360 to 286 million years ago
Related Interest: Paleozoic Paleobiology
A tour of life over geologic time and evolution as evidenced by the fossil record: Precambrian Fossils I Cambrian Fossils I Ordovician Fossils I Silurian Fossils I Devonian Fossils Carboniferous Fossils I Permian Fossils I Triassic Fossils I Jurassic Fossils I Cretaceous Fossils I Tertiary Fossils
Additional Lower Mississippian Crinoids from Crawfordsville, Indiana