Neocrinus decorus Directory References Discover 11 Egyptian Gods and Goddesses Did Marie-Antoinette Really Say “Let Them Eat Cake”? Inventors and Inventions of the Industrial Revolution Cinco de Mayo Timeline of the Space Race, 1957–69 7 Deadliest Weapons in History Timeline of the 1980s Contents Ask Our Chatbot a Question Neocrinus decorus echinoderm Ask Our Chatbot a Question Learn about this topic in these articles:description In sea lily…common West Indies species is Neocrinus decorus. More than 5,000 extinct species—some 20 m (65 feet) long—are known. They are important index fossils of the Paleozoic Era (from 542 million to 251 million years ago).Read More Britannica ChatbotChatbot answers are created from Britannica articles using AI. This is a beta feature. AI answers may contain errors. Please verify important information using Britannica articles. About Britannica AI.