34MM Detailed Fossil Tetragramma Marticense Sea Urchin Echinoid Cretaceous Tooth Towards the end of the

Towards the end of the Devonian

commonly known as the Ice Age

facilitating predation on substantial fish

This robust shell structure was essential for protecting the developing embryo

They belong to the family Mercanariidae

34MM Detailed Fossil Tetragramma Marticense Sea Urchin Echinoid Cretaceous Tooth Towards the end of theLocation: Morocco Weight: 0. 9 Ounces Dimensions: 34MM Late Cretaceous 95 89 Million Years Old The item pictured is the one you will receive. Tetragramma marticense Sea Urchin belongs to the echinoid class of marine invertebrates, a group that includes modern sea urchins and sand dollars. Echinoids have an extensive fossil record dating back to the Late Ordovician Period, approximately 450 million years ago. Today, around 800 living species occupy