✒ Louisville Fossils ✒ Kentuckiana Mike says, "I am an amateur paleontologist who studies marine invertebrate fossils in the Louisville, Kentucky area. We have fossils from the Ordovician, Silurian, Devonian and Mississippian (Carboniferous) Periods of the Paleozoic era." I fell over this when researching a pin for my "Stone in my Shoe" board.
Crinoid fossils. These are Scyphocrinus elegans crinoids from the Silurian/Devonian period (about 440-360 million years ago). Crinoids are marine echinoderms that appear as early as the Ordovician period (500 million years ago). These crinoids have stalks by which they would attach themselves to the seabed, capturing food with feathery arms that formed a cup (seen at lower right and upper centre).