Sea Urchin Specimen - Large Inventory Updated 406 Their large pads and claws

Their large pads and claws allow them to run down prey in deep snow

Poster size

Average Horn Tip to Horn Tip 53-72 cm (20

Muskrat (SM-310)

Sea Urchin Specimen - Large Inventory Updated 406 Their large pads and clawsThis sea urchin fossil preserves the hard, calcite skeleton (test) of an echinoid, a marine invertebrate related to starfish and sand dollars. Fossils like this provide valuable insights into ancient marine environments and the evolutionary history of echinoderms, which have existed for over 450 million years. Features: Composition: The fossilized test is primarily composed of calcite, a crystalline form of calcium carbonate (CaCO), which often