Pentacrinites

Pentacrinites is an extinct genus of crinoid that lived from the Middle Triassic to the Eocene of Asia, Europe, North America, and New Zealand. Their stems are pentagonal to star-shaped in cross-section and are the most commonly preserved parts. Pentacrinites are commonly found in the Pentacrinites Bed of the Early Jurassic (Lower Lias) of Lyme Regis, Dorset, England.