Two, Large, Crinoid (Cactocrinus) Fossils - Gilmore City, Iowa

This is a 9.5" wide, thick slab of limestone partially covered in large crinoid (Cactocrinus) fossils from Gilmore City, Iowa. There are two large crowns present with the largest measuring 2.9" long. The rock is littered in additional fossils including multiple small unidentified crinoids, crinoid stems, bryozoans, and more.

There is a repaired crack through the rock. It comes with an acrylic-metal display stand.

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