Scientific name: Ouranosaurus nigeriensis, (Taquet, 1976) - Basal Hadrosaur Location: Gadoufaoua, Téneré Desert, Niger. Geological Formation: Elrhaz Fm Age: Lower Cretaceous, Aptian/Albian stage ( 113 million years) Size: 1.5 cm Ref: 2025 Here we introduce this exceedingly rare dinosaur tooth from Elrhaz Fm. It is an authentic tooth of Ouranosaurus, herbivorous basal hadrosaur dinosaur that lived during the Aptian stage of the Early Cretaceous of modern-day Niger and Cameroon. Ouranosaurus was a relatively large iguanodontian. The Elrhaz Formation is mostly made up of fluvial sandstones. A diverse assemblage of fossil animals has been recovered, bony fish, turtles, several genera of crocodylomorphs (Anatosuchus, Araripesuchus, Sarcosuchus, and Stolokrosuchus), undescribed ornithocheirid pterosaurs, the theropod dinosaurs Eocarcharia, Kryptops, Suchomimus, and an undescribed noasaurid (possibly Bahariasaurus), the sauropods Nigersaurus and an undescribed titanosaurian, and the iguanodontians Lurdusaurus and Ouranosaurus. All our fossils comes with Certificate of Authenticity.