This Specimen has been sold.
2.1" Cretaceous Sea Urchin (Hemiaster) Fossil - Texas
This is a beautifully detailed and inflated fossil sea urchin of the species Hemiaster elegans from the Cretaceous Washita Group in Lake Texoma, Texas. This echinoid is in excellent condition and measures 2.1" in length.
Sea urchins are a type of echinoderm which are still living relatively unchanged today. They live at the bottom of soft ocean floors and have long spines protruding from their central body. They move along the bottom of the ocean using many small feet while feeding on various plant and animal matter.