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SOLD Plesiosaur Tooth and Mosasaur Tooth in Matrix - 1.83"

SOLD Plesiosaur Tooth and Mosasaur Tooth in Matrix - 1.83"

Featuring a long, snake-like neck and a stout body equipped with slender paddles, Plesiosaurs are one of the most readily identifiable of all ancient marine reptiles. Another member of the aquatic predator group is the Mosasaur, a dolphin like reptile with long jaws and powerful teeth to catch and swallow prey. These two creatures cohabitated some regions and fought for dominance over food supply in the Cretaceous.

This specimen is a paired fossil of both a Plesiosaur tooth and a Mosasaur tooth embedded in matrix. It was recovered from deposits in Morocco and dates to the Late Cretaceous Period. A paired fossil like this is quite rare and the specimen is one of a kind.

The exposed Plesiosaur tooth measures 1.85". The specimen ships in a sturdy shipping carton. A small information card for both creatures is enclosed that also serves as the certificate of authenticity. 

Please Note: All fossil teeth will show signs of repair (typically small cracks repaired with penetrative stabilizers). Some teeth will be reassembled. This is the nature of this item and is completely normal. In some cases, we have opted to vertically orient the specimen in pictures to give a better view of the tooth. 



Featuring a long, snake-like neck and a stout body equipped with slender paddles, Plesiosaurs are one of the most readily identifiable of all ancient marine reptiles. Biomechanical reconstructions suggest that Plesiosaurs moved through the water in the same way that turtles or penguins do, more like flying than swimming. Scientists have also discovered that Plesiosaurs used their unique bodies to hunt for bottom-dwelling crustaceans.


With nearly 140 million years in the fossil record, Plesiosaurs were incredibly successful creatures. As air-breathing reptiles, they lived near the surface in the open seas, and were able to spread around the world. Fossilized skeletons of Plesiosaurs have been found in Europe, North America, and Australia. New paleontological evidence suggests that Plesiosaurs may have given birth to live young instead of laying eggs, adding an interesting twist to a very unique family of reptiles.

Above: Portrait of Mary Anning by an unknown artist, sometimes referred to as Mr. Grey. In the background is the Golden Cap headland, the highest point on the South Coast of England. Sleeping in the foreground is Tray, Ms. Anning's dog and fossil collecting companion. Tray was trained to sit next to interesting finds while Anning retrieved her equipment from other locations. He perished under a sudden cliff-face collapse in 1833 which nearly took Ms. Anning's life as well.


Yet, despite her firsthand experience and deep knowledge of these subjects, Ms. Anning was unable to take part officially in the scientific societies of the day which were only open to men. Her discoveries and observations were instead shared through others, with the one notable exception being her drawing of a complete Plesiosaur. In this instance, the noted French anatomist Georges Cuvier proclaimed the animal a hoax. It would take numerous examinations and debate before Cuvier would reverse his position and admit he'd rushed to judgement.


Ms. Anning died in 1847 of breast cancer. It would take another 163 years for the Royal Society to recognize her influence in the advancement of science.

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