500 – 0 million years old
Echinoderms is a common name for a group of animals and fossils that include the sea lily but also the sea star. The first echinoderms appeared about 500 million years ago in a period called the Cambrian. In our fossils and minerals webshop, we sell fossil crinoids and fossil sea urchins. Crinoids look like sea lilies (so plant), but are actually marine animals. They both lived in shallow water and in depths as large as 6,000 meters and they first appeared about 485 million years ago and are still alive. The crinoid stems that we sell are between 450-330 million years old and found in the US or Morocco. Sea urchins originated around the Ordovician, about 450 million years ago, and just like the crinoids still alive today. The sea urchins that we sell come from different places of the world and have different ages.
