3.4" Platycrinites Sp, Platyceras Gastropod Crinoid Fossil Mississippian Age Burlington Iowa

Location: Burlington Formation, Burlington, Iowa

Weight: 9.7 Ounces 

Dimensions: 3.4 Inches Long, 2.7 Inches Wide, 1.9 Inches Thick (Plate)

Mississippian Age, 323 Million Years Old

The Item Pictured is the one you will receive. 

 Platycrinites Sp, Platyceras Gastropod Crinoid 

Crinoids, commonly called sea lilies, are actually animals—not plants. They belong to the echinoderm family, alongside starfish, sea urchins, and brittle stars. Most Paleozoic crinoids attached themselves to ocean floor substrates. They are known for their feathery, tentacle-like arms that unfurl like flowers and catch food particles like plankton. Although crinoids appeared during the Ordovician period, they survived the Permian mass extinction and have evolved into hundreds of species still living today.