Cystoidea represent a class of extinct echinoderms, these creatures lived attached to the sea floor by stalks. These creatures lived in the Paleozoic Era, 541-252 years ago and were wiped out with the Great Permian Extinction the largest extinction event in the history of Earth. Modern echinoderms include sea stars, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies. The concrete stamping tool has an overall size of 14” x 24” ( 35.5 x 61 cm.) with a medium slate texture.
Item # 9F28