Description
These Rastellum Carinatum half pieces are also known as Biting Clams from around 160 million years ago. They coil with the outer side being ridged and the inner side is typically concave while the edges have the zipper or bite. No two pieces are the same so yours may vary in shape and size, etc.
Great and unique addition for collectors!
Age: 160m est
Weight: Varies 1-2oz per piece
Origin: Madagascar
