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Bulk Fossil Mosasaur Teeth - 25 Pack

These are small, authentic fossil Mosasaur teeth from the Upper Cretaceous (~70 million year old) phosphate deposits near Khourigba, Morocco. Small Mosasaur teeth are quite common in these deposits and are collected by locals as a byproduct of the massive phosphate mining operations in the area.

You will receive twenty five teeth chosen at random from my box of Mosasaur teeth. There are teeth from several different species of Mosasaurs and they are almost all between 1 and 1 1/2 inches long. The teeth are all complete or mostly complete (maybe a tip missing or a chip out of the side). Some of them were found in pieces and glued back together. The photos are representative of these teeth, but are not exact teeth that you will receive. An ID card will be included for each specimen.


Artists reconstruction of the mosasaur Prognathodon saturator.
are a family of enormous, marine reptiles that truly dominated the seas 90 million years ago. They ruled during the last 20-25 million years of the Cretaceous period. With the extinction of the ichthyosaurs and decline of plesiosaurs, mosasaurs diversified to become prolific, apex predators in nearly every habitat of the oceanic world.

Larger mosasaurs were the great leviathans of their time, extending 10–15 m, or 33–49 ft long. Hainosaurus holds the record for longest mosasaur, at a seemingly impossible, 57 ft. The smaller genera were still an impressive, 10–20 ft long. Mosasaurs probably evolved from semi-aquatic, scaled reptiles which were more similar in appearance to modern-day monitor lizards. They had double-hinged jaws and flexible skulls (much like that of a snake), which enabled them to gulp down their prey almost whole.

The gruesome, unchewed contents of fossilized mosasaur guts have revealed a varied diet of sea birds, ammonites, smaller marine lizards, possibly shark, and even other mosasaurs. Ammonites were especially crunchy mosasaur treats. They were abundant in the Cretaceous sea, and some Mosasaur had specialized teeth for the job.

Mosasaurs probably lurked for an ambush, rather than hunt, possibly using their powerful tail flukes for extra thrust to dart out and swallow unsuspecting prey. Non-reflective, keeled scales may have been a great advantage to the Mosasaur sneak-

Mosasaurs breathed air and gave birth to live young. The bronchi leading to the lungs run parallel to each other instead of splitting apart from one another as in monitors and other terrestrial reptiles. They were well-adapted to living in the warm, shallow, epicontinental seas of the period.

Although Mosasaurs diversified and proliferated at a spectacular rate, their specialization is considered the source of their demise when marine systems collapsed at the end of the Cretaceous.
7 Available
Mosasaur Teeth
Several Species
Upper Cretaceous
Khourigba, Morocco
1 to 1.5"