Comes with an acrylic display stand.
Reference numbers for crinoid identification (white stickers):
#56 - Camptocrinus sp.
#69 - Macrocrinus mundulus
#97 - Platyceras sp. (gastropod)
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.