1. General Introduction; 2. Multi-plated Skeletons and Regeneration; 3. Influence of Test Architecture and Environment; 4. Predation and Parasitism as Taphonomic Agents; 5. Preservation Pathways in the Recent and Past; 6. A Case Study of Echinoid Preservation: The Miocene of Sardinia; 7. Conclusions and Future Work; References.