Description
Genuine Hemipneustes striatoradiatus Fossil Sea Urchin from the Maastricht Formation
This genuine Hemipneustes striatoradiatus fossil sea urchin is an exceptional prehistoric marine specimen originating from the famous Maastricht Formation of Maastricht, Limburg, Netherlands. Dating to the Upper Cretaceous Maastrichtian stage, this beautifully preserved echinoid fossil lived approximately 72 to 66 million years ago during the final age of the dinosaurs.
The specimen shown in the photographs is the exact fossil you will receive. Carefully selected for its preservation, detail and natural display appeal, this authentic sea urchin fossil represents one of the classic echinoid species associated with the renowned Late Cretaceous marine deposits of the Netherlands.
This fossil includes a Certificate of Authenticity lifetime guarantee generic card confirming the specimen is 100% genuine.
Full sizing please see photo.
About Hemipneustes striatoradiatus
Hemipneustes striatoradiatus is an extinct species of irregular echinoid belonging to the class Echinoidea and order Spatangoida. These marine invertebrates are relatives of modern sea urchins and sand dollars and were specially adapted for life within soft seabed sediments.
Unlike spherical regular sea urchins, irregular echinoids evolved a more heart-shaped or elongated body form adapted for burrowing through marine sediment. Hemipneustes possessed a rigid calcite skeleton known as a test composed of tightly interlocking plates that protected the animal and supported specialised tube feet used for movement and feeding.
The species name striatoradiatus refers to the distinctive radiating surface ornamentation and striated plate structure commonly preserved on well-preserved specimens. Fossils often display clearly visible ambulacral zones, tubercle patterns and bilateral symmetry characteristic of advanced irregular echinoids.
This specimen preserves the classic morphology associated with Hemipneustes, including the inflated test structure and natural surface detail that make this species highly desirable among collectors of echinoid fossils.
Maastrichtian Stage and the Ancient Chalk Seas
The Maastrichtian stage represents the final age of the Cretaceous period immediately before the mass extinction event that ended the Age of Dinosaurs approximately 66 million years ago. The stage itself was named after the city of Maastricht due to the internationally important fossil-bearing strata exposed in the region.
During the Late Cretaceous, much of northwestern Europe was submerged beneath warm shallow tropical seas rich in marine life. Thick chalk and limestone deposits accumulated from microscopic marine organisms settling onto the sea floor over millions of years.
The Maastricht Formation preserves an extraordinary range of marine fossils including mosasaurs, ammonites, belemnites, crustaceans, fish and echinoids such as Hemipneustes. These deposits are among the most scientifically important Upper Cretaceous marine formations in Europe.
The fine carbonate sediments and stable marine conditions within these ancient seas allowed delicate echinoid skeletons to survive fossilisation in remarkable detail.
Natural Fossil Preservation
This fossil retains authentic natural preservation and has not been artificially replicated or reconstructed. The visible plate structure, surface ornamentation and mineralisation formed naturally during fossilisation over tens of millions of years.
The fossil displays genuine geological character and natural texture associated with Upper Cretaceous echinoids from the Maastricht Formation. Variations in colour and preservation are entirely natural and reflect the sedimentary and mineral conditions present during fossilisation.
Well-preserved echinoids such as Hemipneustes striatoradiatus are highly collectable due to their symmetrical form, recognisable anatomy and historical geological importance.
Scientific and Collectable Importance
Echinoids are important index fossils widely used by palaeontologists to interpret ancient marine environments and correlate sedimentary rock formations. Fossils from the Maastricht Formation are especially significant because they represent marine ecosystems immediately before the end-Cretaceous extinction event.
Hemipneustes striatoradiatus is particularly desirable among collectors due to its classic morphology and strong association with the famous Maastrichtian stage. Fossils from Maastricht have played a major role in the history of palaeontology and stratigraphy for centuries.
This specimen is ideal for collectors of echinoid fossils, sea urchin fossils, Cretaceous fossils, Dutch fossils, marine invertebrates and authentic prehistoric natural history specimens.
Certificate of Authenticity
Included with the fossil is a Certificate of Authenticity lifetime guarantee generic card confirming that the specimen is genuine. The photographs provided show the exact fossil you will receive, allowing collectors and buyers to purchase with complete confidence.
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