The Stelladens mysteriosus is an enigmatic species from the Maastrichtian stage of the Late Cretaceous, approximately 70 to 66 million years ago. Measuring 3 cm in length, this fossil tooth represents one of the few tangible remains of a rare and mysterious predator. The genus Stelladens, whose name translates to "star tooth," refers to the unique star-like cross-section of its teeth, a feature that sets it apart from other marine or terrestrial creatures of the period.

This 3 cm tooth is incredibly well-preserved, showcasing the fine details of its serrated edges and pointed cusp, which likely played a key role in slicing through prey. The tooth’s robust shape suggests that Stelladens was a powerful predator, possibly preying on smaller marine reptiles, fish, or even invertebrates within its ecosystem.

Fossils from the Maastrichtian stage are relatively rare, especially those as distinct as this, which makes it a significant find for collectors and researchers alike. The light beige to brown coloration of the tooth contrasts against the fine enamel texture, indicating its ancient nature while also preserving its intricate structure. Discovered in marine sediment deposits, this fossil offers a fascinating glimpse into the rich biodiversity of the Late Cretaceous seas, a period just before the mass extinction event that wiped out many large reptiles, including the dinosaurs.

Its size, preservation quality, and unique morphology make this Stelladens mysteriosus tooth a remarkable specimen for both scientific study and private collections, offering a window into the mysterious predators that once roamed the ancient oceans.