This dinosaur fossil teeth are of the jaw bones from the Mosasaurus marine creature also known as the giant lizard. These fossils are found in the sand matrix from the fossil beds of the Atlas mountains in northern Africa. The fossil teeth are from the late Cretaceous period. The first fossil remains were discovered in a limestone quarry at Maastricht on the Meuse in 1764. These ferocious marine predators are now considered to be the closest relatives to the modern snakes, due to similarities in jaw and skull. Mosasaursu were lepidosaurus reptiles with overlapping scales. These predators evolved from semi-aquatic squamates known as the aigialosaurus, close relatives of modern-day monitor lizards,
