Mosasaurus Tooth with Root
Mosasaurs were ancient reptiles (related to snakes and lizards). They lived in waterways, had a shark-like fin, and grew up to 50 feet long.
Late Cretaceous: 70-66 million years ago
These fossils were discovered in Morocco, Africa
These fossils have been museum prepped (tooth and root have been reattached)
Each one is an ancient fossil and will have unique variances
Sizes will be approximately 3-4" long
 
- The Mosasaurus 
Mosasaurus is the type genus of the mosasaurs, an extinct group of aquatic squamate reptiles. It lived from about 82 to 66 million years ago during the Campanian and Maastrichtian stages of the Late Cretaceous. The earliest fossils known to science were found as skulls in a chalk quarry near the Dutch city of Maastricht in the late 1700s, which were initially thought to have been the bones of crocodiles or whales. One particular skull discovered at around 1780, and which was seized during the French Revolutionary Wars for its scientific value and transported to Paris, was famously nicknamed the "great animal of Maastricht". In 1808, naturalist Georges Cuvier concluded that it belonged to a giant marine lizard with similarities to monitor lizards but otherwise unlike any animal known today. This concept was revolutionary at the time and helped support the then-developing ideas of extinction. However, Cuvier did not designate a scientific name for the new animal; this task was completed by William Daniel Conybeare in 1822 when he named it Mosasaurus about its origin in fossil deposits near the Meuse River; the name is accordingly a portmanteau derived from the words Mosa and Saurus. The relationships between Mosasaurus and modern reptiles are controversial and scientists continue to debate whether its closest living relatives are monitor lizards or snakes.