Tooth "Halisaurus"


In phosphate deposit, 90 million years ago, Morocco, private collection from Netherland.

Set of mosasaur (Halisaurus arambourgi) tooth with bone fragments. In the center of the piece are one tooth in the limestone/ phosphate deposit. Mosasaurs are a family of enormous, marine reptiles that truly dominated the seas 90 million years ago in the Cretaceous period.

These large, 10-15 m long (Mosasaur hoffmannii, over 17m ) extinct marine lizards breathed air, were powerful swimmers and they gave birth to live young. Mosasaurs propbably evolved from semi- aquatic, scaled reptiles which were more similiar in appearance to modern-day monitor lizards. They had double-hinged jaws and flexible skulls, which enabled the to gulp down they prey almost whole. The fossilized mosasaur guts have revealed a varied diet of sea turtles, sharks, ammonites, smaller marine lizard (young plesiosaurs), seabirds and even other mosasaurs.

A tooth and bone fragmets in matrix. There also exist smaller bone fragments and several fish vertebrae (probably Otodos-shark). Age-related wear, fractures, cracks. Repaired. Size of the matrix c. 5cm x 4,5cm (teeth 4,5cm x 1,5cm).