Sand dollar fossil echinoderm Miocene Polished SDCA16

Description

These Paleocene fossils known as Sand dollar, a name used for many species of flattened, burrowing sea urchins belonging to the order Clypeasteroida. All members of Clypeasteroida have a rigid skeleton known as a test. The living animals have a skin of motile spines covering the test. Movement is accomplished by the coordinated action of the spines. Like other sea urchins, sand dollars have five paired rows of pores. The pores are arranged in a petal-like pattern. These pores are perforations in the endoskeleton.  3 inches diameter by 1 inch thick
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