Description Offered here is a genuine Hemiaster fossil echinoid from the Cretaceous period, discovered in Spain. This echinoid (sea urchin) is well-preserved, displaying the typical heart-shaped form associated with the genus Hemiaster. The fossil in the photograph is the exact specimen you will receive. A 1cm scale cube is shown for reference; please refer to the image for full sizing. Species & Classification: Species: Hemiaster sp. Type: Fossil Echinoid (Sea Urchin) Family: Schizasteridae Order: Spatangoida Super Family: Spatangoidea Phylum: Echinodermata Geological & Stratigraphic Context: Geological Period: Cretaceous Age: Approx. 66–100 million years old (exact stage unspecified) Location: Spain Depositional Environment: Hemiaster echinoids are typically associated with soft, fine-grained marine sediments, deposited in shallow to moderately deep shelf environments with low energy. Morphological Features: Characterised by a heart-shaped, bilaterally symmetrical test (shell), often with a distinct anterior groove (petalodium) and prominent peristome. Adapted for burrowing in soft sediment, with a flattened underside and well-developed petaloid ambulacra. Notable Facts: Hemiaster echinoids are important biostratigraphic markers and serve as useful indicators of Cretaceous marine environments in Europe. Their excellent preservation and aesthetic form make them desirable for both scientific and display purposes. Why Buy From Us? 100% genuine fossil, ethically sourced Comes with a Certificate of Authenticity You will receive the exact fossil shown in the images Selected for its clarity, completeness, and visual appeal This Hemiaster fossil echinoid is a striking and scientifically valuable specimen, perfect for collectors, educational use, or as a unique natural display piece. Add a beautiful example of Cretaceous marine life to your collection today.
