I recently picked up a Helicoplacus for my collection. One of the earliest and strangest echinoderms.
David Clark
Interesting reconstruction of the enigmatic Cambrian echinoderm Helicocystis, which is one of the oldest stalked echinoderms with radial symmetry. Fossils like Helicocystis are important because they help us understand how echinoderms evolved from bilateral to pentaradial body plans
