A mosasaur tooth of a Stelladens mysteriosus from the Couche III in the phosphate mines of Sidi Chennane, Oued Zem, Khouribga, Morocco. These odd teeth are unlike any known mosasaur, and can be distinguished by their star or screwdriver-shaped crown. Fossils of this rare species were likely mistaken as pathological teeth of Mosasaurus beaugei prior to description.









